./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:59:45,558 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:59:45,680 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 20:59:45,694 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:59:45,695 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:59:45,735 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:59:45,736 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:59:45,736 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:59:45,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:59:45,742 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:59:45,743 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:59:45,744 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:59:45,745 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:59:45,747 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:59:45,747 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:59:45,748 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:59:45,748 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:59:45,749 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:59:45,749 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:59:45,750 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:59:45,750 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:59:45,751 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:59:45,752 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:59:45,753 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 20:59:45,753 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:59:45,754 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:59:45,754 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:59:45,755 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:59:45,755 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 20:59:45,756 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:59:45,757 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 20:59:45,758 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:59:45,758 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 20:59:45,758 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:59:45,759 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:59:45,759 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:59:45,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:59:45,760 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:59:45,760 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:59:45,760 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 20:59:45,761 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:59:45,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:59:45,762 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 20:59:45,762 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:59:45,763 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:59:45,763 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_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fecbd384f63aa34e01807a3a6735a322a2435f1312f0df3ed763fde7f43fe0a [2023-11-06 20:59:46,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:59:46,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:59:46,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:59:46,099 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:59:46,100 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:59:46,101 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2023-11-06 20:59:49,379 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:59:49,624 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:59:49,632 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i [2023-11-06 20:59:49,664 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/data/06c4e1d12/92c836de562e42f19457d265457037ed/FLAGca19ba3d8 [2023-11-06 20:59:49,682 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/data/06c4e1d12/92c836de562e42f19457d265457037ed [2023-11-06 20:59:49,688 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:59:49,690 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:59:49,693 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:59:49,698 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:59:49,706 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:59:49,707 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:59:49" (1/1) ... [2023-11-06 20:59:49,708 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6c8dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:49, skipping insertion in model container [2023-11-06 20:59:49,708 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:59:49" (1/1) ... [2023-11-06 20:59:49,770 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:59:50,197 WARN L240 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_784595a5-0814-427e-a771-897ddbf6c341/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2023-11-06 20:59:50,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:59:50,217 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:59:50,270 WARN L240 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_784595a5-0814-427e-a771-897ddbf6c341/sv-benchmarks/c/list-simple/sll2c_update_all_reverse.i[24436,24449] [2023-11-06 20:59:50,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:59:50,305 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:59:50,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50 WrapperNode [2023-11-06 20:59:50,306 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:59:50,307 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:59:50,307 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:59:50,308 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:59:50,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (1/1) ... [2023-11-06 20:59:50,356 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (1/1) ... [2023-11-06 20:59:50,383 INFO L138 Inliner]: procedures = 126, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2023-11-06 20:59:50,396 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:59:50,397 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:59:50,397 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:59:50,397 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:59:50,407 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (1/1) ... [2023-11-06 20:59:50,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (1/1) ... [2023-11-06 20:59:50,412 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (1/1) ... [2023-11-06 20:59:50,412 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (1/1) ... [2023-11-06 20:59:50,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (1/1) ... [2023-11-06 20:59:50,424 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (1/1) ... [2023-11-06 20:59:50,426 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (1/1) ... [2023-11-06 20:59:50,428 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (1/1) ... [2023-11-06 20:59:50,432 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:59:50,433 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:59:50,433 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:59:50,433 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:59:50,434 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (1/1) ... [2023-11-06 20:59:50,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:59:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:59:50,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:59:50,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:59:50,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:59:50,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:59:50,519 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-06 20:59:50,519 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-06 20:59:50,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:59:50,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:59:50,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:59:50,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:59:50,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:59:50,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:59:50,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:59:50,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:59:50,668 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:59:50,671 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:59:50,939 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:59:51,002 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:59:51,003 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-06 20:59:51,006 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:59:51 BoogieIcfgContainer [2023-11-06 20:59:51,006 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:59:51,009 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:59:51,017 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:59:51,021 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:59:51,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:59:49" (1/3) ... [2023-11-06 20:59:51,023 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49314d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:59:51, skipping insertion in model container [2023-11-06 20:59:51,023 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:59:50" (2/3) ... [2023-11-06 20:59:51,023 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49314d2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:59:51, skipping insertion in model container [2023-11-06 20:59:51,023 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:59:51" (3/3) ... [2023-11-06 20:59:51,025 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_update_all_reverse.i [2023-11-06 20:59:51,050 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:59:51,051 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 20:59:51,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:59:51,148 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1659316b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:59:51,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 20:59:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:59:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 20:59:51,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:51,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:59:51,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:59:51,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:51,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1591037076, now seen corresponding path program 1 times [2023-11-06 20:59:51,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:51,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888326829] [2023-11-06 20:59:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:51,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:59:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:59:51,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:59:51,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888326829] [2023-11-06 20:59:51,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888326829] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:59:51,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:59:51,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:59:51,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796336074] [2023-11-06 20:59:51,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:59:51,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:59:51,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:59:51,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:59:51,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:59:51,747 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:59:51,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:59:51,815 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2023-11-06 20:59:51,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:59:51,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-06 20:59:51,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:59:51,826 INFO L225 Difference]: With dead ends: 37 [2023-11-06 20:59:51,826 INFO L226 Difference]: Without dead ends: 19 [2023-11-06 20:59:51,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:59:51,833 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:59:51,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:59:51,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-06 20:59:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2023-11-06 20:59:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:59:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-06 20:59:51,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 12 [2023-11-06 20:59:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:59:51,875 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-06 20:59:51,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:59:51,875 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-06 20:59:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 20:59:51,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:51,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:59:51,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:59:51,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:59:51,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1328846498, now seen corresponding path program 1 times [2023-11-06 20:59:51,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:51,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729253035] [2023-11-06 20:59:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:51,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:59:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 20:59:52,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:59:52,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729253035] [2023-11-06 20:59:52,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729253035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:59:52,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:59:52,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:59:52,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953305874] [2023-11-06 20:59:52,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:59:52,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:59:52,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:59:52,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:59:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:59:52,072 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:59:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:59:52,122 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2023-11-06 20:59:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:59:52,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-11-06 20:59:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:59:52,124 INFO L225 Difference]: With dead ends: 29 [2023-11-06 20:59:52,124 INFO L226 Difference]: Without dead ends: 24 [2023-11-06 20:59:52,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:59:52,126 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:59:52,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:59:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-06 20:59:52,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2023-11-06 20:59:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:59:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2023-11-06 20:59:52,135 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 18 [2023-11-06 20:59:52,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:59:52,135 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2023-11-06 20:59:52,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:59:52,136 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2023-11-06 20:59:52,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 20:59:52,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:52,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:59:52,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:59:52,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:59:52,138 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:52,138 INFO L85 PathProgramCache]: Analyzing trace with hash 2002600429, now seen corresponding path program 1 times [2023-11-06 20:59:52,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:52,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514440172] [2023-11-06 20:59:52,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:52,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:59:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 20:59:52,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:59:52,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514440172] [2023-11-06 20:59:52,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514440172] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:59:52,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:59:52,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:59:52,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580053115] [2023-11-06 20:59:52,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:59:52,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:59:52,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:59:52,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:59:52,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:59:52,424 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:59:52,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:59:52,529 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2023-11-06 20:59:52,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:59:52,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-06 20:59:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:59:52,532 INFO L225 Difference]: With dead ends: 32 [2023-11-06 20:59:52,532 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 20:59:52,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:59:52,536 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:59:52,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 37 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:59:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 20:59:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2023-11-06 20:59:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:59:52,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-06 20:59:52,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 20 [2023-11-06 20:59:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:59:52,555 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-06 20:59:52,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 20:59:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-06 20:59:52,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 20:59:52,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:52,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:59:52,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 20:59:52,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:59:52,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:52,563 INFO L85 PathProgramCache]: Analyzing trace with hash -135389111, now seen corresponding path program 1 times [2023-11-06 20:59:52,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:52,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421570479] [2023-11-06 20:59:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:52,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:59:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 20:59:52,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:59:52,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421570479] [2023-11-06 20:59:52,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421570479] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:59:52,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410515175] [2023-11-06 20:59:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:52,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:59:52,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:59:52,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:59:52,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:59:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:52,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 20:59:52,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:59:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 20:59:52,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:59:52,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 20:59:52,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410515175] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:59:52,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [884541058] [2023-11-06 20:59:53,008 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 20:59:53,009 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:59:53,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:59:53,027 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:59:53,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:59:54,915 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-11-06 20:59:54,980 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:59:55,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [884541058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:59:55,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:59:55,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [5, 5, 5] total 19 [2023-11-06 20:59:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955522098] [2023-11-06 20:59:55,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:59:55,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 20:59:55,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:59:55,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 20:59:55,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-06 20:59:55,941 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 14 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:59:56,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:59:56,824 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-11-06 20:59:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 20:59:56,825 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-11-06 20:59:56,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:59:56,826 INFO L225 Difference]: With dead ends: 33 [2023-11-06 20:59:56,826 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 20:59:56,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-11-06 20:59:56,828 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:59:56,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:59:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 20:59:56,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2023-11-06 20:59:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:59:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-11-06 20:59:56,839 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 21 [2023-11-06 20:59:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:59:56,840 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-11-06 20:59:56,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:59:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-06 20:59:56,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 20:59:56,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:56,842 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:59:56,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:59:57,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:59:57,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:59:57,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:57,049 INFO L85 PathProgramCache]: Analyzing trace with hash 95617812, now seen corresponding path program 1 times [2023-11-06 20:59:57,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:57,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067463608] [2023-11-06 20:59:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:57,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:59:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 20:59:57,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:59:57,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067463608] [2023-11-06 20:59:57,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067463608] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:59:57,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773695001] [2023-11-06 20:59:57,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:57,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:59:57,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:59:57,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:59:57,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:59:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:59:57,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 20:59:57,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:59:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 20:59:57,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:59:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 20:59:57,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773695001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:59:57,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1066385110] [2023-11-06 20:59:57,428 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 20:59:57,428 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:59:57,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:59:57,429 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:59:57,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:59:58,712 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-11-06 20:59:58,751 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:59:59,649 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '657#(and (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483648)) (not (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647) (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_22| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_22| Int)) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_22|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_22|)))))' at error location [2023-11-06 20:59:59,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:59:59,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:59:59,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-11-06 20:59:59,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422331956] [2023-11-06 20:59:59,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:59:59,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:59:59,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:59:59,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:59:59,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=324, Unknown=2, NotChecked=0, Total=380 [2023-11-06 20:59:59,654 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 20:59:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:59:59,747 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2023-11-06 20:59:59,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:59:59,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2023-11-06 20:59:59,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:59:59,748 INFO L225 Difference]: With dead ends: 35 [2023-11-06 20:59:59,748 INFO L226 Difference]: Without dead ends: 28 [2023-11-06 20:59:59,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=68, Invalid=392, Unknown=2, NotChecked=0, Total=462 [2023-11-06 20:59:59,750 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:59:59,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 38 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:59:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-06 20:59:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2023-11-06 20:59:59,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:59:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-06 20:59:59,792 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 22 [2023-11-06 20:59:59,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:59:59,792 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-06 20:59:59,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 20:59:59,793 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-06 20:59:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 20:59:59,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:59:59,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:59:59,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 20:59:59,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:59:59,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:59:59,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:59:59,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1796443355, now seen corresponding path program 2 times [2023-11-06 20:59:59,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:59:59,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594345053] [2023-11-06 20:59:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:59:59,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:01,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:01,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594345053] [2023-11-06 21:00:01,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594345053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:01,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835209333] [2023-11-06 21:00:01,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:00:01,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:01,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:01,946 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:01,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:00:02,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 21:00:02,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:00:02,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-06 21:00:02,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:02,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 21:00:02,391 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 21:00:02,391 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-06 21:00:02,456 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 21:00:02,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 21:00:02,540 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 21:00:02,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-06 21:00:02,548 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 21:00:02,787 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 21:00:02,787 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2023-11-06 21:00:02,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-06 21:00:02,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2023-11-06 21:00:02,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:00:02,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2023-11-06 21:00:02,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 21:00:02,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2023-11-06 21:00:02,969 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-06 21:00:03,108 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-11-06 21:00:03,119 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-06 21:00:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 21:00:03,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:03,357 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_374 Int) (v_ArrVal_371 Int) (v_ArrVal_373 (Array Int Int))) (= (+ (let ((.cse0 (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_373) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse0 v_ArrVal_371)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) .cse0 v_ArrVal_374)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 4))) 1) (* |c_ULTIMATE.start_main_~len~0#1| 2))) is different from false [2023-11-06 21:00:03,537 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:00:03,538 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 51 [2023-11-06 21:00:03,553 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:00:03,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 103 [2023-11-06 21:00:03,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2023-11-06 21:00:03,634 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_370 (Array Int Int)) (v_ArrVal_371 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_370) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_371) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~s~0#1.base|))))) (= (* |c_ULTIMATE.start_main_~len~0#1| 2) (+ |c_ULTIMATE.start_sll_circular_update_at_~data#1| 1)) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_374 Int) (v_ArrVal_368 (Array Int Int))) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_368) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_374) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|)))) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (forall ((v_ArrVal_370 (Array Int Int)) (v_ArrVal_371 Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_370) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_371) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_main_~s~0#1.offset|)))) is different from false [2023-11-06 21:00:03,691 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (and (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_374 Int) (v_ArrVal_368 (Array Int Int))) (= (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_368) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_374) |c_ULTIMATE.start_main_~s~0#1.offset|) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))))) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (forall ((v_ArrVal_370 (Array Int Int)) (v_ArrVal_371 Int)) (= .cse0 (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_370) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_371) |c_ULTIMATE.start_main_~s~0#1.offset|))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_main_~s~0#1.offset|))) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (forall ((v_ArrVal_370 (Array Int Int)) (v_ArrVal_371 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_370) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_371) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_main_~s~0#1.base|))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_main_~s~0#1.offset|))) (= (* |c_ULTIMATE.start_main_~len~0#1| 2) (+ |c_ULTIMATE.start_sll_circular_update_at_~data#1| 1)))) is different from false [2023-11-06 21:00:03,741 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (forall ((v_ArrVal_374 Int) (v_ArrVal_368 (Array Int Int))) (= (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_368) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_374) |c_ULTIMATE.start_main_~s~0#1.offset|) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_main_~s~0#1.offset|))) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (forall ((v_ArrVal_370 (Array Int Int)) (v_ArrVal_371 Int)) (= .cse0 (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_370) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_371) |c_ULTIMATE.start_main_~s~0#1.offset|))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_main_~s~0#1.offset|))) (= |c_ULTIMATE.start_main_~len~0#1| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_370 (Array Int Int)) (v_ArrVal_371 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_370) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_371) |c_ULTIMATE.start_main_~s~0#1.offset|)))))))) is different from false [2023-11-06 21:00:03,789 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_365 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_370 (Array Int Int)) (v_ArrVal_371 Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_365))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (= .cse0 (select (store (select (store .cse1 .cse0 v_ArrVal_370) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_371) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))))) (forall ((v_ArrVal_366 (Array Int Int)) (v_ArrVal_365 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_374 Int) (v_ArrVal_368 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_366))) (= (select (select .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (select (store (select (store .cse2 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_365) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_368) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_374) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) (forall ((v_ArrVal_365 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_370 (Array Int Int)) (v_ArrVal_371 Int)) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (store (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_365))) (store .cse3 (select (select .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_370)) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_52| 4) v_ArrVal_371) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))))) is different from false [2023-11-06 21:00:03,813 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 21:00:03,813 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 41 [2023-11-06 21:00:03,820 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 316 treesize of output 280 [2023-11-06 21:00:03,828 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:00:03,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2023-11-06 21:00:03,835 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:00:03,840 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-11-06 21:00:03,846 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 21:00:03,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2023-11-06 21:00:03,870 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:00:03,871 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 1 [2023-11-06 21:00:03,878 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 21:00:03,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 1 [2023-11-06 21:00:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-11-06 21:00:04,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835209333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:04,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [84914586] [2023-11-06 21:00:04,497 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 21:00:04,497 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:00:04,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:00:04,498 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:00:04,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:00:05,553 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-11-06 21:00:05,591 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:00:07,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '965#(and (not (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 3)) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~s~0#1.base|) 0)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~s~0#1.base|) 0) 4))) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483648)) (= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= 3 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2023-11-06 21:00:07,668 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:00:07,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:07,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 55 [2023-11-06 21:00:07,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651387801] [2023-11-06 21:00:07,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:07,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-06 21:00:07,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:07,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-06 21:00:07,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3789, Unknown=15, NotChecked=640, Total=4692 [2023-11-06 21:00:07,674 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 55 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 47 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 21:00:09,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:09,546 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2023-11-06 21:00:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 21:00:09,547 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 47 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 24 [2023-11-06 21:00:09,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:09,549 INFO L225 Difference]: With dead ends: 50 [2023-11-06 21:00:09,549 INFO L226 Difference]: Without dead ends: 48 [2023-11-06 21:00:09,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=365, Invalid=5042, Unknown=15, NotChecked=740, Total=6162 [2023-11-06 21:00:09,553 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 104 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:09,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 257 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 709 Invalid, 0 Unknown, 263 Unchecked, 0.7s Time] [2023-11-06 21:00:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-06 21:00:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2023-11-06 21:00:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:00:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2023-11-06 21:00:09,569 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 24 [2023-11-06 21:00:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:09,569 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2023-11-06 21:00:09,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 47 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 21:00:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2023-11-06 21:00:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:00:09,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:09,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:09,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:09,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:09,778 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:00:09,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:09,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1964063871, now seen corresponding path program 3 times [2023-11-06 21:00:09,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:09,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565750818] [2023-11-06 21:00:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:09,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 21:00:09,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:09,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565750818] [2023-11-06 21:00:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565750818] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:09,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635164604] [2023-11-06 21:00:09,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:00:09,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:09,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:09,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:09,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:00:10,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:00:10,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:00:10,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:00:10,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:00:10,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 21:00:10,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635164604] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:10,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1589638267] [2023-11-06 21:00:10,183 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 21:00:10,183 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:00:10,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:00:10,184 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:00:10,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:00:11,101 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-11-06 21:00:11,137 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:00:12,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1308#(and (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_35| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_35| Int)) (= (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_35|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_35|)) |ULTIMATE.start_sll_circular_get_data_at_#res#1|)) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483648)) (not (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647))' at error location [2023-11-06 21:00:12,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:00:12,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:12,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2023-11-06 21:00:12,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984472607] [2023-11-06 21:00:12,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:12,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:00:12,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:12,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:00:12,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=569, Unknown=2, NotChecked=0, Total=650 [2023-11-06 21:00:12,072 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 21:00:12,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:12,344 INFO L93 Difference]: Finished difference Result 55 states and 76 transitions. [2023-11-06 21:00:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 21:00:12,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-11-06 21:00:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:12,345 INFO L225 Difference]: With dead ends: 55 [2023-11-06 21:00:12,345 INFO L226 Difference]: Without dead ends: 44 [2023-11-06 21:00:12,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=157, Invalid=963, Unknown=2, NotChecked=0, Total=1122 [2023-11-06 21:00:12,347 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:12,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 47 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:00:12,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-06 21:00:12,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2023-11-06 21:00:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:00:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2023-11-06 21:00:12,363 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 25 [2023-11-06 21:00:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:12,363 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2023-11-06 21:00:12,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 21:00:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2023-11-06 21:00:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:00:12,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:12,365 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:12,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:12,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:12,574 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:00:12,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash -42316673, now seen corresponding path program 4 times [2023-11-06 21:00:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:12,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216308543] [2023-11-06 21:00:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:12,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:00:12,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:12,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216308543] [2023-11-06 21:00:12,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216308543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:12,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765025379] [2023-11-06 21:00:12,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:00:12,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:12,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:12,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:12,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:00:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:12,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:00:12,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:00:12,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 21:00:13,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765025379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:13,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [695710521] [2023-11-06 21:00:13,053 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 21:00:13,053 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:00:13,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:00:13,054 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:00:13,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:00:13,918 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 43 for LOIs [2023-11-06 21:00:13,973 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:00:14,761 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1659#(and (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483648)) (exists ((|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_41| Int) (|v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_41| Int)) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.base_41|) (+ 4 |v_ULTIMATE.start_sll_circular_get_data_at_~head#1.offset_41|)))) (not (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647))' at error location [2023-11-06 21:00:14,761 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:00:14,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:14,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2023-11-06 21:00:14,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978928538] [2023-11-06 21:00:14,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:14,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:00:14,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:00:14,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-11-06 21:00:14,763 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 21:00:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:14,892 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-11-06 21:00:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:00:14,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-11-06 21:00:14,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:14,893 INFO L225 Difference]: With dead ends: 53 [2023-11-06 21:00:14,894 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 21:00:14,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=82, Invalid=517, Unknown=1, NotChecked=0, Total=600 [2023-11-06 21:00:14,895 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:14,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 63 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:00:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 21:00:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2023-11-06 21:00:14,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:00:14,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2023-11-06 21:00:14,909 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 25 [2023-11-06 21:00:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:14,910 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2023-11-06 21:00:14,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 21:00:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2023-11-06 21:00:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 21:00:14,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:14,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:14,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:15,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:15,127 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:00:15,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash 142543800, now seen corresponding path program 5 times [2023-11-06 21:00:15,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:15,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125278248] [2023-11-06 21:00:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:15,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 21:00:15,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:15,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125278248] [2023-11-06 21:00:15,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125278248] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:15,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:00:15,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 21:00:15,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921682770] [2023-11-06 21:00:15,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:15,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 21:00:15,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:15,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 21:00:15,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 21:00:15,228 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 21:00:15,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:15,288 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-11-06 21:00:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:00:15,288 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-11-06 21:00:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:15,289 INFO L225 Difference]: With dead ends: 42 [2023-11-06 21:00:15,289 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 21:00:15,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-06 21:00:15,290 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:15,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 21:00:15,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-06 21:00:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 21:00:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-11-06 21:00:15,303 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2023-11-06 21:00:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:15,303 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-11-06 21:00:15,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 21:00:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-11-06 21:00:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 21:00:15,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:15,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:15,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:00:15,305 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:00:15,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:15,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1792069585, now seen corresponding path program 1 times [2023-11-06 21:00:15,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:15,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211746987] [2023-11-06 21:00:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:15,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:00:16,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:16,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211746987] [2023-11-06 21:00:16,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211746987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:16,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781754592] [2023-11-06 21:00:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:16,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:16,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:16,147 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:16,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_784595a5-0814-427e-a771-897ddbf6c341/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 21:00:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:16,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-06 21:00:16,337 INFO L285 TraceCheckSpWp]: Computing forward predicates...