./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 599bde24b734dff8bcd3a53946a1033ced468fb55cf924fdefecd161d0c1af79 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:54:03,581 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:54:03,665 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:54:03,673 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:54:03,674 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:54:03,707 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:54:03,708 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:54:03,709 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:54:03,710 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:54:03,710 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:54:03,711 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:54:03,712 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:54:03,713 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:54:03,714 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:54:03,715 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:54:03,715 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:54:03,716 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:54:03,717 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:54:03,718 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:54:03,718 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:54:03,719 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:54:03,726 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:54:03,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:54:03,728 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:54:03,728 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:54:03,729 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:54:03,729 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:54:03,730 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:54:03,730 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:54:03,731 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:54:03,731 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:54:03,732 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:54:03,732 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:54:03,733 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:54:03,733 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:54:03,734 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:54:03,734 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:54:03,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:54:03,735 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:54:03,736 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:54:03,739 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:54:03,739 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:54:03,739 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:54:03,740 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:54:03,741 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:54:03,741 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:54:03,743 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:54:03,743 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_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 599bde24b734dff8bcd3a53946a1033ced468fb55cf924fdefecd161d0c1af79 [2023-11-24 23:54:04,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:54:04,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:54:04,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:54:04,135 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:54:04,138 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:54:04,140 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2023-11-24 23:54:07,777 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:54:08,005 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:54:08,006 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c [2023-11-24 23:54:08,013 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/data/74507f32f/23a7f018ad874780a19dbbb5c80e5807/FLAG7b2e95b93 [2023-11-24 23:54:08,028 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/data/74507f32f/23a7f018ad874780a19dbbb5c80e5807 [2023-11-24 23:54:08,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:54:08,032 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:54:08,034 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:54:08,034 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:54:08,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:54:08,041 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f384b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08, skipping insertion in model container [2023-11-24 23:54:08,043 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,065 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:54:08,218 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_c1e1758f-4ffc-4edc-8f51-31c61fe86191/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c[420,433] [2023-11-24 23:54:08,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:54:08,248 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:54:08,258 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_c1e1758f-4ffc-4edc-8f51-31c61fe86191/sv-benchmarks/c/array-cav19/array_tripl_access_init_const.c[420,433] [2023-11-24 23:54:08,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:54:08,284 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:54:08,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08 WrapperNode [2023-11-24 23:54:08,285 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:54:08,286 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:54:08,286 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:54:08,286 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:54:08,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,299 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,321 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2023-11-24 23:54:08,322 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:54:08,323 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:54:08,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:54:08,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:54:08,333 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,348 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,348 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,354 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,357 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,361 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:54:08,362 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:54:08,363 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:54:08,363 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:54:08,366 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (1/1) ... [2023-11-24 23:54:08,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:54:08,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:08,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:54:08,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:54:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:54:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:54:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:54:08,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 23:54:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:54:08,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:54:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 23:54:08,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:54:08,511 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:54:08,513 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:54:08,660 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:54:08,703 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:54:08,703 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 23:54:08,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:54:08 BoogieIcfgContainer [2023-11-24 23:54:08,706 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:54:08,709 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:54:08,709 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:54:08,713 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:54:08,714 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:54:08" (1/3) ... [2023-11-24 23:54:08,714 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719a4b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:54:08, skipping insertion in model container [2023-11-24 23:54:08,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:54:08" (2/3) ... [2023-11-24 23:54:08,715 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719a4b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:54:08, skipping insertion in model container [2023-11-24 23:54:08,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:54:08" (3/3) ... [2023-11-24 23:54:08,717 INFO L112 eAbstractionObserver]: Analyzing ICFG array_tripl_access_init_const.c [2023-11-24 23:54:08,737 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:54:08,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:54:08,785 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:54:08,792 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=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@311013ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:54:08,793 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:54:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 23:54:08,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:08,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 23:54:08,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:08,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:08,810 INFO L85 PathProgramCache]: Analyzing trace with hash 73607700, now seen corresponding path program 1 times [2023-11-24 23:54:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:08,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352739886] [2023-11-24 23:54:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:08,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:09,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:09,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352739886] [2023-11-24 23:54:09,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352739886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:54:09,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:54:09,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 23:54:09,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401991098] [2023-11-24 23:54:09,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:54:09,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:54:09,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:09,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:54:09,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:54:09,086 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:09,122 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2023-11-24 23:54:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:54:09,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 23:54:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:09,146 INFO L225 Difference]: With dead ends: 15 [2023-11-24 23:54:09,146 INFO L226 Difference]: Without dead ends: 8 [2023-11-24 23:54:09,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:54:09,159 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:09,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:54:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-11-24 23:54:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-11-24 23:54:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-11-24 23:54:09,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2023-11-24 23:54:09,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:09,216 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-11-24 23:54:09,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:09,217 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-11-24 23:54:09,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 23:54:09,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:09,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 23:54:09,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:54:09,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:09,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:09,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2018762011, now seen corresponding path program 1 times [2023-11-24 23:54:09,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:09,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213501547] [2023-11-24 23:54:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:09,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:09,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:09,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213501547] [2023-11-24 23:54:09,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213501547] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:09,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989709118] [2023-11-24 23:54:09,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:09,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:09,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:09,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:09,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:54:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:09,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 23:54:09,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:09,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:54:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:09,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989709118] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:54:09,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1722333416] [2023-11-24 23:54:09,694 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:54:09,695 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:54:09,699 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:54:09,705 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:54:09,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:54:10,157 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:54:10,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '82#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem6#1| 1) 0) (= 100000 |ULTIMATE.start_main_~N~0#1|))' at error location [2023-11-24 23:54:10,316 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:54:10,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:54:10,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-24 23:54:10,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692380706] [2023-11-24 23:54:10,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:54:10,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 23:54:10,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:10,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 23:54:10,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:54:10,323 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:10,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:10,366 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2023-11-24 23:54:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 23:54:10,367 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 23:54:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:10,367 INFO L225 Difference]: With dead ends: 16 [2023-11-24 23:54:10,367 INFO L226 Difference]: Without dead ends: 11 [2023-11-24 23:54:10,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=73, Unknown=0, NotChecked=0, Total=132 [2023-11-24 23:54:10,375 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:10,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:54:10,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-11-24 23:54:10,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-11-24 23:54:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-11-24 23:54:10,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2023-11-24 23:54:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:10,386 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-11-24 23:54:10,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-11-24 23:54:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:54:10,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:10,389 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2023-11-24 23:54:10,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:54:10,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-24 23:54:10,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:10,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash 188962388, now seen corresponding path program 2 times [2023-11-24 23:54:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:10,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957096550] [2023-11-24 23:54:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:10,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:10,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:10,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957096550] [2023-11-24 23:54:10,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957096550] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:10,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034898245] [2023-11-24 23:54:10,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:54:10,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:10,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:10,821 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:10,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:54:10,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 23:54:10,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:54:10,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 23:54:10,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:11,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:54:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:11,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034898245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:54:11,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1439804854] [2023-11-24 23:54:11,117 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:54:11,117 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:54:11,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:54:11,118 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:54:11,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:54:11,330 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:54:11,442 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem6#1| 1) 0) (= 100000 |ULTIMATE.start_main_~N~0#1|))' at error location [2023-11-24 23:54:11,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:54:11,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:54:11,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-11-24 23:54:11,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832765602] [2023-11-24 23:54:11,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:54:11,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 23:54:11,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:11,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 23:54:11,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=235, Unknown=0, NotChecked=0, Total=420 [2023-11-24 23:54:11,445 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:11,495 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2023-11-24 23:54:11,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 23:54:11,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-24 23:54:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:11,497 INFO L225 Difference]: With dead ends: 22 [2023-11-24 23:54:11,497 INFO L226 Difference]: Without dead ends: 17 [2023-11-24 23:54:11,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=235, Unknown=0, NotChecked=0, Total=420 [2023-11-24 23:54:11,499 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:11,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 23:54:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-24 23:54:11,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-24 23:54:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-24 23:54:11,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2023-11-24 23:54:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:11,505 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-24 23:54:11,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-24 23:54:11,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 23:54:11,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:11,506 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-24 23:54:11,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:54:11,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-24 23:54:11,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:11,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:11,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1738955956, now seen corresponding path program 3 times [2023-11-24 23:54:11,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:11,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214183392] [2023-11-24 23:54:11,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:11,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:12,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214183392] [2023-11-24 23:54:12,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214183392] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944564878] [2023-11-24 23:54:12,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 23:54:12,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:12,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:12,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:12,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:54:12,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 23:54:12,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 23:54:12,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 23:54:12,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:12,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:54:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:12,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944564878] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:54:12,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1571106899] [2023-11-24 23:54:12,776 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:54:12,777 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:54:12,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:54:12,777 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:54:12,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:54:12,939 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:54:13,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '378#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem6#1| 1) 0) (= 100000 |ULTIMATE.start_main_~N~0#1|))' at error location [2023-11-24 23:54:13,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:54:13,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:54:13,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-11-24 23:54:13,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541760129] [2023-11-24 23:54:13,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:54:13,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-24 23:54:13,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:13,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-24 23:54:13,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=829, Unknown=0, NotChecked=0, Total=1482 [2023-11-24 23:54:13,061 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:13,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:13,134 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2023-11-24 23:54:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-24 23:54:13,135 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-24 23:54:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:13,136 INFO L225 Difference]: With dead ends: 34 [2023-11-24 23:54:13,136 INFO L226 Difference]: Without dead ends: 29 [2023-11-24 23:54:13,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=653, Invalid=829, Unknown=0, NotChecked=0, Total=1482 [2023-11-24 23:54:13,142 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:13,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:54:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-24 23:54:13,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-24 23:54:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-11-24 23:54:13,159 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2023-11-24 23:54:13,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:13,160 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-11-24 23:54:13,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:13,161 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-11-24 23:54:13,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 23:54:13,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:13,164 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2023-11-24 23:54:13,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 23:54:13,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-24 23:54:13,370 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:13,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:13,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1286574452, now seen corresponding path program 4 times [2023-11-24 23:54:13,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:13,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662486772] [2023-11-24 23:54:13,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:13,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:13,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:14,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:14,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662486772] [2023-11-24 23:54:14,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662486772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:14,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005036063] [2023-11-24 23:54:14,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 23:54:14,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:14,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:14,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:14,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:54:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:14,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-24 23:54:14,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:54:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:14,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:54:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:15,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005036063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:54:15,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970832853] [2023-11-24 23:54:15,833 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-11-24 23:54:15,833 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:54:15,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:54:15,833 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:54:15,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-24 23:54:16,056 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-24 23:54:16,305 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '721#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_129| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100001 |v_ULTIMATE.start_main_~i~0#1_129|) (= 100000 |ULTIMATE.start_main_~N~0#1|))) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_main_#t~mem6#1| 1) 0))' at error location [2023-11-24 23:54:16,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-24 23:54:16,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 23:54:16,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2023-11-24 23:54:16,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024240493] [2023-11-24 23:54:16,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 23:54:16,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-24 23:54:16,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:54:16,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-24 23:54:16,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2453, Invalid=3097, Unknown=0, NotChecked=0, Total=5550 [2023-11-24 23:54:16,313 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:54:16,475 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2023-11-24 23:54:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-24 23:54:16,478 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-24 23:54:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:54:16,480 INFO L225 Difference]: With dead ends: 58 [2023-11-24 23:54:16,480 INFO L226 Difference]: Without dead ends: 53 [2023-11-24 23:54:16,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2585 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2453, Invalid=3097, Unknown=0, NotChecked=0, Total=5550 [2023-11-24 23:54:16,484 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 23:54:16,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 23:54:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-24 23:54:16,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-24 23:54:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-11-24 23:54:16,509 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2023-11-24 23:54:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:54:16,509 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-11-24 23:54:16,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:54:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-11-24 23:54:16,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 23:54:16,512 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:54:16,513 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2023-11-24 23:54:16,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:54:16,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:16,719 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:54:16,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:54:16,720 INFO L85 PathProgramCache]: Analyzing trace with hash -105473292, now seen corresponding path program 5 times [2023-11-24 23:54:16,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:54:16,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279691808] [2023-11-24 23:54:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:54:16,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:54:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:54:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:54:19,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:54:19,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279691808] [2023-11-24 23:54:19,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279691808] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:54:19,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202542169] [2023-11-24 23:54:19,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 23:54:19,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:54:19,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:54:19,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:54:19,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1e1758f-4ffc-4edc-8f51-31c61fe86191/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process