./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/gcas_6_unsafe.c-amalgamation.i --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_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/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_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/neural-networks/gcas_6_unsafe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/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_99541c63-8406-428d-a0f0-93bf9b956ecc/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 733a3c66777cc5266095007b63f38f4eb78d17be168ff43172932bb9b28e0e5e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:56:04,177 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:56:04,259 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:56:04,271 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:56:04,271 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:56:04,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:56:04,330 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:56:04,331 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:56:04,332 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:56:04,336 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:56:04,337 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:56:04,337 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:56:04,339 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:56:04,347 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:56:04,348 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:56:04,348 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:56:04,349 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:56:04,350 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:56:04,351 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:56:04,351 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:56:04,352 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:56:04,353 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:56:04,354 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:56:04,355 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:56:04,356 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:56:04,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:56:04,357 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:56:04,357 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:56:04,358 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:56:04,358 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:56:04,360 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:56:04,360 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:56:04,361 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:56:04,361 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:56:04,361 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:56:04,362 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:56:04,362 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:56:04,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:04,363 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:56:04,363 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:56:04,364 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:56:04,364 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:56:04,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:56:04,365 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:56:04,366 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:56:04,366 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:56:04,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:56:04,366 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_99541c63-8406-428d-a0f0-93bf9b956ecc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 733a3c66777cc5266095007b63f38f4eb78d17be168ff43172932bb9b28e0e5e [2023-11-24 23:56:04,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:56:04,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:56:04,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:56:04,785 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:56:04,786 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:56:04,788 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/neural-networks/gcas_6_unsafe.c-amalgamation.i [2023-11-24 23:56:08,330 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:56:08,872 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:56:08,873 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/sv-benchmarks/c/neural-networks/gcas_6_unsafe.c-amalgamation.i [2023-11-24 23:56:08,915 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/data/e69fd9740/953d1006a91b4cc59797e634c5c0e303/FLAGc6b4a1855 [2023-11-24 23:56:08,932 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/data/e69fd9740/953d1006a91b4cc59797e634c5c0e303 [2023-11-24 23:56:08,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:56:08,937 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:56:08,939 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:08,939 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:56:08,946 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:56:08,947 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:08" (1/1) ... [2023-11-24 23:56:08,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8001094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:08, skipping insertion in model container [2023-11-24 23:56:08,948 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:56:08" (1/1) ... [2023-11-24 23:56:09,050 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:56:10,019 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_99541c63-8406-428d-a0f0-93bf9b956ecc/sv-benchmarks/c/neural-networks/gcas_6_unsafe.c-amalgamation.i[65239,65252] [2023-11-24 23:56:10,268 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:10,413 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:56:10,536 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_99541c63-8406-428d-a0f0-93bf9b956ecc/sv-benchmarks/c/neural-networks/gcas_6_unsafe.c-amalgamation.i[65239,65252] [2023-11-24 23:56:10,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:56:10,975 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:56:10,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10 WrapperNode [2023-11-24 23:56:10,976 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:56:10,977 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:10,978 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:56:10,978 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:56:10,987 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:11,085 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:11,292 INFO L138 Inliner]: procedures = 619, calls = 2157, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 2547 [2023-11-24 23:56:11,292 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:56:11,293 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:56:11,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:56:11,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:56:11,307 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:11,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:11,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:11,352 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:11,460 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:11,481 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:11,495 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:11,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:11,543 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:56:11,545 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:56:11,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:56:11,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:56:11,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (1/1) ... [2023-11-24 23:56:11,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:56:11,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:11,588 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:56:11,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:56:11,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-24 23:56:11,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 23:56:11,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-11-24 23:56:11,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-24 23:56:11,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:56:11,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:56:11,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:56:11,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 23:56:11,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:56:11,913 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:56:11,916 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:56:15,869 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:56:17,442 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:56:17,443 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-24 23:56:17,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:17 BoogieIcfgContainer [2023-11-24 23:56:17,445 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:56:17,447 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:56:17,448 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:56:17,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:56:17,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:56:08" (1/3) ... [2023-11-24 23:56:17,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74502b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:17, skipping insertion in model container [2023-11-24 23:56:17,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:56:10" (2/3) ... [2023-11-24 23:56:17,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74502b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:56:17, skipping insertion in model container [2023-11-24 23:56:17,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:56:17" (3/3) ... [2023-11-24 23:56:17,454 INFO L112 eAbstractionObserver]: Analyzing ICFG gcas_6_unsafe.c-amalgamation.i [2023-11-24 23:56:17,475 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:56:17,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 23:56:17,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:56:17,533 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;@7baecd8b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:56:17,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 23:56:17,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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 23:56:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 23:56:17,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:17,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:17,547 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:17,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:17,553 INFO L85 PathProgramCache]: Analyzing trace with hash 146369975, now seen corresponding path program 1 times [2023-11-24 23:56:17,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:17,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086676588] [2023-11-24 23:56:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:17,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:19,044 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 23:56:19,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:19,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086676588] [2023-11-24 23:56:19,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086676588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:19,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:56:19,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:56:19,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126280564] [2023-11-24 23:56:19,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:19,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:19,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:19,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:56:19,095 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:56:19,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:19,503 INFO L93 Difference]: Finished difference Result 30 states and 49 transitions. [2023-11-24 23:56:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:19,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 23:56:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:19,513 INFO L225 Difference]: With dead ends: 30 [2023-11-24 23:56:19,513 INFO L226 Difference]: Without dead ends: 16 [2023-11-24 23:56:19,516 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 [2023-11-24 23:56:19,520 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:19,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:56:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-24 23:56:19,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-24 23:56:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:56:19,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 26 transitions. [2023-11-24 23:56:19,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 26 transitions. Word has length 8 [2023-11-24 23:56:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:19,556 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 26 transitions. [2023-11-24 23:56:19,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:56:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 26 transitions. [2023-11-24 23:56:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 23:56:19,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:19,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:19,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:56:19,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:19,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:19,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1495813912, now seen corresponding path program 1 times [2023-11-24 23:56:19,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:19,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22040262] [2023-11-24 23:56:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:19,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:20,484 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 23:56:20,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22040262] [2023-11-24 23:56:20,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22040262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231451049] [2023-11-24 23:56:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:20,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:20,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:20,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:20,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:56:21,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:21,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 2601 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-24 23:56:21,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:21,634 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 23:56:21,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:56:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:56:21,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231451049] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:21,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:56:21,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-24 23:56:21,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351102463] [2023-11-24 23:56:21,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:21,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:21,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:21,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:21,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:56:21,669 INFO L87 Difference]: Start difference. First operand 16 states and 26 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 23:56:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:22,041 INFO L93 Difference]: Finished difference Result 23 states and 36 transitions. [2023-11-24 23:56:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:22,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) Word has length 9 [2023-11-24 23:56:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:22,043 INFO L225 Difference]: With dead ends: 23 [2023-11-24 23:56:22,043 INFO L226 Difference]: Without dead ends: 17 [2023-11-24 23:56:22,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:56:22,045 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:22,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:56:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-24 23:56:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-24 23:56:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:56:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2023-11-24 23:56:22,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 9 [2023-11-24 23:56:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:22,053 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2023-11-24 23:56:22,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 23:56:22,054 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2023-11-24 23:56:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 23:56:22,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:22,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:22,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:22,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:22,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:22,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:22,258 INFO L85 PathProgramCache]: Analyzing trace with hash -929460487, now seen corresponding path program 1 times [2023-11-24 23:56:22,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:22,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796585561] [2023-11-24 23:56:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:22,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 23:56:23,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:23,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796585561] [2023-11-24 23:56:23,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796585561] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:23,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682678789] [2023-11-24 23:56:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:23,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:23,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:23,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:23,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:56:24,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:24,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 2613 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-24 23:56:24,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:56:24,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:56:24,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682678789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:56:24,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:56:24,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-24 23:56:24,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963527253] [2023-11-24 23:56:24,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:24,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:24,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:24,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:24,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:56:24,169 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 23:56:24,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:24,489 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2023-11-24 23:56:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) Word has length 10 [2023-11-24 23:56:24,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:24,495 INFO L225 Difference]: With dead ends: 33 [2023-11-24 23:56:24,495 INFO L226 Difference]: Without dead ends: 20 [2023-11-24 23:56:24,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 23:56:24,497 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:24,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 23:56:24,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-24 23:56:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2023-11-24 23:56:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 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 23:56:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2023-11-24 23:56:24,504 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 10 [2023-11-24 23:56:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:24,504 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2023-11-24 23:56:24,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 23:56:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2023-11-24 23:56:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 23:56:24,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:24,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:24,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:24,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:24,706 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:24,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:24,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1848760725, now seen corresponding path program 1 times [2023-11-24 23:56:24,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:24,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123139423] [2023-11-24 23:56:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:24,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:56:25,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:25,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123139423] [2023-11-24 23:56:25,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123139423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:25,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211652024] [2023-11-24 23:56:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:25,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:25,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:25,525 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:25,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:56:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:26,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 2619 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:56:26,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 23:56:26,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:56:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:56:26,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211652024] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:26,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:56:26,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-24 23:56:26,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515255671] [2023-11-24 23:56:26,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:26,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:26,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:56:26,576 INFO L87 Difference]: Start difference. First operand 18 states and 28 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 23:56:27,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:27,020 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2023-11-24 23:56:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:27,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 12 [2023-11-24 23:56:27,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:27,022 INFO L225 Difference]: With dead ends: 27 [2023-11-24 23:56:27,022 INFO L226 Difference]: Without dead ends: 19 [2023-11-24 23:56:27,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:56:27,023 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:27,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 23:56:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-24 23:56:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-24 23:56:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 23:56:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 29 transitions. [2023-11-24 23:56:27,029 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 29 transitions. Word has length 12 [2023-11-24 23:56:27,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:27,030 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 29 transitions. [2023-11-24 23:56:27,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 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 23:56:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 29 transitions. [2023-11-24 23:56:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 23:56:27,031 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:27,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:27,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:27,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:27,243 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:27,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash -609433948, now seen corresponding path program 1 times [2023-11-24 23:56:27,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:27,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468482102] [2023-11-24 23:56:27,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:27,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:56:28,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:28,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468482102] [2023-11-24 23:56:28,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468482102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:28,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736140213] [2023-11-24 23:56:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:28,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:28,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:28,071 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:28,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:56:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:29,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 2625 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 23:56:29,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 23:56:29,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:56:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:56:29,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736140213] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:29,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 23:56:29,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-24 23:56:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900560270] [2023-11-24 23:56:29,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:56:29,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:56:29,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:56:29,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:56:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:56:29,124 INFO L87 Difference]: Start difference. First operand 19 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 23:56:29,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:56:29,676 INFO L93 Difference]: Finished difference Result 23 states and 33 transitions. [2023-11-24 23:56:29,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:56:29,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2023-11-24 23:56:29,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:56:29,678 INFO L225 Difference]: With dead ends: 23 [2023-11-24 23:56:29,678 INFO L226 Difference]: Without dead ends: 20 [2023-11-24 23:56:29,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 23:56:29,679 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:56:29,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:56:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-24 23:56:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-24 23:56:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 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 23:56:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 30 transitions. [2023-11-24 23:56:29,684 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 30 transitions. Word has length 14 [2023-11-24 23:56:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:56:29,685 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 30 transitions. [2023-11-24 23:56:29,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 23:56:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 30 transitions. [2023-11-24 23:56:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 23:56:29,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:56:29,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 23:56:29,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:56:29,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:29,886 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:56:29,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:56:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1680466798, now seen corresponding path program 1 times [2023-11-24 23:56:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:56:29,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024046645] [2023-11-24 23:56:29,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:29,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:56:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:56:30,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:56:30,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024046645] [2023-11-24 23:56:30,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024046645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:56:30,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037991086] [2023-11-24 23:56:30,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:56:30,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:56:30,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:56:30,650 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:56:30,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99541c63-8406-428d-a0f0-93bf9b956ecc/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 23:56:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:56:31,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 2631 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-24 23:56:31,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:56:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:56:31,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 23:56:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 23:56:31,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037991086] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 23:56:31,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1097102941] [2023-11-24 23:56:31,941 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-24 23:56:31,941 INFO L166 IcfgInterpreter]: Building call graph [2023-11-24 23:56:31,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-24 23:56:31,950 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-24 23:56:31,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs