./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/revcpyswp2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/revcpyswp2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire --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 e5d836305a9654c4a87b407d535438bc329bb78fc0805b3b823600303a7df507 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:14:49,141 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:14:49,213 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:14:49,219 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:14:49,220 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:14:49,248 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:14:49,249 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:14:49,250 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:14:49,251 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:14:49,252 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:14:49,252 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:14:49,253 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:14:49,254 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:14:49,254 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:14:49,255 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:14:49,256 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:14:49,256 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:14:49,257 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:14:49,257 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:14:49,258 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:14:49,259 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:14:49,260 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:14:49,260 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:14:49,261 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:14:49,262 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:14:49,262 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:14:49,263 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:14:49,263 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:14:49,264 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:14:49,264 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:14:49,265 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:14:49,265 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:14:49,266 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:14:49,266 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:14:49,266 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:14:49,267 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:14:49,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:14:49,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:14:49,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:14:49,268 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:14:49,268 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:14:49,269 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:14:49,269 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:14:49,270 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:14:49,270 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:14:49,270 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:14:49,271 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:14:49,271 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_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5d836305a9654c4a87b407d535438bc329bb78fc0805b3b823600303a7df507 [2023-11-23 21:14:49,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:14:49,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:14:49,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:14:49,618 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:14:49,618 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:14:49,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/array-tiling/revcpyswp2.c [2023-11-23 21:14:52,923 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:14:53,135 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:14:53,136 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/sv-benchmarks/c/array-tiling/revcpyswp2.c [2023-11-23 21:14:53,146 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/data/527643f94/c5634f1b78104ef1bdc8f09a4aee2072/FLAG8fc7f390d [2023-11-23 21:14:53,169 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/data/527643f94/c5634f1b78104ef1bdc8f09a4aee2072 [2023-11-23 21:14:53,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:14:53,175 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:14:53,176 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:14:53,177 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:14:53,184 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:14:53,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,186 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6baab366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53, skipping insertion in model container [2023-11-23 21:14:53,186 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,216 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:14:53,389 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_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/sv-benchmarks/c/array-tiling/revcpyswp2.c[432,445] [2023-11-23 21:14:53,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:14:53,425 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:14:53,436 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_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/sv-benchmarks/c/array-tiling/revcpyswp2.c[432,445] [2023-11-23 21:14:53,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:14:53,465 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:14:53,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53 WrapperNode [2023-11-23 21:14:53,466 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:14:53,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:14:53,467 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:14:53,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:14:53,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,485 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,511 INFO L138 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 111 [2023-11-23 21:14:53,511 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:14:53,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:14:53,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:14:53,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:14:53,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,527 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,527 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,535 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,539 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,540 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,542 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:14:53,545 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:14:53,545 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:14:53,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:14:53,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (1/1) ... [2023-11-23 21:14:53,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:14:53,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:53,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:14:53,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:14:53,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:14:53,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:14:53,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:14:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:14:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:14:53,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:14:53,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:14:53,704 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:14:53,707 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:14:53,924 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:14:53,980 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:14:53,980 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-23 21:14:53,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:14:53 BoogieIcfgContainer [2023-11-23 21:14:53,982 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:14:53,985 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:14:53,985 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:14:53,989 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:14:53,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:14:53" (1/3) ... [2023-11-23 21:14:53,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1771e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:14:53, skipping insertion in model container [2023-11-23 21:14:53,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:14:53" (2/3) ... [2023-11-23 21:14:53,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1771e61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:14:53, skipping insertion in model container [2023-11-23 21:14:53,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:14:53" (3/3) ... [2023-11-23 21:14:53,992 INFO L112 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2023-11-23 21:14:54,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:14:54,014 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:14:54,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:14:54,069 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;@7ddc9e3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:14:54,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:14:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:14:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:14:54,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:54,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:54,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:54,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:54,085 INFO L85 PathProgramCache]: Analyzing trace with hash -808186464, now seen corresponding path program 1 times [2023-11-23 21:14:54,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:54,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789698171] [2023-11-23 21:14:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:54,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:14:54,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:54,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789698171] [2023-11-23 21:14:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789698171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:54,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:54,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:14:54,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755804187] [2023-11-23 21:14:54,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:54,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:14:54,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:14:54,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:54,553 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 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) [2023-11-23 21:14:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:54,618 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2023-11-23 21:14:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:14:54,622 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 [2023-11-23 21:14:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:54,630 INFO L225 Difference]: With dead ends: 24 [2023-11-23 21:14:54,630 INFO L226 Difference]: Without dead ends: 12 [2023-11-23 21:14:54,633 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 [2023-11-23 21:14:54,637 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:54,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:14:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-23 21:14:54,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-23 21:14:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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) [2023-11-23 21:14:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-11-23 21:14:54,672 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2023-11-23 21:14:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:54,673 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-11-23 21:14:54,673 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) [2023-11-23 21:14:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-11-23 21:14:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:14:54,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:54,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:54,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:14:54,675 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:54,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:54,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1284334477, now seen corresponding path program 1 times [2023-11-23 21:14:54,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:54,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798052090] [2023-11-23 21:14:54,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:54,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:14:54,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:54,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798052090] [2023-11-23 21:14:54,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798052090] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:54,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:54,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:14:54,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704635048] [2023-11-23 21:14:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:54,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:14:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:54,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:14:54,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:14:54,880 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2023-11-23 21:14:54,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:54,925 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2023-11-23 21:14:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:14:54,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2023-11-23 21:14:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:54,927 INFO L225 Difference]: With dead ends: 27 [2023-11-23 21:14:54,927 INFO L226 Difference]: Without dead ends: 20 [2023-11-23 21:14:54,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:14:54,929 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:54,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 7 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:14:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-23 21:14:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2023-11-23 21:14:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:14:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-11-23 21:14:54,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2023-11-23 21:14:54,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:54,937 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-11-23 21:14:54,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2023-11-23 21:14:54,938 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-11-23 21:14:54,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:14:54,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:54,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:54,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:14:54,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:54,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:54,940 INFO L85 PathProgramCache]: Analyzing trace with hash 656114818, now seen corresponding path program 1 times [2023-11-23 21:14:54,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:54,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241395467] [2023-11-23 21:14:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:54,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:14:55,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:55,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241395467] [2023-11-23 21:14:55,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241395467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:55,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032793952] [2023-11-23 21:14:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:55,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:55,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:55,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:55,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:14:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:55,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:14:55,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:14:55,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:14:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 21:14:55,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032793952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:14:55,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [842519496] [2023-11-23 21:14:55,373 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 21:14:55,374 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:14:55,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:14:55,384 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:14:55,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:15:03,305 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:15:03,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '218#(and (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|)) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem22#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (- 4))) |ULTIMATE.start_main_#t~mem23#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-23 21:15:03,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:15:03,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:15:03,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 21:15:03,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150932077] [2023-11-23 21:15:03,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:15:03,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:15:03,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:03,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:15:03,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:15:03,900 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2023-11-23 21:15:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:04,061 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2023-11-23 21:15:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:15:04,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) Word has length 13 [2023-11-23 21:15:04,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:04,063 INFO L225 Difference]: With dead ends: 27 [2023-11-23 21:15:04,063 INFO L226 Difference]: Without dead ends: 16 [2023-11-23 21:15:04,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:15:04,065 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:04,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:15:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-23 21:15:04,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-23 21:15:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 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) [2023-11-23 21:15:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-23 21:15:04,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 13 [2023-11-23 21:15:04,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:04,074 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-23 21:15:04,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2023-11-23 21:15:04,075 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-23 21:15:04,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 21:15:04,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:04,076 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:04,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:04,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:04,297 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:04,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:04,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1512971247, now seen corresponding path program 2 times [2023-11-23 21:15:04,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:04,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447926148] [2023-11-23 21:15:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:04,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:15:04,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:04,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447926148] [2023-11-23 21:15:04,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447926148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:04,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141273123] [2023-11-23 21:15:04,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:15:04,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:04,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:04,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:04,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:15:04,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 21:15:04,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:15:04,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:15:04,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:15:04,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:15:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:15:04,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141273123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:15:04,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290703082] [2023-11-23 21:15:04,914 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 21:15:04,915 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:15:04,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:15:04,915 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:15:04,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:15:05,573 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:15:06,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '380#(and (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|)) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem22#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (- 4))) |ULTIMATE.start_main_#t~mem23#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-23 21:15:06,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:15:06,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:15:06,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-23 21:15:06,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734396035] [2023-11-23 21:15:06,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:15:06,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:15:06,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:06,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:15:06,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-23 21:15:06,189 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2023-11-23 21:15:06,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:06,419 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-11-23 21:15:06,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:15:06,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) Word has length 14 [2023-11-23 21:15:06,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:06,420 INFO L225 Difference]: With dead ends: 38 [2023-11-23 21:15:06,420 INFO L226 Difference]: Without dead ends: 29 [2023-11-23 21:15:06,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:15:06,422 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:06,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 16 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:15:06,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-23 21:15:06,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2023-11-23 21:15:06,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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) [2023-11-23 21:15:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-23 21:15:06,434 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2023-11-23 21:15:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:06,434 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-23 21:15:06,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 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) [2023-11-23 21:15:06,435 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-23 21:15:06,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:15:06,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:06,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:06,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:06,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:06,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:06,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:06,658 INFO L85 PathProgramCache]: Analyzing trace with hash -388489824, now seen corresponding path program 3 times [2023-11-23 21:15:06,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:06,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794042102] [2023-11-23 21:15:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:06,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:06,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:15:10,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:10,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794042102] [2023-11-23 21:15:10,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794042102] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:10,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486939256] [2023-11-23 21:15:10,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:15:10,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:10,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:10,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:10,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:15:10,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:15:10,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:15:10,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-23 21:15:10,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:10,522 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-11-23 21:15:10,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2023-11-23 21:15:10,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-11-23 21:15:10,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:15:11,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 28 [2023-11-23 21:15:11,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2023-11-23 21:15:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:15:11,561 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 21:15:11,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 55 [2023-11-23 21:15:11,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2023-11-23 21:15:12,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 73 [2023-11-23 21:15:12,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:15:12,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2023-11-23 21:15:12,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:15:12,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 76 [2023-11-23 21:15:12,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 71 [2023-11-23 21:15:12,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-23 21:15:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:15:12,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-23 21:15:12,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 21:15:12,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 35 [2023-11-23 21:15:12,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2023-11-23 21:15:12,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-11-23 21:15:13,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:15:13,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2023-11-23 21:15:13,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-23 21:15:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:15:13,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:15:14,013 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_225 Int) (v_ArrVal_227 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_225)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_227))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0)))))) is different from false [2023-11-23 21:15:14,066 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_225 Int) (v_ArrVal_227 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_138| Int) (v_ArrVal_224 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~i~0#1_138| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_138| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_225)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_227))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0))) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2023-11-23 21:15:14,100 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_225 Int) (v_ArrVal_227 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_138| Int) (v_ArrVal_224 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~i~0#1_138| 1) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_138| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_225)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_227))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0))))))) is different from false [2023-11-23 21:15:14,652 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_216 (Array Int Int)) (v_ArrVal_225 Int) (v_ArrVal_227 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_138| Int) (v_ArrVal_221 Int) (|v_ULTIMATE.start_main_~i~0#1_140| Int) (v_ArrVal_219 Int) (v_ArrVal_215 Int) (v_ArrVal_224 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~i~0#1_140| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse3 (let ((.cse7 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse5 .cse6 v_ArrVal_215)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse7 |c_ULTIMATE.start_main_~b~0#1.offset|) (select .cse5 .cse6))))) (.cse4 (* |v_ULTIMATE.start_main_~i~0#1_140| 4))) (let ((.cse1 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_216) |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_221))) (let ((.cse2 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_219))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_138| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_225)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_227))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0))) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< |v_ULTIMATE.start_main_~i~0#1_138| 1))) is different from false [2023-11-23 21:15:14,714 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_216 (Array Int Int)) (v_ArrVal_225 Int) (v_ArrVal_227 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_138| Int) (v_ArrVal_221 Int) (|v_ULTIMATE.start_main_~i~0#1_140| Int) (v_ArrVal_219 Int) (v_ArrVal_215 Int) (v_ArrVal_224 (Array Int Int))) (or (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse3 (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~a~0#1.offset| v_ArrVal_215)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (.cse4 (* |v_ULTIMATE.start_main_~i~0#1_140| 4))) (let ((.cse1 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_216) |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_221))) (let ((.cse2 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse4 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_219))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~b~0#1.base| .cse2) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_138| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_225)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_227))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| (- 4) (* 4 c_~SIZE~0))))) (< |v_ULTIMATE.start_main_~i~0#1_140| 1) (< |v_ULTIMATE.start_main_~i~0#1_138| 1))) is different from false [2023-11-23 21:15:15,952 WARN L854 $PredicateComparison]: unable to prove that (forall ((~SIZE~0 Int)) (or (< |c_ULTIMATE.start_main_~i~0#1| ~SIZE~0) (forall ((|v_ULTIMATE.start_main_~i~0#1_140| Int) (v_ArrVal_219 Int) (v_ArrVal_211 (Array Int Int)) (v_ArrVal_213 (Array Int Int)) (v_ArrVal_215 Int) (v_ArrVal_224 (Array Int Int)) (v_ArrVal_216 (Array Int Int)) (v_ArrVal_225 Int) (v_ArrVal_227 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_138| Int) (v_ArrVal_221 Int) (|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_140| 1) (< |v_ULTIMATE.start_main_~i~0#1_138| 1) (< |v_ULTIMATE.start_main_~i~0#1_142| 1) (< ~SIZE~0 (+ |v_ULTIMATE.start_main_~i~0#1_142| 1)) (let ((.cse8 (* ~SIZE~0 4))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| .cse8 (- 4)))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse4 (let ((.cse6 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse7 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a_copy~0#1.base|) .cse1))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_211))) (store (select .cse7 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_142| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select .cse7 |c_ULTIMATE.start_main_~a_copy~0#1.base|) (+ |c_ULTIMATE.start_main_~a_copy~0#1.offset| .cse8 (* (- 4) |v_ULTIMATE.start_main_~i~0#1_142|) (- 4)))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_213) |c_ULTIMATE.start_main_~a~0#1.base|))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_213) |c_ULTIMATE.start_main_~a~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| v_ArrVal_215)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (.cse5 (* |v_ULTIMATE.start_main_~i~0#1_140| 4))) (let ((.cse2 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_216) |c_ULTIMATE.start_main_~b~0#1.base| .cse4) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_221))) (let ((.cse3 (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse4) |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse5 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_219))) (store (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_138| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_225)) |c_ULTIMATE.start_main_~b~0#1.base| v_ArrVal_227))) (= (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a_copy~0#1.base|) .cse1))))))))) is different from false [2023-11-23 21:15:16,034 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:15:16,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 4264 treesize of output 2285 [2023-11-23 21:15:22,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:15:22,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37371126 treesize of output 35851774 [2023-11-23 21:15:23,432 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 21:15:23,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2302 treesize of output 2116 [2023-11-23 21:15:23,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8447 treesize of output 8279 [2023-11-23 21:15:23,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1369 treesize of output 1355 [2023-11-23 21:15:23,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:15:23,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1714 treesize of output 1624 [2023-11-23 21:15:23,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 226 [2023-11-23 21:15:25,480 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:15:25,526 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:15:25,563 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:15:25,612 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:15:25,630 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:15:25,655 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:15:25,682 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:15:25,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 188 [2023-11-23 21:15:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 10 not checked. [2023-11-23 21:15:26,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486939256] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:15:26,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446246578] [2023-11-23 21:15:26,356 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 21:15:26,357 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:15:26,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:15:26,357 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:15:26,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:15:26,866 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:15:28,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '618#(and (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_#t~mem23#1| |ULTIMATE.start_main_#t~mem22#1|)) (<= 1 ~SIZE~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |ULTIMATE.start_main_~a~0#1.offset|) |ULTIMATE.start_main_#t~mem22#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a_copy~0#1.base|) (+ (* ~SIZE~0 4) |ULTIMATE.start_main_~a_copy~0#1.offset| (- 4))) |ULTIMATE.start_main_#t~mem23#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-23 21:15:28,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:15:28,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:15:28,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 43 [2023-11-23 21:15:28,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989367106] [2023-11-23 21:15:28,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:15:28,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-23 21:15:28,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:15:28,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-23 21:15:28,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1640, Unknown=14, NotChecked=534, Total=2450 [2023-11-23 21:15:28,278 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 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) [2023-11-23 21:15:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:15:40,880 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2023-11-23 21:15:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-23 21:15:40,881 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-23 21:15:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:15:40,885 INFO L225 Difference]: With dead ends: 123 [2023-11-23 21:15:40,885 INFO L226 Difference]: Without dead ends: 121 [2023-11-23 21:15:40,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=1211, Invalid=7159, Unknown=26, NotChecked=1110, Total=9506 [2023-11-23 21:15:40,891 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 207 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 181 mSolverCounterUnsat, 62 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 62 IncrementalHoareTripleChecker+Unknown, 785 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:15:40,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 177 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 557 Invalid, 62 Unknown, 785 Unchecked, 2.9s Time] [2023-11-23 21:15:40,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-23 21:15:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 36. [2023-11-23 21:15:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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) [2023-11-23 21:15:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-11-23 21:15:40,914 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 17 [2023-11-23 21:15:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:15:40,915 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-11-23 21:15:40,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 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) [2023-11-23 21:15:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-11-23 21:15:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:15:40,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:15:40,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:15:40,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:15:41,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:41,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:15:41,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:15:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash 485994917, now seen corresponding path program 4 times [2023-11-23 21:15:41,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:15:41,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519486722] [2023-11-23 21:15:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:15:41,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:15:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:15:41,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:15:41,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519486722] [2023-11-23 21:15:41,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519486722] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:15:41,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228554597] [2023-11-23 21:15:41,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:15:41,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:15:41,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:15:41,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:15:41,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ecda4b9-ed55-40b5-812f-ec8fc9f1bef4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:15:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:15:41,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:15:41,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:15:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:15:41,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:15:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:15:42,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228554597] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:15:42,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987130490] [2023-11-23 21:15:42,099 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 21:15:42,100 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:15:42,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:15:42,100 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:15:42,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:15:47,037 INFO L180 IcfgInterpreter]: Interpretation finished