./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/vnew1.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_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/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_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/vnew1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/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_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/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 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:31:31,082 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:31:31,222 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:31:31,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:31:31,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:31:31,289 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:31:31,290 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:31:31,290 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:31:31,291 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:31:31,297 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:31:31,298 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:31:31,298 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:31:31,299 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:31:31,300 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:31:31,301 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:31:31,301 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:31:31,302 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:31:31,302 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:31:31,303 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:31:31,303 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:31:31,304 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:31:31,304 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:31:31,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:31:31,306 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:31:31,306 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:31:31,307 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:31:31,307 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:31:31,308 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:31:31,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:31:31,309 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:31:31,310 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:31:31,310 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:31:31,311 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:31:31,311 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:31:31,311 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:31:31,312 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:31:31,312 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:31:31,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:31,319 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:31:31,320 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:31:31,320 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:31:31,320 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:31:31,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:31:31,321 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:31:31,322 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:31:31,322 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:31:31,322 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:31:31,322 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_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 [2023-11-23 21:31:31,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:31:31,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:31:31,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:31:31,693 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:31:31,694 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:31:31,696 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/loops-crafted-1/vnew1.c [2023-11-23 21:31:34,770 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:31:35,122 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:31:35,123 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/sv-benchmarks/c/loops-crafted-1/vnew1.c [2023-11-23 21:31:35,131 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/data/f23ca7a75/ad24711748cf4021b1609f547774b073/FLAGc54817318 [2023-11-23 21:31:35,149 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/data/f23ca7a75/ad24711748cf4021b1609f547774b073 [2023-11-23 21:31:35,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:31:35,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:31:35,166 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:35,166 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:31:35,173 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:31:35,174 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,175 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1917513f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35, skipping insertion in model container [2023-11-23 21:31:35,176 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,202 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:35,388 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_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2023-11-23 21:31:35,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:35,417 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:31:35,430 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_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2023-11-23 21:31:35,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:35,450 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:31:35,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35 WrapperNode [2023-11-23 21:31:35,451 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:35,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:35,453 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:31:35,453 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:31:35,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,475 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,502 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2023-11-23 21:31:35,503 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:35,504 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:31:35,504 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:31:35,504 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:31:35,514 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,521 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,522 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,525 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,528 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,530 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,531 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,532 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:31:35,534 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:31:35,534 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:31:35,534 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:31:35,535 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (1/1) ... [2023-11-23 21:31:35,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:35,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:35,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:31:35,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:31:35,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:31:35,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:31:35,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:31:35,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:31:35,681 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:31:35,684 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:31:35,828 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:31:35,874 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:31:35,875 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:31:35,876 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:35 BoogieIcfgContainer [2023-11-23 21:31:35,877 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:31:35,879 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:31:35,880 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:31:35,884 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:31:35,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:31:35" (1/3) ... [2023-11-23 21:31:35,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f41bcfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:35, skipping insertion in model container [2023-11-23 21:31:35,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:35" (2/3) ... [2023-11-23 21:31:35,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f41bcfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:35, skipping insertion in model container [2023-11-23 21:31:35,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:35" (3/3) ... [2023-11-23 21:31:35,887 INFO L112 eAbstractionObserver]: Analyzing ICFG vnew1.c [2023-11-23 21:31:35,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:31:35,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:31:35,990 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:31:36,000 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;@75de3264, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:31:36,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:31:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:31:36,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:36,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:31:36,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:36,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2025251484, now seen corresponding path program 1 times [2023-11-23 21:31:36,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:36,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785825137] [2023-11-23 21:31:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:36,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:36,890 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 21:31:36,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:36,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785825137] [2023-11-23 21:31:36,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785825137] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:36,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:36,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:31:36,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060296838] [2023-11-23 21:31:36,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:36,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:31:36,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:36,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:31:36,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:31:36,960 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 21:31:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:37,182 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2023-11-23 21:31:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:31:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 21:31:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:37,194 INFO L225 Difference]: With dead ends: 22 [2023-11-23 21:31:37,194 INFO L226 Difference]: Without dead ends: 12 [2023-11-23 21:31:37,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:31:37,210 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:37,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 9 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-23 21:31:37,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2023-11-23 21:31:37,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:37,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-11-23 21:31:37,252 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 6 [2023-11-23 21:31:37,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:37,254 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-11-23 21:31:37,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 21:31:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-11-23 21:31:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:31:37,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:37,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:37,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:31:37,258 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:37,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:37,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1610042692, now seen corresponding path program 1 times [2023-11-23 21:31:37,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:37,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836421887] [2023-11-23 21:31:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:37,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:37,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:37,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836421887] [2023-11-23 21:31:37,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836421887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:37,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130388684] [2023-11-23 21:31:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:37,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:37,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:37,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:37,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:31:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:37,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:31:37,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:38,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:38,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130388684] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:38,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [415824052] [2023-11-23 21:31:38,915 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:31:38,915 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:38,919 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:38,925 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:38,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:39,265 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:31:39,624 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '118#(and (<= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~i~0#1| 4294967296)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 1 (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 0))' at error location [2023-11-23 21:31:39,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:31:39,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:39,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-23 21:31:39,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237064726] [2023-11-23 21:31:39,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:39,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:31:39,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:39,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:31:39,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:31:39,629 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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 21:31:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:40,157 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2023-11-23 21:31:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 21:31:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) Word has length 7 [2023-11-23 21:31:40,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:40,159 INFO L225 Difference]: With dead ends: 29 [2023-11-23 21:31:40,160 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 21:31:40,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:31:40,162 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:40,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 12 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:31:40,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 21:31:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2023-11-23 21:31:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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 21:31:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-23 21:31:40,174 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 7 [2023-11-23 21:31:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:40,175 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-23 21:31:40,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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 21:31:40,175 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-23 21:31:40,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:31:40,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:40,176 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:40,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:31:40,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:40,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:40,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:40,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1497765220, now seen corresponding path program 2 times [2023-11-23 21:31:40,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:40,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746016711] [2023-11-23 21:31:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:40,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:40,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:40,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746016711] [2023-11-23 21:31:40,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746016711] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:40,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114320576] [2023-11-23 21:31:40,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:31:40,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:40,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:40,733 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:40,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:31:40,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:31:40,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:40,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 21:31:40,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:41,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:41,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114320576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:41,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1110846559] [2023-11-23 21:31:41,319 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-23 21:31:41,320 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:41,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:41,320 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:41,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:41,526 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:31:41,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '284#(and (<= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~i~0#1| 4294967296)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 1 (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 0))' at error location [2023-11-23 21:31:41,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:31:41,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:41,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-23 21:31:41,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913789664] [2023-11-23 21:31:41,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:41,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:31:41,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:41,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:31:41,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-11-23 21:31:41,977 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:44,871 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2023-11-23 21:31:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-23 21:31:44,872 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-23 21:31:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:44,873 INFO L225 Difference]: With dead ends: 68 [2023-11-23 21:31:44,873 INFO L226 Difference]: Without dead ends: 66 [2023-11-23 21:31:44,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=561, Invalid=2301, Unknown=0, NotChecked=0, Total=2862 [2023-11-23 21:31:44,877 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 160 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:44,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 42 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:31:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-23 21:31:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 27. [2023-11-23 21:31:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2023-11-23 21:31:44,897 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 10 [2023-11-23 21:31:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:44,898 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2023-11-23 21:31:44,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:44,899 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2023-11-23 21:31:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:31:44,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:44,900 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:44,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 21:31:45,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:45,107 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:45,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:45,107 INFO L85 PathProgramCache]: Analyzing trace with hash 913971418, now seen corresponding path program 1 times [2023-11-23 21:31:45,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:45,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855312704] [2023-11-23 21:31:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:45,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:45,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:45,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855312704] [2023-11-23 21:31:45,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855312704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:45,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435616002] [2023-11-23 21:31:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:45,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:45,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:45,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:45,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:31:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:45,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:31:45,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:45,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:46,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435616002] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:46,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002852637] [2023-11-23 21:31:46,254 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-23 21:31:46,255 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:46,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:46,257 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:46,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:46,552 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:31:46,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '572#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ (mod |ULTIMATE.start_main_~j~0#1| 4294967296) 1) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 0))' at error location [2023-11-23 21:31:46,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:31:46,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:46,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-23 21:31:46,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351814544] [2023-11-23 21:31:46,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:46,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:31:46,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:46,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:31:46,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-11-23 21:31:46,994 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 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 21:31:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:49,086 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2023-11-23 21:31:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-23 21:31:49,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-23 21:31:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:49,088 INFO L225 Difference]: With dead ends: 76 [2023-11-23 21:31:49,088 INFO L226 Difference]: Without dead ends: 74 [2023-11-23 21:31:49,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=572, Invalid=2620, Unknown=0, NotChecked=0, Total=3192 [2023-11-23 21:31:49,093 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 161 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:49,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 36 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:31:49,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-23 21:31:49,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 30. [2023-11-23 21:31:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 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 21:31:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 42 transitions. [2023-11-23 21:31:49,143 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 42 transitions. Word has length 12 [2023-11-23 21:31:49,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:49,143 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 42 transitions. [2023-11-23 21:31:49,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 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 21:31:49,144 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 42 transitions. [2023-11-23 21:31:49,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:31:49,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:49,145 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:49,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:49,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:49,369 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:49,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:49,369 INFO L85 PathProgramCache]: Analyzing trace with hash 269819268, now seen corresponding path program 2 times [2023-11-23 21:31:49,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:49,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127688774] [2023-11-23 21:31:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:49,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:49,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:49,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127688774] [2023-11-23 21:31:49,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127688774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:49,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147324518] [2023-11-23 21:31:49,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:31:49,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:49,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:49,895 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:49,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:31:49,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:31:49,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:49,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 21:31:49,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:50,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:31:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147324518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:31:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1050424086] [2023-11-23 21:31:50,509 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-23 21:31:50,509 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:31:50,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:31:50,510 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:31:50,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:31:50,791 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:31:51,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '888#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= (+ (mod |ULTIMATE.start_main_~j~0#1| 4294967296) 1) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (mod |ULTIMATE.start_main_~k~0#1| 4294967296) 0))' at error location [2023-11-23 21:31:51,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:31:51,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:31:51,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 21 [2023-11-23 21:31:51,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348901936] [2023-11-23 21:31:51,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:31:51,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 21:31:51,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:51,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 21:31:51,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2023-11-23 21:31:51,301 INFO L87 Difference]: Start difference. First operand 30 states and 42 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 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 21:31:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:31:52,278 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2023-11-23 21:31:52,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:31:52,280 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 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 21:31:52,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:31:52,280 INFO L225 Difference]: With dead ends: 54 [2023-11-23 21:31:52,281 INFO L226 Difference]: Without dead ends: 30 [2023-11-23 21:31:52,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:31:52,282 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 42 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:31:52,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:31:52,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-23 21:31:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-23 21:31:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:31:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-11-23 21:31:52,319 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 13 [2023-11-23 21:31:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:31:52,319 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-11-23 21:31:52,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 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 21:31:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-11-23 21:31:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:31:52,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:52,321 INFO L195 NwaCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:31:52,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:31:52,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:52,535 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:52,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:52,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1529016102, now seen corresponding path program 3 times [2023-11-23 21:31:52,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:52,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646240315] [2023-11-23 21:31:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:52,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:54,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646240315] [2023-11-23 21:31:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646240315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:31:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374095039] [2023-11-23 21:31:54,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:31:54,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:31:54,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:54,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:31:54,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b1bf92a-034c-4f93-b7e3-46f7c149eb55/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:31:54,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:31:54,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:31:54,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 21:31:54,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:31:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:31:55,552 INFO L327 TraceCheckSpWp]: Computing backward predicates...