./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/n.c24.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ --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 ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:48:12,162 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:48:12,265 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:48:12,276 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:48:12,277 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:48:12,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:48:12,321 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:48:12,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:48:12,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:48:12,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:48:12,330 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:48:12,332 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:48:12,332 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:48:12,334 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:48:12,334 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:48:12,335 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:48:12,335 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:48:12,336 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:48:12,336 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:48:12,337 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:48:12,337 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:48:12,338 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:48:12,339 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:48:12,339 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:48:12,340 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:48:12,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:48:12,341 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:48:12,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:48:12,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:48:12,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:48:12,343 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:48:12,343 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:48:12,344 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:48:12,344 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:48:12,344 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:48:12,345 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:48:12,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:12,345 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:48:12,345 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:48:12,346 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:48:12,346 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:48:12,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:48:12,347 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:48:12,347 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:48:12,347 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:48:12,348 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_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2f22c8c94593047c07aca289bcba7e507bc3ee948a7529dc94c8d7792bd95d [2023-11-19 04:48:12,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:48:12,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:48:12,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:48:12,692 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:48:12,692 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:48:12,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/loops/n.c24.i [2023-11-19 04:48:15,840 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:48:16,201 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:48:16,201 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/sv-benchmarks/c/loops/n.c24.i [2023-11-19 04:48:16,214 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/data/ad14d7b6b/aa60ed03022243c59f97f73ab35334fc/FLAGbaba787ee [2023-11-19 04:48:16,495 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/data/ad14d7b6b/aa60ed03022243c59f97f73ab35334fc [2023-11-19 04:48:16,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:48:16,507 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:48:16,509 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:16,510 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:48:16,516 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:48:16,516 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:16,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a155af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16, skipping insertion in model container [2023-11-19 04:48:16,519 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:16,564 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:48:16,743 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_cd428feb-0d9d-42a9-8915-4c14361cbf82/sv-benchmarks/c/loops/n.c24.i[805,818] [2023-11-19 04:48:16,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:16,821 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:48:16,834 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_cd428feb-0d9d-42a9-8915-4c14361cbf82/sv-benchmarks/c/loops/n.c24.i[805,818] [2023-11-19 04:48:16,855 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:16,889 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:48:16,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16 WrapperNode [2023-11-19 04:48:16,890 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:16,892 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:16,892 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:48:16,892 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:48:16,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:16,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:16,960 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 158 [2023-11-19 04:48:16,961 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:16,961 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:48:16,962 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:48:16,962 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:48:16,971 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:16,971 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:16,974 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:16,975 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:16,983 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:17,001 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:17,003 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:17,014 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:17,017 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:48:17,018 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:48:17,018 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:48:17,018 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:48:17,019 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (1/1) ... [2023-11-19 04:48:17,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:17,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:17,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:48:17,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:48:17,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:48:17,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 04:48:17,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:48:17,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:48:17,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:48:17,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:48:17,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:48:17,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 04:48:17,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:48:17,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:48:17,209 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:48:17,212 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:48:17,540 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:48:17,610 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:48:17,610 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 04:48:17,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:17 BoogieIcfgContainer [2023-11-19 04:48:17,622 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:48:17,624 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:48:17,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:48:17,630 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:48:17,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:48:16" (1/3) ... [2023-11-19 04:48:17,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1336d21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:17, skipping insertion in model container [2023-11-19 04:48:17,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:16" (2/3) ... [2023-11-19 04:48:17,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1336d21c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:17, skipping insertion in model container [2023-11-19 04:48:17,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:17" (3/3) ... [2023-11-19 04:48:17,637 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2023-11-19 04:48:17,653 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:48:17,653 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:48:17,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:48:17,717 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;@48db4dce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:48:17,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:48:17,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 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) [2023-11-19 04:48:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 04:48:17,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:17,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 04:48:17,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:17,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:17,736 INFO L85 PathProgramCache]: Analyzing trace with hash 155979844, now seen corresponding path program 1 times [2023-11-19 04:48:17,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:17,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20707614] [2023-11-19 04:48:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:17,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:48:17,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:17,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20707614] [2023-11-19 04:48:17,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20707614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:17,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:17,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 04:48:18,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183958975] [2023-11-19 04:48:18,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:18,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:18,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:18,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:18,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:18,062 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:18,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:18,143 INFO L93 Difference]: Finished difference Result 58 states and 93 transitions. [2023-11-19 04:48:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:18,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-19 04:48:18,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:18,165 INFO L225 Difference]: With dead ends: 58 [2023-11-19 04:48:18,165 INFO L226 Difference]: Without dead ends: 34 [2023-11-19 04:48:18,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:18,172 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:18,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-19 04:48:18,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 21. [2023-11-19 04:48:18,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2023-11-19 04:48:18,213 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 5 [2023-11-19 04:48:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:18,214 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2023-11-19 04:48:18,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2023-11-19 04:48:18,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:48:18,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:18,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:18,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:48:18,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:18,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1723060144, now seen corresponding path program 1 times [2023-11-19 04:48:18,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:18,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510117335] [2023-11-19 04:48:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:18,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:18,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:48:18,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:18,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510117335] [2023-11-19 04:48:18,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510117335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:18,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824024089] [2023-11-19 04:48:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:18,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:18,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:18,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:18,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:48:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:18,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:48:18,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:48:18,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:48:18,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824024089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:18,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1772753159] [2023-11-19 04:48:18,578 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-19 04:48:18,578 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:18,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:18,588 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:18,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:19,308 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:19,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-19 04:48:19,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:19,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:48:19,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 04:48:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993041951] [2023-11-19 04:48:19,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:19,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:48:19,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:19,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:48:19,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:48:19,557 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2023-11-19 04:48:19,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:19,687 INFO L93 Difference]: Finished difference Result 84 states and 121 transitions. [2023-11-19 04:48:19,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:48:19,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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 [2023-11-19 04:48:19,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:19,691 INFO L225 Difference]: With dead ends: 84 [2023-11-19 04:48:19,691 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 04:48:19,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:48:19,695 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:19,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 62 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 04:48:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-19 04:48:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.4) internal successors, (91), 65 states have internal predecessors, (91), 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) [2023-11-19 04:48:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 91 transitions. [2023-11-19 04:48:19,721 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 91 transitions. Word has length 10 [2023-11-19 04:48:19,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:19,721 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 91 transitions. [2023-11-19 04:48:19,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2023-11-19 04:48:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 91 transitions. [2023-11-19 04:48:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 04:48:19,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:19,724 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-19 04:48:19,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:19,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:19,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:19,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1970359796, now seen corresponding path program 2 times [2023-11-19 04:48:19,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:19,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038223358] [2023-11-19 04:48:19,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:19,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 04:48:20,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:20,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038223358] [2023-11-19 04:48:20,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038223358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:20,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:20,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:48:20,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322853153] [2023-11-19 04:48:20,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:20,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:48:20,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:20,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:48:20,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:48:20,285 INFO L87 Difference]: Start difference. First operand 66 states and 91 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 04:48:20,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:20,366 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2023-11-19 04:48:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:48:20,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 25 [2023-11-19 04:48:20,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:20,374 INFO L225 Difference]: With dead ends: 123 [2023-11-19 04:48:20,374 INFO L226 Difference]: Without dead ends: 120 [2023-11-19 04:48:20,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:48:20,378 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:20,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:48:20,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-19 04:48:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 67. [2023-11-19 04:48:20,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 66 states have internal predecessors, (93), 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) [2023-11-19 04:48:20,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2023-11-19 04:48:20,397 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 25 [2023-11-19 04:48:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:20,397 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2023-11-19 04:48:20,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-11-19 04:48:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2023-11-19 04:48:20,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 04:48:20,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:20,400 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:20,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:48:20,400 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:20,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:20,401 INFO L85 PathProgramCache]: Analyzing trace with hash -635862831, now seen corresponding path program 1 times [2023-11-19 04:48:20,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:20,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765098343] [2023-11-19 04:48:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:20,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:48:20,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765098343] [2023-11-19 04:48:20,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765098343] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:20,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972526491] [2023-11-19 04:48:20,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:20,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:20,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:20,581 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:20,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:48:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:20,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:48:20,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:48:20,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:48:20,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972526491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:20,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [387764425] [2023-11-19 04:48:20,770 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 04:48:20,770 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:20,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:20,771 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:20,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:21,924 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:22,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '857#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-19 04:48:22,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:22,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:48:22,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 04:48:22,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178623040] [2023-11-19 04:48:22,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:22,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 04:48:22,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:22,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 04:48:22,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-11-19 04:48:22,486 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2023-11-19 04:48:22,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:22,697 INFO L93 Difference]: Finished difference Result 231 states and 336 transitions. [2023-11-19 04:48:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:48:22,700 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) Word has length 29 [2023-11-19 04:48:22,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:22,704 INFO L225 Difference]: With dead ends: 231 [2023-11-19 04:48:22,704 INFO L226 Difference]: Without dead ends: 170 [2023-11-19 04:48:22,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2023-11-19 04:48:22,707 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 361 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:22,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 151 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:48:22,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-19 04:48:22,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 157. [2023-11-19 04:48:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.4038461538461537) internal successors, (219), 156 states have internal predecessors, (219), 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) [2023-11-19 04:48:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 219 transitions. [2023-11-19 04:48:22,749 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 219 transitions. Word has length 29 [2023-11-19 04:48:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:22,750 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 219 transitions. [2023-11-19 04:48:22,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 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) [2023-11-19 04:48:22,750 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 219 transitions. [2023-11-19 04:48:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 04:48:22,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:22,753 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:48:22,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:22,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:22,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:22,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:22,968 INFO L85 PathProgramCache]: Analyzing trace with hash 766719869, now seen corresponding path program 2 times [2023-11-19 04:48:22,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:22,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142591790] [2023-11-19 04:48:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:22,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-19 04:48:23,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:23,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142591790] [2023-11-19 04:48:23,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142591790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:23,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214878053] [2023-11-19 04:48:23,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:48:23,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:23,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:23,411 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:23,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:48:23,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 04:48:23,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:48:23,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 04:48:23,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-11-19 04:48:23,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2023-11-19 04:48:23,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214878053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:23,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1137379811] [2023-11-19 04:48:23,744 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 04:48:23,744 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:23,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:23,744 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:23,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:24,694 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:25,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1784#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-19 04:48:25,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:25,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:48:25,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 21 [2023-11-19 04:48:25,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079390576] [2023-11-19 04:48:25,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:25,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-19 04:48:25,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:25,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-19 04:48:25,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2023-11-19 04:48:25,570 INFO L87 Difference]: Start difference. First operand 157 states and 219 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2023-11-19 04:48:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:28,049 INFO L93 Difference]: Finished difference Result 850 states and 1220 transitions. [2023-11-19 04:48:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-11-19 04:48:28,050 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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 59 [2023-11-19 04:48:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:28,053 INFO L225 Difference]: With dead ends: 850 [2023-11-19 04:48:28,054 INFO L226 Difference]: Without dead ends: 702 [2023-11-19 04:48:28,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 182 SyntacticMatches, 11 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2169, Invalid=7731, Unknown=0, NotChecked=0, Total=9900 [2023-11-19 04:48:28,060 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3139 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3139 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:28,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3139 Valid, 229 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:48:28,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-11-19 04:48:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 205. [2023-11-19 04:48:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.4264705882352942) internal successors, (291), 204 states have internal predecessors, (291), 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) [2023-11-19 04:48:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 291 transitions. [2023-11-19 04:48:28,091 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 291 transitions. Word has length 59 [2023-11-19 04:48:28,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:28,092 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 291 transitions. [2023-11-19 04:48:28,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 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) [2023-11-19 04:48:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 291 transitions. [2023-11-19 04:48:28,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-11-19 04:48:28,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:28,095 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-19 04:48:28,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:28,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:28,313 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:28,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:28,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1950682712, now seen corresponding path program 3 times [2023-11-19 04:48:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:28,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896321868] [2023-11-19 04:48:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:28,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2023-11-19 04:48:28,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:28,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896321868] [2023-11-19 04:48:28,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896321868] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:28,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241400551] [2023-11-19 04:48:28,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 04:48:28,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:28,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:28,729 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:28,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:48:28,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 04:48:28,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:48:28,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 04:48:28,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-19 04:48:28,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-19 04:48:29,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241400551] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:29,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838311310] [2023-11-19 04:48:29,295 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 04:48:29,295 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:29,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:29,295 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:29,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:30,256 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:30,957 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3904#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-19 04:48:30,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:30,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:48:30,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 27 [2023-11-19 04:48:30,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110356507] [2023-11-19 04:48:30,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:30,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-19 04:48:30,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-19 04:48:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=869, Unknown=0, NotChecked=0, Total=1260 [2023-11-19 04:48:30,961 INFO L87 Difference]: Start difference. First operand 205 states and 291 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 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) [2023-11-19 04:48:31,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:31,478 INFO L93 Difference]: Finished difference Result 1048 states and 1570 transitions. [2023-11-19 04:48:31,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 04:48:31,478 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 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 76 [2023-11-19 04:48:31,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:31,484 INFO L225 Difference]: With dead ends: 1048 [2023-11-19 04:48:31,484 INFO L226 Difference]: Without dead ends: 856 [2023-11-19 04:48:31,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 193 SyntacticMatches, 12 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=391, Invalid=869, Unknown=0, NotChecked=0, Total=1260 [2023-11-19 04:48:31,487 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1013 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1013 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:31,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1013 Valid, 333 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:48:31,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2023-11-19 04:48:31,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 400. [2023-11-19 04:48:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.413533834586466) internal successors, (564), 399 states have internal predecessors, (564), 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) [2023-11-19 04:48:31,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 564 transitions. [2023-11-19 04:48:31,534 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 564 transitions. Word has length 76 [2023-11-19 04:48:31,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:31,535 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 564 transitions. [2023-11-19 04:48:31,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 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) [2023-11-19 04:48:31,535 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 564 transitions. [2023-11-19 04:48:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-19 04:48:31,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:31,538 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-19 04:48:31,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:31,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:31,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:31,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:31,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1087608584, now seen corresponding path program 4 times [2023-11-19 04:48:31,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:31,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894968713] [2023-11-19 04:48:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:31,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:31,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2023-11-19 04:48:33,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:33,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894968713] [2023-11-19 04:48:33,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894968713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:33,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756747040] [2023-11-19 04:48:33,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 04:48:33,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:33,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:33,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:33,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:48:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:33,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 04:48:33,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2023-11-19 04:48:33,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1248 trivial. 0 not checked. [2023-11-19 04:48:34,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756747040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:34,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [707622197] [2023-11-19 04:48:34,383 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 04:48:34,383 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:34,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:34,384 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:34,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:35,108 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:36,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6824#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-19 04:48:36,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:36,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:48:36,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2023-11-19 04:48:36,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265694802] [2023-11-19 04:48:36,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:36,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-19 04:48:36,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:36,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-19 04:48:36,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1418, Invalid=2364, Unknown=0, NotChecked=0, Total=3782 [2023-11-19 04:48:36,393 INFO L87 Difference]: Start difference. First operand 400 states and 564 transitions. Second operand has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 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) [2023-11-19 04:48:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:38,231 INFO L93 Difference]: Finished difference Result 2075 states and 3104 transitions. [2023-11-19 04:48:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-19 04:48:38,232 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 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 141 [2023-11-19 04:48:38,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:38,243 INFO L225 Difference]: With dead ends: 2075 [2023-11-19 04:48:38,243 INFO L226 Difference]: Without dead ends: 1701 [2023-11-19 04:48:38,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 362 SyntacticMatches, 25 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2804 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1418, Invalid=2364, Unknown=0, NotChecked=0, Total=3782 [2023-11-19 04:48:38,248 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3097 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3097 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:38,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3097 Valid, 660 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 04:48:38,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2023-11-19 04:48:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 790. [2023-11-19 04:48:38,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 1.4068441064638784) internal successors, (1110), 789 states have internal predecessors, (1110), 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) [2023-11-19 04:48:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1110 transitions. [2023-11-19 04:48:38,357 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1110 transitions. Word has length 141 [2023-11-19 04:48:38,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:38,357 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 1110 transitions. [2023-11-19 04:48:38,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 52 states have internal predecessors, (65), 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) [2023-11-19 04:48:38,358 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1110 transitions. [2023-11-19 04:48:38,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-19 04:48:38,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:38,363 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 50, 50, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-11-19 04:48:38,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:48:38,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:38,577 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:38,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:38,577 INFO L85 PathProgramCache]: Analyzing trace with hash 389174428, now seen corresponding path program 5 times [2023-11-19 04:48:38,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:38,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281322044] [2023-11-19 04:48:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:38,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 5174 trivial. 0 not checked. [2023-11-19 04:48:42,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:42,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281322044] [2023-11-19 04:48:42,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281322044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:48:42,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340242898] [2023-11-19 04:48:42,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:48:42,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:48:42,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:42,904 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:48:42,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd428feb-0d9d-42a9-8915-4c14361cbf82/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:48:43,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-19 04:48:43,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:48:43,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 04:48:43,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:48:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 295 proven. 28 refuted. 0 times theorem prover too weak. 6126 trivial. 0 not checked. [2023-11-19 04:48:43,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:48:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6449 backedges. 295 proven. 28 refuted. 0 times theorem prover too weak. 6126 trivial. 0 not checked. [2023-11-19 04:48:44,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340242898] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:48:44,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1284874185] [2023-11-19 04:48:44,007 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-11-19 04:48:44,008 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:48:44,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:48:44,008 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:48:44,008 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:48:44,849 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:48:48,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12514#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~#tel_data~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 1000 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~#x~0#1.base|) (= |ULTIMATE.start_main_~#x~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~#tel_data~0#1.offset| 0) (or (< 1000 |ULTIMATE.start_main_~offset~0#1|) (< |ULTIMATE.start_main_~offset~0#1| 0)))' at error location [2023-11-19 04:48:48,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 04:48:48,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:48:48,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 9, 9] total 67 [2023-11-19 04:48:48,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37644224] [2023-11-19 04:48:48,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 04:48:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-19 04:48:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-19 04:48:48,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1490, Invalid=4210, Unknown=0, NotChecked=0, Total=5700 [2023-11-19 04:48:48,716 INFO L87 Difference]: Start difference. First operand 790 states and 1110 transitions. Second operand has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 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)