./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --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 64bit --witnessprinter.graph.data.programhash eca061443980e8d0803d9e641f2f399e16662610ff9edce1dac481c57666d01d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:15:10,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:15:10,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:15:10,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:15:10,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:15:10,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:15:10,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:15:10,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:15:10,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:15:10,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:15:10,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:15:10,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:15:10,228 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:15:10,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:15:10,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:15:10,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:15:10,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:15:10,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:15:10,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:15:10,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:15:10,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:15:10,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:15:10,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:15:10,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:15:10,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:15:10,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:15:10,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:15:10,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:15:10,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:15:10,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:15:10,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:15:10,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:15:10,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:15:10,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:15:10,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:15:10,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:15:10,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:15:10,279 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:15:10,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:15:10,280 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:15:10,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:15:10,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 07:15:10,314 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:15:10,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:15:10,314 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:15:10,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:15:10,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:15:10,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:15:10,316 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:15:10,316 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:15:10,316 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:15:10,317 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:15:10,317 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:15:10,317 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:15:10,317 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:15:10,317 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:15:10,318 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:15:10,318 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:15:10,318 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:15:10,318 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:15:10,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:15:10,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:15:10,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:15:10,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:15:10,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:15:10,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:15:10,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:15:10,320 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:15:10,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:15:10,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:15:10,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:15:10,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:15:10,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:15:10,322 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:15:10,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:15:10,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:15:10,322 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:15:10,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:15:10,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:15:10,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:15:10,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eca061443980e8d0803d9e641f2f399e16662610ff9edce1dac481c57666d01d [2022-11-19 07:15:10,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:15:10,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:15:10,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:15:10,596 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:15:10,597 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:15:10,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i [2022-11-19 07:15:10,662 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/data/201645fe4/363b29050f1a42acafa90a0e1cdfc7ab/FLAG73db88892 [2022-11-19 07:15:11,598 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:15:11,599 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i [2022-11-19 07:15:11,664 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/data/201645fe4/363b29050f1a42acafa90a0e1cdfc7ab/FLAG73db88892 [2022-11-19 07:15:11,997 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/data/201645fe4/363b29050f1a42acafa90a0e1cdfc7ab [2022-11-19 07:15:12,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:15:12,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:15:12,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:15:12,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:15:12,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:15:12,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:15:12" (1/1) ... [2022-11-19 07:15:12,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489cde38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:12, skipping insertion in model container [2022-11-19 07:15:12,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:15:12" (1/1) ... [2022-11-19 07:15:12,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:15:12,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:15:14,652 WARN L234 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_0aecff80-57b2-48f8-99c2-b4699a830487/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i[342799,342812] [2022-11-19 07:15:14,708 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-19 07:15:14,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:15:14,771 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:15:15,345 WARN L234 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_0aecff80-57b2-48f8-99c2-b4699a830487/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i[342799,342812] [2022-11-19 07:15:15,356 WARN L611 FunctionHandler]: implicit declaration of function ldv_xmalloc [2022-11-19 07:15:15,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:15:15,498 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:15:15,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15 WrapperNode [2022-11-19 07:15:15,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:15:15,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:15:15,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:15:15,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:15:15,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (1/1) ... [2022-11-19 07:15:15,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (1/1) ... [2022-11-19 07:15:15,947 INFO L138 Inliner]: procedures = 266, calls = 4465, calls flagged for inlining = 129, calls inlined = 122, statements flattened = 9570 [2022-11-19 07:15:15,948 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:15:15,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:15:15,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:15:15,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:15:15,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (1/1) ... [2022-11-19 07:15:15,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (1/1) ... [2022-11-19 07:15:16,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (1/1) ... [2022-11-19 07:15:16,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (1/1) ... [2022-11-19 07:15:16,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (1/1) ... [2022-11-19 07:15:16,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (1/1) ... [2022-11-19 07:15:16,414 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (1/1) ... [2022-11-19 07:15:16,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (1/1) ... [2022-11-19 07:15:16,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:15:16,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:15:16,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:15:16,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:15:16,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (1/1) ... [2022-11-19 07:15:16,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:15:16,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:15:16,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:15:16,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:15:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure __scsi_print_sense [2022-11-19 07:15:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __scsi_print_sense [2022-11-19 07:15:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-19 07:15:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-19 07:15:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2022-11-19 07:15:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_del [2022-11-19 07:15:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_del [2022-11-19 07:15:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-19 07:15:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 07:15:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure driver_remove_file [2022-11-19 07:15:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_remove_file [2022-11-19 07:15:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 07:15:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 07:15:16,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 07:15:16,589 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 07:15:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure find_partition [2022-11-19 07:15:16,590 INFO L138 BoogieDeclarations]: Found implementation of procedure find_partition [2022-11-19 07:15:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2022-11-19 07:15:16,590 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2022-11-19 07:15:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2022-11-19 07:15:16,590 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2022-11-19 07:15:16,590 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2022-11-19 07:15:16,591 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2022-11-19 07:15:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-11-19 07:15:16,591 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-11-19 07:15:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 07:15:16,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 07:15:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure class_unregister [2022-11-19 07:15:16,591 INFO L138 BoogieDeclarations]: Found implementation of procedure class_unregister [2022-11-19 07:15:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2022-11-19 07:15:16,592 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2022-11-19 07:15:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-19 07:15:16,592 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-19 07:15:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 07:15:16,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 07:15:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2022-11-19 07:15:16,592 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2022-11-19 07:15:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-19 07:15:16,593 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-19 07:15:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 07:15:16,593 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 07:15:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure st_int_ioctl [2022-11-19 07:15:16,593 INFO L138 BoogieDeclarations]: Found implementation of procedure st_int_ioctl [2022-11-19 07:15:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_rq_timeout [2022-11-19 07:15:16,593 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_rq_timeout [2022-11-19 07:15:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure set_mode_densblk [2022-11-19 07:15:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure set_mode_densblk [2022-11-19 07:15:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure ktime_get [2022-11-19 07:15:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ktime_get [2022-11-19 07:15:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:15:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure atomic64_read [2022-11-19 07:15:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic64_read [2022-11-19 07:15:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure read_mode_page [2022-11-19 07:15:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure read_mode_page [2022-11-19 07:15:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2022-11-19 07:15:16,595 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2022-11-19 07:15:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:15:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure put_page [2022-11-19 07:15:16,595 INFO L138 BoogieDeclarations]: Found implementation of procedure put_page [2022-11-19 07:15:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2022-11-19 07:15:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure st_do_scsi [2022-11-19 07:15:16,595 INFO L138 BoogieDeclarations]: Found implementation of procedure st_do_scsi [2022-11-19 07:15:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2022-11-19 07:15:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-19 07:15:16,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-19 07:15:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-11-19 07:15:16,596 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-11-19 07:15:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure atomic64_inc [2022-11-19 07:15:16,596 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic64_inc [2022-11-19 07:15:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2022-11-19 07:15:16,597 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2022-11-19 07:15:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:15:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure st_release_request [2022-11-19 07:15:16,597 INFO L138 BoogieDeclarations]: Found implementation of procedure st_release_request [2022-11-19 07:15:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:15:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure remove_cdevs [2022-11-19 07:15:16,597 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_cdevs [2022-11-19 07:15:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2022-11-19 07:15:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2022-11-19 07:15:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure get_location [2022-11-19 07:15:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure get_location [2022-11-19 07:15:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure st_compression [2022-11-19 07:15:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure st_compression [2022-11-19 07:15:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_put_device [2022-11-19 07:15:16,598 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_put_device [2022-11-19 07:15:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-19 07:15:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-19 07:15:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-11-19 07:15:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-11-19 07:15:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-19 07:15:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-19 07:15:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-19 07:15:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-19 07:15:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-11-19 07:15:16,599 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-11-19 07:15:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure check_tape [2022-11-19 07:15:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure check_tape [2022-11-19 07:15:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-19 07:15:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-19 07:15:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure switch_partition [2022-11-19 07:15:16,600 INFO L138 BoogieDeclarations]: Found implementation of procedure switch_partition [2022-11-19 07:15:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-19 07:15:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure setup_buffering [2022-11-19 07:15:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_buffering [2022-11-19 07:15:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-19 07:15:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-19 07:15:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_tape_put [2022-11-19 07:15:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_tape_put [2022-11-19 07:15:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-19 07:15:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_cmd_ioctl [2022-11-19 07:15:16,601 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_cmd_ioctl [2022-11-19 07:15:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure st_log_options [2022-11-19 07:15:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure st_log_options [2022-11-19 07:15:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:15:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure create_one_cdev [2022-11-19 07:15:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure create_one_cdev [2022-11-19 07:15:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure queue_dma_alignment [2022-11-19 07:15:16,602 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_dma_alignment [2022-11-19 07:15:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure do_load_unload [2022-11-19 07:15:16,603 INFO L138 BoogieDeclarations]: Found implementation of procedure do_load_unload [2022-11-19 07:15:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush_write_buffer [2022-11-19 07:15:16,603 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush_write_buffer [2022-11-19 07:15:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-19 07:15:16,603 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-19 07:15:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure enlarge_buffer [2022-11-19 07:15:16,603 INFO L138 BoogieDeclarations]: Found implementation of procedure enlarge_buffer [2022-11-19 07:15:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2022-11-19 07:15:16,603 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2022-11-19 07:15:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure st_chk_result [2022-11-19 07:15:16,604 INFO L138 BoogieDeclarations]: Found implementation of procedure st_chk_result [2022-11-19 07:15:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 07:15:16,604 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 07:15:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure write_behind_check [2022-11-19 07:15:16,604 INFO L138 BoogieDeclarations]: Found implementation of procedure write_behind_check [2022-11-19 07:15:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:15:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-19 07:15:16,660 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-19 07:15:16,660 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2022-11-19 07:15:16,660 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2022-11-19 07:15:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 07:15:16,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 07:15:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2022-11-19 07:15:16,661 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2022-11-19 07:15:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-19 07:15:16,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-19 07:15:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:15:16,661 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-19 07:15:16,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-19 07:15:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2022-11-19 07:15:16,662 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2022-11-19 07:15:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:15:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure deb_space_print [2022-11-19 07:15:16,662 INFO L138 BoogieDeclarations]: Found implementation of procedure deb_space_print [2022-11-19 07:15:16,662 INFO L130 BoogieDeclarations]: Found specification of procedure flush_buffer [2022-11-19 07:15:16,662 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_buffer [2022-11-19 07:15:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2022-11-19 07:15:16,663 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2022-11-19 07:15:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:15:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-11-19 07:15:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure driver_create_file [2022-11-19 07:15:16,663 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_create_file [2022-11-19 07:15:16,663 INFO L130 BoogieDeclarations]: Found specification of procedure release_buffering [2022-11-19 07:15:16,663 INFO L138 BoogieDeclarations]: Found implementation of procedure release_buffering [2022-11-19 07:15:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2022-11-19 07:15:16,664 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2022-11-19 07:15:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2022-11-19 07:15:16,664 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2022-11-19 07:15:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure write_mode_page [2022-11-19 07:15:16,664 INFO L138 BoogieDeclarations]: Found implementation of procedure write_mode_page [2022-11-19 07:15:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure st_flush [2022-11-19 07:15:16,664 INFO L138 BoogieDeclarations]: Found implementation of procedure st_flush [2022-11-19 07:15:16,664 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-19 07:15:16,665 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-19 07:15:16,666 INFO L130 BoogieDeclarations]: Found specification of procedure rw_checks [2022-11-19 07:15:16,667 INFO L138 BoogieDeclarations]: Found implementation of procedure rw_checks [2022-11-19 07:15:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2022-11-19 07:15:16,667 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2022-11-19 07:15:16,667 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2022-11-19 07:15:16,667 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2022-11-19 07:15:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure st_write [2022-11-19 07:15:16,668 INFO L138 BoogieDeclarations]: Found implementation of procedure st_write [2022-11-19 07:15:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-19 07:15:16,668 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-19 07:15:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:15:16,668 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_autopm_get_device [2022-11-19 07:15:16,669 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_autopm_get_device [2022-11-19 07:15:16,669 INFO L130 BoogieDeclarations]: Found specification of procedure set_location [2022-11-19 07:15:16,669 INFO L138 BoogieDeclarations]: Found implementation of procedure set_location [2022-11-19 07:15:16,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:15:16,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:15:16,670 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-19 07:15:16,670 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-19 07:15:18,013 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:15:18,019 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:15:18,164 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 07:15:31,463 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:15:36,767 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:15:36,767 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:15:36,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:15:36 BoogieIcfgContainer [2022-11-19 07:15:36,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:15:36,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:15:36,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:15:36,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:15:36,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:15:12" (1/3) ... [2022-11-19 07:15:36,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267e4931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:15:36, skipping insertion in model container [2022-11-19 07:15:36,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:15:15" (2/3) ... [2022-11-19 07:15:36,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267e4931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:15:36, skipping insertion in model container [2022-11-19 07:15:36,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:15:36" (3/3) ... [2022-11-19 07:15:36,788 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--st.ko-entry_point.cil.out.i [2022-11-19 07:15:36,810 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:15:36,811 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:15:36,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:15:36,929 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=LoopsAndPotentialCycles, 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;@30cfa731, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:15:36,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:15:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 1984 states, 1359 states have (on average 1.445916114790287) internal successors, (1965), 1399 states have internal predecessors, (1965), 538 states have call successors, (538), 86 states have call predecessors, (538), 85 states have return successors, (515), 514 states have call predecessors, (515), 515 states have call successors, (515) [2022-11-19 07:15:36,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2022-11-19 07:15:36,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:15:36,986 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:15:36,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:15:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:15:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash -860073791, now seen corresponding path program 1 times [2022-11-19 07:15:37,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:15:37,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140875291] [2022-11-19 07:15:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:15:37,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:15:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:15:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16726 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2022-11-19 07:15:39,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:15:39,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140875291] [2022-11-19 07:15:39,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140875291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:15:39,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:15:39,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:15:39,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338379797] [2022-11-19 07:15:39,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:15:39,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:15:39,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:15:39,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:15:39,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:15:39,776 INFO L87 Difference]: Start difference. First operand has 1984 states, 1359 states have (on average 1.445916114790287) internal successors, (1965), 1399 states have internal predecessors, (1965), 538 states have call successors, (538), 86 states have call predecessors, (538), 85 states have return successors, (515), 514 states have call predecessors, (515), 515 states have call successors, (515) Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 07:15:41,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:15:45,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:15:48,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:15:50,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:15:52,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:15:55,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:15:58,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:16:01,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:16:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:02,653 INFO L93 Difference]: Finished difference Result 3750 states and 5724 transitions. [2022-11-19 07:16:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:02,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) Word has length 790 [2022-11-19 07:16:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:02,710 INFO L225 Difference]: With dead ends: 3750 [2022-11-19 07:16:02,710 INFO L226 Difference]: Without dead ends: 3683 [2022-11-19 07:16:02,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:02,729 INFO L413 NwaCegarLoop]: 3120 mSDtfsCounter, 2734 mSDsluCounter, 2481 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2748 SdHoareTripleChecker+Valid, 5601 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:02,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2748 Valid, 5601 Invalid, 664 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 657 Invalid, 6 Unknown, 0 Unchecked, 22.5s Time] [2022-11-19 07:16:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2022-11-19 07:16:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 3682. [2022-11-19 07:16:03,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 2590 states have (on average 1.4416988416988417) internal successors, (3734), 2618 states have internal predecessors, (3734), 926 states have call successors, (926), 166 states have call predecessors, (926), 165 states have return successors, (939), 923 states have call predecessors, (939), 925 states have call successors, (939) [2022-11-19 07:16:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 5599 transitions. [2022-11-19 07:16:03,087 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 5599 transitions. Word has length 790 [2022-11-19 07:16:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:03,098 INFO L495 AbstractCegarLoop]: Abstraction has 3682 states and 5599 transitions. [2022-11-19 07:16:03,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (70), 2 states have call predecessors, (70), 1 states have return successors, (69), 2 states have call predecessors, (69), 2 states have call successors, (69) [2022-11-19 07:16:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 5599 transitions. [2022-11-19 07:16:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2022-11-19 07:16:03,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:03,147 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:03,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:16:03,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash 622739451, now seen corresponding path program 1 times [2022-11-19 07:16:03,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:03,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215134736] [2022-11-19 07:16:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:03,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:03,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:16:03,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445003853] [2022-11-19 07:16:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:03,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:03,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:16:03,676 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:16:03,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:16:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 9849 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:16:07,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:16:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16735 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16726 trivial. 0 not checked. [2022-11-19 07:16:07,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:16:07,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:07,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215134736] [2022-11-19 07:16:07,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:16:07,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445003853] [2022-11-19 07:16:07,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445003853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:07,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:07,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:07,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182305407] [2022-11-19 07:16:07,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:07,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:07,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:07,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:07,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:07,489 INFO L87 Difference]: Start difference. First operand 3682 states and 5599 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) [2022-11-19 07:16:09,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:11,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:15,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:19,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:16:21,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:23,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:25,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:27,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:30,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:16:31,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:16:31,527 INFO L93 Difference]: Finished difference Result 7993 states and 12113 transitions. [2022-11-19 07:16:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:16:31,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) Word has length 851 [2022-11-19 07:16:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:16:31,566 INFO L225 Difference]: With dead ends: 7993 [2022-11-19 07:16:31,566 INFO L226 Difference]: Without dead ends: 4448 [2022-11-19 07:16:31,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 850 GetRequests, 849 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:31,587 INFO L413 NwaCegarLoop]: 2718 mSDtfsCounter, 533 mSDsluCounter, 2609 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 10 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 5327 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:16:31,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 5327 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 686 Invalid, 7 Unknown, 0 Unchecked, 23.8s Time] [2022-11-19 07:16:31,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2022-11-19 07:16:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 4442. [2022-11-19 07:16:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4442 states, 3143 states have (on average 1.4422526248806873) internal successors, (4533), 3186 states have internal predecessors, (4533), 1075 states have call successors, (1075), 224 states have call predecessors, (1075), 223 states have return successors, (1088), 1071 states have call predecessors, (1088), 1074 states have call successors, (1088) [2022-11-19 07:16:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4442 states to 4442 states and 6696 transitions. [2022-11-19 07:16:31,809 INFO L78 Accepts]: Start accepts. Automaton has 4442 states and 6696 transitions. Word has length 851 [2022-11-19 07:16:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:16:31,813 INFO L495 AbstractCegarLoop]: Abstraction has 4442 states and 6696 transitions. [2022-11-19 07:16:31,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 2 states have call successors, (76), 2 states have call predecessors, (76), 2 states have return successors, (75), 2 states have call predecessors, (75), 2 states have call successors, (75) [2022-11-19 07:16:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4442 states and 6696 transitions. [2022-11-19 07:16:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2022-11-19 07:16:31,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:16:31,849 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 58, 8, 8, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:16:31,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 07:16:32,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:16:32,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:16:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:16:32,067 INFO L85 PathProgramCache]: Analyzing trace with hash -572136350, now seen corresponding path program 1 times [2022-11-19 07:16:32,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:16:32,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006511392] [2022-11-19 07:16:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:16:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:16:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:16:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16751 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 16748 trivial. 0 not checked. [2022-11-19 07:16:33,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:16:33,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006511392] [2022-11-19 07:16:33,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006511392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:16:33,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:16:33,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:16:33,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082234792] [2022-11-19 07:16:33,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:16:33,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:16:33,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:16:33,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:16:33,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:16:33,598 INFO L87 Difference]: Start difference. First operand 4442 states and 6696 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) [2022-11-19 07:16:35,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:38,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:39,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:43,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:16:45,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:47,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:49,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:51,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:53,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:16:55,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:00,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:17:01,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:17:03,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:17:05,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:05,371 INFO L93 Difference]: Finished difference Result 12552 states and 19015 transitions. [2022-11-19 07:17:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:05,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) Word has length 879 [2022-11-19 07:17:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:05,431 INFO L225 Difference]: With dead ends: 12552 [2022-11-19 07:17:05,431 INFO L226 Difference]: Without dead ends: 8247 [2022-11-19 07:17:05,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:05,457 INFO L413 NwaCegarLoop]: 4505 mSDtfsCounter, 2524 mSDsluCounter, 2628 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 1 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2538 SdHoareTripleChecker+Valid, 7133 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:05,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2538 Valid, 7133 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 909 Invalid, 8 Unknown, 0 Unchecked, 31.5s Time] [2022-11-19 07:17:05,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8247 states. [2022-11-19 07:17:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8247 to 8232. [2022-11-19 07:17:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8232 states, 5901 states have (on average 1.453143534994069) internal successors, (8575), 5982 states have internal predecessors, (8575), 1937 states have call successors, (1937), 394 states have call predecessors, (1937), 393 states have return successors, (1992), 1923 states have call predecessors, (1992), 1936 states have call successors, (1992) [2022-11-19 07:17:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8232 states to 8232 states and 12504 transitions. [2022-11-19 07:17:05,954 INFO L78 Accepts]: Start accepts. Automaton has 8232 states and 12504 transitions. Word has length 879 [2022-11-19 07:17:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:05,955 INFO L495 AbstractCegarLoop]: Abstraction has 8232 states and 12504 transitions. [2022-11-19 07:17:05,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 2 states have call successors, (84), 2 states have call predecessors, (84), 1 states have return successors, (83), 2 states have call predecessors, (83), 2 states have call successors, (83) [2022-11-19 07:17:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 8232 states and 12504 transitions. [2022-11-19 07:17:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 905 [2022-11-19 07:17:06,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:06,007 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:06,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:17:06,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:06,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:06,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1311996320, now seen corresponding path program 1 times [2022-11-19 07:17:06,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:06,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777893518] [2022-11-19 07:17:06,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:06,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:06,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:17:06,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522235684] [2022-11-19 07:17:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:06,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:06,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:06,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:06,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:17:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:09,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 10184 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18531 backedges. 1775 proven. 0 refuted. 0 times theorem prover too weak. 16756 trivial. 0 not checked. [2022-11-19 07:17:09,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:09,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777893518] [2022-11-19 07:17:09,997 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:17:09,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522235684] [2022-11-19 07:17:09,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522235684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:09,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:09,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:17:09,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828550984] [2022-11-19 07:17:09,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:10,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:10,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:10,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:10,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:10,001 INFO L87 Difference]: Start difference. First operand 8232 states and 12504 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (81), 3 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) [2022-11-19 07:17:12,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:16,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:18,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:20,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:17:22,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:17:24,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:28,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:17:30,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:32,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:35,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:17:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:37,530 INFO L93 Difference]: Finished difference Result 21018 states and 31827 transitions. [2022-11-19 07:17:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:37,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (81), 3 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) Word has length 904 [2022-11-19 07:17:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:37,619 INFO L225 Difference]: With dead ends: 21018 [2022-11-19 07:17:37,619 INFO L226 Difference]: Without dead ends: 12923 [2022-11-19 07:17:37,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 902 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:37,659 INFO L413 NwaCegarLoop]: 2953 mSDtfsCounter, 1919 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 14 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1927 SdHoareTripleChecker+Valid, 5417 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:37,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1927 Valid, 5417 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 683 Invalid, 9 Unknown, 0 Unchecked, 27.1s Time] [2022-11-19 07:17:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12923 states. [2022-11-19 07:17:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12923 to 12910. [2022-11-19 07:17:38,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12910 states, 9255 states have (on average 1.451431658562939) internal successors, (13433), 9390 states have internal predecessors, (13433), 2979 states have call successors, (2979), 676 states have call predecessors, (2979), 675 states have return successors, (3082), 2951 states have call predecessors, (3082), 2978 states have call successors, (3082) [2022-11-19 07:17:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12910 states to 12910 states and 19494 transitions. [2022-11-19 07:17:38,311 INFO L78 Accepts]: Start accepts. Automaton has 12910 states and 19494 transitions. Word has length 904 [2022-11-19 07:17:38,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:38,313 INFO L495 AbstractCegarLoop]: Abstraction has 12910 states and 19494 transitions. [2022-11-19 07:17:38,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (81), 3 states have call predecessors, (81), 3 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) [2022-11-19 07:17:38,314 INFO L276 IsEmpty]: Start isEmpty. Operand 12910 states and 19494 transitions. [2022-11-19 07:17:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 933 [2022-11-19 07:17:38,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:38,343 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:38,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:38,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:38,568 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash -560705209, now seen corresponding path program 1 times [2022-11-19 07:17:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:38,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169773761] [2022-11-19 07:17:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18541 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 18522 trivial. 0 not checked. [2022-11-19 07:17:40,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:40,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169773761] [2022-11-19 07:17:40,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169773761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:40,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:40,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:17:40,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014520940] [2022-11-19 07:17:40,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:40,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:17:40,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:17:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:17:40,453 INFO L87 Difference]: Start difference. First operand 12910 states and 19494 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2022-11-19 07:17:42,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:49,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:50,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:51,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:17:52,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:17:56,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:01,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:18:02,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:04,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:06,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:09,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:13,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:13,288 INFO L93 Difference]: Finished difference Result 25721 states and 38841 transitions. [2022-11-19 07:18:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:18:13,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) Word has length 932 [2022-11-19 07:18:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:13,354 INFO L225 Difference]: With dead ends: 25721 [2022-11-19 07:18:13,355 INFO L226 Difference]: Without dead ends: 12932 [2022-11-19 07:18:13,406 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 [2022-11-19 07:18:13,407 INFO L413 NwaCegarLoop]: 2632 mSDtfsCounter, 14 mSDsluCounter, 5260 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 5 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7892 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:13,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 7892 Invalid, 1005 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 995 Invalid, 5 Unknown, 0 Unchecked, 32.4s Time] [2022-11-19 07:18:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12932 states. [2022-11-19 07:18:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12932 to 12575. [2022-11-19 07:18:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12575 states, 9068 states have (on average 1.4518085575650639) internal successors, (13165), 9167 states have internal predecessors, (13165), 2871 states have call successors, (2871), 636 states have call predecessors, (2871), 635 states have return successors, (2974), 2847 states have call predecessors, (2974), 2870 states have call successors, (2974) [2022-11-19 07:18:13,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12575 states to 12575 states and 19010 transitions. [2022-11-19 07:18:13,968 INFO L78 Accepts]: Start accepts. Automaton has 12575 states and 19010 transitions. Word has length 932 [2022-11-19 07:18:13,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:13,969 INFO L495 AbstractCegarLoop]: Abstraction has 12575 states and 19010 transitions. [2022-11-19 07:18:13,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (86), 2 states have call predecessors, (86), 2 states have call successors, (86) [2022-11-19 07:18:13,970 INFO L276 IsEmpty]: Start isEmpty. Operand 12575 states and 19010 transitions. [2022-11-19 07:18:13,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 938 [2022-11-19 07:18:13,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:13,994 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:13,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:18:13,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:13,995 INFO L85 PathProgramCache]: Analyzing trace with hash 269530208, now seen corresponding path program 1 times [2022-11-19 07:18:13,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:13,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925308462] [2022-11-19 07:18:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:13,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18541 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18521 trivial. 0 not checked. [2022-11-19 07:18:15,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:15,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925308462] [2022-11-19 07:18:15,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925308462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:18:15,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:18:15,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:18:15,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388780698] [2022-11-19 07:18:15,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:18:15,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:18:15,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:15,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:18:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:18:15,647 INFO L87 Difference]: Start difference. First operand 12575 states and 19010 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2022-11-19 07:18:17,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:20,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:23,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:24,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:28,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:32,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:18:34,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:36,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:38,096 INFO L93 Difference]: Finished difference Result 18845 states and 28478 transitions. [2022-11-19 07:18:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:18:38,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) Word has length 937 [2022-11-19 07:18:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:38,174 INFO L225 Difference]: With dead ends: 18845 [2022-11-19 07:18:38,174 INFO L226 Difference]: Without dead ends: 12577 [2022-11-19 07:18:38,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:18:38,202 INFO L413 NwaCegarLoop]: 2635 mSDtfsCounter, 0 mSDsluCounter, 2633 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5268 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:38,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5268 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 654 Invalid, 5 Unknown, 0 Unchecked, 22.2s Time] [2022-11-19 07:18:38,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12577 states. [2022-11-19 07:18:38,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12577 to 12577. [2022-11-19 07:18:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 9070 states have (on average 1.4517089305402426) internal successors, (13167), 9169 states have internal predecessors, (13167), 2871 states have call successors, (2871), 636 states have call predecessors, (2871), 635 states have return successors, (2974), 2847 states have call predecessors, (2974), 2870 states have call successors, (2974) [2022-11-19 07:18:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 19012 transitions. [2022-11-19 07:18:38,830 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 19012 transitions. Word has length 937 [2022-11-19 07:18:38,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:38,832 INFO L495 AbstractCegarLoop]: Abstraction has 12577 states and 19012 transitions. [2022-11-19 07:18:38,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 2 states have call successors, (88), 2 states have call predecessors, (88), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2022-11-19 07:18:38,832 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 19012 transitions. [2022-11-19 07:18:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2022-11-19 07:18:38,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:38,855 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:38,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:18:38,856 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1254633311, now seen corresponding path program 1 times [2022-11-19 07:18:38,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:38,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247276153] [2022-11-19 07:18:38,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:38,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:40,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18543 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 18522 trivial. 0 not checked. [2022-11-19 07:18:40,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:40,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247276153] [2022-11-19 07:18:40,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247276153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:18:40,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075324821] [2022-11-19 07:18:40,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:40,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:40,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:40,576 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:18:40,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:18:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:43,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 10714 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:18:43,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18543 backedges. 1760 proven. 0 refuted. 0 times theorem prover too weak. 16783 trivial. 0 not checked. [2022-11-19 07:18:44,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:18:44,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075324821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:18:44,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:18:44,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-19 07:18:44,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030697151] [2022-11-19 07:18:44,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:18:44,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:18:44,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:44,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:18:44,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:18:44,204 INFO L87 Difference]: Start difference. First operand 12577 states and 19012 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2022-11-19 07:18:46,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:48,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:50,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:18:52,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:18:55,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:18:57,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:00,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:02,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:06,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:08,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:09,965 INFO L93 Difference]: Finished difference Result 31317 states and 47451 transitions. [2022-11-19 07:19:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:09,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 939 [2022-11-19 07:19:09,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:10,180 INFO L225 Difference]: With dead ends: 31317 [2022-11-19 07:19:10,180 INFO L226 Difference]: Without dead ends: 18688 [2022-11-19 07:19:10,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 939 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:19:10,217 INFO L413 NwaCegarLoop]: 3317 mSDtfsCounter, 2573 mSDsluCounter, 2604 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 2 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2587 SdHoareTripleChecker+Valid, 5921 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:10,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2587 Valid, 5921 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 691 Invalid, 8 Unknown, 0 Unchecked, 25.3s Time] [2022-11-19 07:19:10,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18688 states. [2022-11-19 07:19:10,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18688 to 18669. [2022-11-19 07:19:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18669 states, 13506 states have (on average 1.4522434473567303) internal successors, (19614), 13641 states have internal predecessors, (19614), 4223 states have call successors, (4223), 939 states have call predecessors, (4223), 939 states have return successors, (4458), 4190 states have call predecessors, (4458), 4222 states have call successors, (4458) [2022-11-19 07:19:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18669 states to 18669 states and 28295 transitions. [2022-11-19 07:19:10,993 INFO L78 Accepts]: Start accepts. Automaton has 18669 states and 28295 transitions. Word has length 939 [2022-11-19 07:19:10,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:10,994 INFO L495 AbstractCegarLoop]: Abstraction has 18669 states and 28295 transitions. [2022-11-19 07:19:10,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 3 states have call successors, (90), 3 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2022-11-19 07:19:10,994 INFO L276 IsEmpty]: Start isEmpty. Operand 18669 states and 28295 transitions. [2022-11-19 07:19:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2022-11-19 07:19:11,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:11,023 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:11,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:11,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 07:19:11,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:11,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:11,249 INFO L85 PathProgramCache]: Analyzing trace with hash 996870494, now seen corresponding path program 1 times [2022-11-19 07:19:11,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:19:11,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067249875] [2022-11-19 07:19:11,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:11,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:19:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18551 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 18536 trivial. 0 not checked. [2022-11-19 07:19:12,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:19:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067249875] [2022-11-19 07:19:12,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067249875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:19:12,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122137719] [2022-11-19 07:19:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:12,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:12,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:12,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:12,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:19:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:16,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 10777 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:19:16,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18551 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18551 trivial. 0 not checked. [2022-11-19 07:19:18,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:18,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122137719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:18,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:19:18,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-19 07:19:18,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129503351] [2022-11-19 07:19:18,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:18,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:18,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:19:18,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:18,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:19:18,395 INFO L87 Difference]: Start difference. First operand 18669 states and 28295 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) [2022-11-19 07:19:20,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:23,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:26,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:28,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:19:31,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:33,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:36,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:37,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:41,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:19:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:41,816 INFO L93 Difference]: Finished difference Result 31060 states and 47042 transitions. [2022-11-19 07:19:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) Word has length 957 [2022-11-19 07:19:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:41,993 INFO L225 Difference]: With dead ends: 31060 [2022-11-19 07:19:41,993 INFO L226 Difference]: Without dead ends: 30838 [2022-11-19 07:19:42,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 957 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:19:42,018 INFO L413 NwaCegarLoop]: 3093 mSDtfsCounter, 2616 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2616 SdHoareTripleChecker+Valid, 5527 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:42,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2616 Valid, 5527 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 658 Invalid, 3 Unknown, 0 Unchecked, 22.9s Time] [2022-11-19 07:19:42,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30838 states. [2022-11-19 07:19:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30838 to 30500. [2022-11-19 07:19:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30500 states, 22053 states have (on average 1.4527275200652972) internal successors, (32037), 22275 states have internal predecessors, (32037), 6914 states have call successors, (6914), 1532 states have call predecessors, (6914), 1532 states have return successors, (7253), 6860 states have call predecessors, (7253), 6913 states have call successors, (7253) [2022-11-19 07:19:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30500 states to 30500 states and 46204 transitions. [2022-11-19 07:19:43,393 INFO L78 Accepts]: Start accepts. Automaton has 30500 states and 46204 transitions. Word has length 957 [2022-11-19 07:19:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:43,394 INFO L495 AbstractCegarLoop]: Abstraction has 30500 states and 46204 transitions. [2022-11-19 07:19:43,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 2 states have call successors, (95), 2 states have call predecessors, (95), 1 states have return successors, (94), 1 states have call predecessors, (94), 1 states have call successors, (94) [2022-11-19 07:19:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 30500 states and 46204 transitions. [2022-11-19 07:19:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 976 [2022-11-19 07:19:43,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:43,451 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:19:43,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:43,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:43,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash -910593213, now seen corresponding path program 1 times [2022-11-19 07:19:43,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:19:43,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845573310] [2022-11-19 07:19:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:43,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:19:44,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:19:44,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418096993] [2022-11-19 07:19:44,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:44,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:44,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:44,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:44,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:19:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:47,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 10592 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:19:47,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18575 backedges. 1775 proven. 0 refuted. 0 times theorem prover too weak. 16800 trivial. 0 not checked. [2022-11-19 07:19:48,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:48,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:19:48,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845573310] [2022-11-19 07:19:48,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:19:48,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418096993] [2022-11-19 07:19:48,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418096993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:48,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:48,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:19:48,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057723981] [2022-11-19 07:19:48,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:48,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:48,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:19:48,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:48,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:48,400 INFO L87 Difference]: Start difference. First operand 30500 states and 46204 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2022-11-19 07:19:50,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:54,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:19:57,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:19:59,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:02,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:20:04,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:08,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:10,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:13,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:13,948 INFO L93 Difference]: Finished difference Result 79145 states and 119866 transitions. [2022-11-19 07:20:13,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:20:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) Word has length 975 [2022-11-19 07:20:13,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:14,216 INFO L225 Difference]: With dead ends: 79145 [2022-11-19 07:20:14,216 INFO L226 Difference]: Without dead ends: 54385 [2022-11-19 07:20:14,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 974 GetRequests, 973 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:14,311 INFO L413 NwaCegarLoop]: 3332 mSDtfsCounter, 2482 mSDsluCounter, 2604 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2496 SdHoareTripleChecker+Valid, 5936 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:14,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2496 Valid, 5936 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 703 Invalid, 6 Unknown, 0 Unchecked, 24.3s Time] [2022-11-19 07:20:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54385 states. [2022-11-19 07:20:16,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54385 to 53305. [2022-11-19 07:20:16,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53305 states, 38516 states have (on average 1.4533181015681795) internal successors, (55976), 38899 states have internal predecessors, (55976), 12106 states have call successors, (12106), 2682 states have call predecessors, (12106), 2682 states have return successors, (12709), 12003 states have call predecessors, (12709), 12105 states have call successors, (12709) [2022-11-19 07:20:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53305 states to 53305 states and 80791 transitions. [2022-11-19 07:20:16,916 INFO L78 Accepts]: Start accepts. Automaton has 53305 states and 80791 transitions. Word has length 975 [2022-11-19 07:20:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:16,918 INFO L495 AbstractCegarLoop]: Abstraction has 53305 states and 80791 transitions. [2022-11-19 07:20:16,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 3 states have call successors, (91), 3 states have call predecessors, (91), 2 states have return successors, (90), 2 states have call predecessors, (90), 2 states have call successors, (90) [2022-11-19 07:20:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 53305 states and 80791 transitions. [2022-11-19 07:20:17,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 994 [2022-11-19 07:20:17,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:17,224 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:17,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:17,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:17,452 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:17,453 INFO L85 PathProgramCache]: Analyzing trace with hash 57711682, now seen corresponding path program 1 times [2022-11-19 07:20:17,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:17,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967203302] [2022-11-19 07:20:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:17,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:18,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:20:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535820338] [2022-11-19 07:20:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:18,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:18,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:18,065 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:18,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:20:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:21,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 10655 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:20:21,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18583 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18583 trivial. 0 not checked. [2022-11-19 07:20:23,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:20:23,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:23,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967203302] [2022-11-19 07:20:23,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:20:23,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535820338] [2022-11-19 07:20:23,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535820338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:23,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:23,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:20:23,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428565925] [2022-11-19 07:20:23,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:23,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:20:23,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:23,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:20:23,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:23,512 INFO L87 Difference]: Start difference. First operand 53305 states and 80791 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2022-11-19 07:20:25,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:29,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:32,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:20:34,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:37,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:20:39,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:41,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:44,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:48,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:48,102 INFO L93 Difference]: Finished difference Result 65627 states and 99373 transitions. [2022-11-19 07:20:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:20:48,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 993 [2022-11-19 07:20:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:48,375 INFO L225 Difference]: With dead ends: 65627 [2022-11-19 07:20:48,375 INFO L226 Difference]: Without dead ends: 65408 [2022-11-19 07:20:48,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 991 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:48,405 INFO L413 NwaCegarLoop]: 3090 mSDtfsCounter, 2495 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2509 SdHoareTripleChecker+Valid, 5524 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:48,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2509 Valid, 5524 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 662 Invalid, 5 Unknown, 0 Unchecked, 23.0s Time] [2022-11-19 07:20:48,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65408 states. [2022-11-19 07:20:50,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65408 to 64723. [2022-11-19 07:20:50,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64723 states, 46756 states have (on average 1.453246642142185) internal successors, (67948), 47220 states have internal predecessors, (67948), 14708 states have call successors, (14708), 3258 states have call predecessors, (14708), 3258 states have return successors, (15399), 14581 states have call predecessors, (15399), 14707 states have call successors, (15399) [2022-11-19 07:20:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64723 states to 64723 states and 98055 transitions. [2022-11-19 07:20:51,616 INFO L78 Accepts]: Start accepts. Automaton has 64723 states and 98055 transitions. Word has length 993 [2022-11-19 07:20:51,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:51,627 INFO L495 AbstractCegarLoop]: Abstraction has 64723 states and 98055 transitions. [2022-11-19 07:20:51,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2022-11-19 07:20:51,628 INFO L276 IsEmpty]: Start isEmpty. Operand 64723 states and 98055 transitions. [2022-11-19 07:20:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2022-11-19 07:20:51,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:51,689 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:51,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:51,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:20:51,904 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:51,905 INFO L85 PathProgramCache]: Analyzing trace with hash -699922915, now seen corresponding path program 1 times [2022-11-19 07:20:51,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:51,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683809441] [2022-11-19 07:20:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:51,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:52,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:20:52,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122781726] [2022-11-19 07:20:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:52,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:52,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:52,385 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:52,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:20:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:56,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 11499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:20:56,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18564 backedges. 1781 proven. 0 refuted. 0 times theorem prover too weak. 16783 trivial. 0 not checked. [2022-11-19 07:20:56,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:20:56,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:56,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683809441] [2022-11-19 07:20:56,822 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:20:56,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122781726] [2022-11-19 07:20:56,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122781726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:56,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:56,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:20:56,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488600282] [2022-11-19 07:20:56,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:56,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:20:56,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:56,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:20:56,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:56,826 INFO L87 Difference]: Start difference. First operand 64723 states and 98055 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 07:21:02,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:04,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:21:06,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:21:08,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:11,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:21:13,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:15,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:17,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:20,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:21:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:23,609 INFO L93 Difference]: Finished difference Result 114666 states and 173777 transitions. [2022-11-19 07:21:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:21:23,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) Word has length 1000 [2022-11-19 07:21:23,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:23,849 INFO L225 Difference]: With dead ends: 114666 [2022-11-19 07:21:23,849 INFO L226 Difference]: Without dead ends: 67298 [2022-11-19 07:21:24,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 998 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:21:24,084 INFO L413 NwaCegarLoop]: 2962 mSDtfsCounter, 2129 mSDsluCounter, 2258 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 15 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2137 SdHoareTripleChecker+Valid, 5220 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:24,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2137 Valid, 5220 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 678 Invalid, 7 Unknown, 0 Unchecked, 25.0s Time] [2022-11-19 07:21:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67298 states. [2022-11-19 07:21:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67298 to 67121. [2022-11-19 07:21:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67121 states, 48615 states have (on average 1.453748842949707) internal successors, (70674), 49092 states have internal predecessors, (70674), 15124 states have call successors, (15124), 3378 states have call predecessors, (15124), 3381 states have return successors, (15975), 15003 states have call predecessors, (15975), 15123 states have call successors, (15975) [2022-11-19 07:21:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67121 states to 67121 states and 101773 transitions. [2022-11-19 07:21:26,638 INFO L78 Accepts]: Start accepts. Automaton has 67121 states and 101773 transitions. Word has length 1000 [2022-11-19 07:21:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:26,639 INFO L495 AbstractCegarLoop]: Abstraction has 67121 states and 101773 transitions. [2022-11-19 07:21:26,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 3 states have call successors, (96), 3 states have call predecessors, (96), 3 states have return successors, (95), 3 states have call predecessors, (95), 3 states have call successors, (95) [2022-11-19 07:21:26,639 INFO L276 IsEmpty]: Start isEmpty. Operand 67121 states and 101773 transitions. [2022-11-19 07:21:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1008 [2022-11-19 07:21:26,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:26,924 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:26,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:21:27,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:27,140 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:21:27,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:27,141 INFO L85 PathProgramCache]: Analyzing trace with hash -26318052, now seen corresponding path program 1 times [2022-11-19 07:21:27,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:27,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391342662] [2022-11-19 07:21:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:27,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 18583 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18554 trivial. 0 not checked. [2022-11-19 07:21:29,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:29,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391342662] [2022-11-19 07:21:29,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391342662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:21:29,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:21:29,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:21:29,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841229816] [2022-11-19 07:21:29,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:21:29,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:21:29,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:21:29,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:21:29,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:21:29,017 INFO L87 Difference]: Start difference. First operand 67121 states and 101773 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2022-11-19 07:21:31,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:35,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:36,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:39,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:21:41,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:44,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:21:46,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:21:48,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:50,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:21:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:54,731 INFO L93 Difference]: Finished difference Result 133857 states and 202992 transitions. [2022-11-19 07:21:54,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:21:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) Word has length 1007 [2022-11-19 07:21:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:55,122 INFO L225 Difference]: With dead ends: 133857 [2022-11-19 07:21:55,122 INFO L226 Difference]: Without dead ends: 67143 [2022-11-19 07:21:55,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:21:55,257 INFO L413 NwaCegarLoop]: 2635 mSDtfsCounter, 0 mSDsluCounter, 2633 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5268 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:55,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5268 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 654 Invalid, 6 Unknown, 0 Unchecked, 23.9s Time] [2022-11-19 07:21:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67143 states. [2022-11-19 07:21:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67143 to 67143. [2022-11-19 07:21:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67143 states, 48637 states have (on average 1.453543598494973) internal successors, (70696), 49114 states have internal predecessors, (70696), 15124 states have call successors, (15124), 3378 states have call predecessors, (15124), 3381 states have return successors, (15975), 15003 states have call predecessors, (15975), 15123 states have call successors, (15975) [2022-11-19 07:21:57,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67143 states to 67143 states and 101795 transitions. [2022-11-19 07:21:57,772 INFO L78 Accepts]: Start accepts. Automaton has 67143 states and 101795 transitions. Word has length 1007 [2022-11-19 07:21:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:57,773 INFO L495 AbstractCegarLoop]: Abstraction has 67143 states and 101795 transitions. [2022-11-19 07:21:57,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2022-11-19 07:21:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 67143 states and 101795 transitions. [2022-11-19 07:21:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1009 [2022-11-19 07:21:57,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:57,810 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:57,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:21:57,810 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:21:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:57,811 INFO L85 PathProgramCache]: Analyzing trace with hash 509220144, now seen corresponding path program 1 times [2022-11-19 07:21:57,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:21:57,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460419361] [2022-11-19 07:21:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:57,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:21:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18584 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 18554 trivial. 0 not checked. [2022-11-19 07:21:59,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:21:59,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460419361] [2022-11-19 07:21:59,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460419361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:21:59,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350804261] [2022-11-19 07:21:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:59,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:59,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:21:59,621 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:21:59,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:22:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:03,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 10561 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:22:03,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18584 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18584 trivial. 0 not checked. [2022-11-19 07:22:05,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:05,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350804261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:05,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:22:05,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-19 07:22:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493629973] [2022-11-19 07:22:05,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:05,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:22:05,539 INFO L87 Difference]: Start difference. First operand 67143 states and 101795 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2022-11-19 07:22:07,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:09,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:11,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:14,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:22:16,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:20,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:22:21,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:23,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:28,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:28,390 INFO L93 Difference]: Finished difference Result 73933 states and 112012 transitions. [2022-11-19 07:22:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:28,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) Word has length 1008 [2022-11-19 07:22:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:28,757 INFO L225 Difference]: With dead ends: 73933 [2022-11-19 07:22:28,757 INFO L226 Difference]: Without dead ends: 73714 [2022-11-19 07:22:28,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1011 GetRequests, 1008 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:22:28,780 INFO L413 NwaCegarLoop]: 3090 mSDtfsCounter, 2479 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2493 SdHoareTripleChecker+Valid, 5524 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:28,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2493 Valid, 5524 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 662 Invalid, 6 Unknown, 0 Unchecked, 21.5s Time] [2022-11-19 07:22:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73714 states. [2022-11-19 07:22:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73714 to 72685. [2022-11-19 07:22:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72685 states, 52632 states have (on average 1.4535263717890257) internal successors, (76502), 53149 states have internal predecessors, (76502), 16395 states have call successors, (16395), 3654 states have call predecessors, (16395), 3657 states have return successors, (17306), 16261 states have call predecessors, (17306), 16394 states have call successors, (17306) [2022-11-19 07:22:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72685 states to 72685 states and 110203 transitions. [2022-11-19 07:22:31,170 INFO L78 Accepts]: Start accepts. Automaton has 72685 states and 110203 transitions. Word has length 1008 [2022-11-19 07:22:31,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:31,171 INFO L495 AbstractCegarLoop]: Abstraction has 72685 states and 110203 transitions. [2022-11-19 07:22:31,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 2 states have call successors, (96), 2 states have call predecessors, (96), 1 states have return successors, (95), 1 states have call predecessors, (95), 1 states have call successors, (95) [2022-11-19 07:22:31,171 INFO L276 IsEmpty]: Start isEmpty. Operand 72685 states and 110203 transitions. [2022-11-19 07:22:31,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2022-11-19 07:22:31,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:31,524 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:31,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 07:22:31,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:22:31,731 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:31,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:31,732 INFO L85 PathProgramCache]: Analyzing trace with hash -577514721, now seen corresponding path program 1 times [2022-11-19 07:22:31,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:31,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729242974] [2022-11-19 07:22:31,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:31,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:32,115 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:22:32,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121751610] [2022-11-19 07:22:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:32,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:32,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:32,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:22:32,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:22:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:36,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 11872 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:22:36,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18627 backedges. 1778 proven. 0 refuted. 0 times theorem prover too weak. 16849 trivial. 0 not checked. [2022-11-19 07:22:36,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:36,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:36,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729242974] [2022-11-19 07:22:36,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:22:36,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121751610] [2022-11-19 07:22:36,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121751610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:36,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:36,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:22:36,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730850163] [2022-11-19 07:22:36,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:36,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:36,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:36,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:36,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:36,919 INFO L87 Difference]: Start difference. First operand 72685 states and 110203 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2022-11-19 07:22:38,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:42,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:45,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:22:47,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:22:49,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:52,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:22:54,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:56,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:22:59,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:03,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:03,902 INFO L93 Difference]: Finished difference Result 116874 states and 177318 transitions. [2022-11-19 07:23:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:23:03,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 1066 [2022-11-19 07:23:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:04,240 INFO L225 Difference]: With dead ends: 116874 [2022-11-19 07:23:04,241 INFO L226 Difference]: Without dead ends: 91872 [2022-11-19 07:23:04,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 1064 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:04,457 INFO L413 NwaCegarLoop]: 3344 mSDtfsCounter, 2469 mSDsluCounter, 2604 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2483 SdHoareTripleChecker+Valid, 5948 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:04,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2483 Valid, 5948 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 701 Invalid, 7 Unknown, 0 Unchecked, 25.1s Time] [2022-11-19 07:23:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91872 states. [2022-11-19 07:23:07,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91872 to 91137. [2022-11-19 07:23:07,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91137 states, 65964 states have (on average 1.45326238554363) internal successors, (95863), 66609 states have internal predecessors, (95863), 20560 states have call successors, (20560), 4606 states have call predecessors, (20560), 4612 states have return successors, (21869), 20392 states have call predecessors, (21869), 20559 states have call successors, (21869) [2022-11-19 07:23:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91137 states to 91137 states and 138292 transitions. [2022-11-19 07:23:07,675 INFO L78 Accepts]: Start accepts. Automaton has 91137 states and 138292 transitions. Word has length 1066 [2022-11-19 07:23:07,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:07,676 INFO L495 AbstractCegarLoop]: Abstraction has 91137 states and 138292 transitions. [2022-11-19 07:23:07,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2022-11-19 07:23:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 91137 states and 138292 transitions. [2022-11-19 07:23:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1085 [2022-11-19 07:23:08,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:08,066 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:08,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:08,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:23:08,277 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:08,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1921172194, now seen corresponding path program 1 times [2022-11-19 07:23:08,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:08,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820225437] [2022-11-19 07:23:08,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:08,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:08,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:23:08,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319451917] [2022-11-19 07:23:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:08,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:08,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:08,630 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:23:08,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:23:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:12,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 11935 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:23:13,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:15,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18635 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18635 trivial. 0 not checked. [2022-11-19 07:23:15,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:15,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:15,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820225437] [2022-11-19 07:23:15,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:23:15,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319451917] [2022-11-19 07:23:15,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319451917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:15,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:15,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:23:15,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866094244] [2022-11-19 07:23:15,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:15,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:15,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:15,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:15,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:15,420 INFO L87 Difference]: Start difference. First operand 91137 states and 138292 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 2 states have call successors, (110), 2 states have call predecessors, (110), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2022-11-19 07:23:17,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:19,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:22,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:24,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:27,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:29,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:23:31,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:33,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:37,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:42,121 INFO L93 Difference]: Finished difference Result 128767 states and 195419 transitions. [2022-11-19 07:23:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:23:42,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 2 states have call successors, (110), 2 states have call predecessors, (110), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) Word has length 1084 [2022-11-19 07:23:42,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:42,606 INFO L225 Difference]: With dead ends: 128767 [2022-11-19 07:23:42,606 INFO L226 Difference]: Without dead ends: 128545 [2022-11-19 07:23:42,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 1082 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:42,653 INFO L413 NwaCegarLoop]: 3121 mSDtfsCounter, 2510 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2524 SdHoareTripleChecker+Valid, 5555 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:42,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2524 Valid, 5555 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 660 Invalid, 7 Unknown, 0 Unchecked, 24.1s Time] [2022-11-19 07:23:42,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128545 states. [2022-11-19 07:23:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128545 to 116779. [2022-11-19 07:23:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116779 states, 84570 states have (on average 1.453245831855268) internal successors, (122901), 85405 states have internal predecessors, (122901), 26290 states have call successors, (26290), 5912 states have call predecessors, (26290), 5918 states have return successors, (28025), 26070 states have call predecessors, (28025), 26289 states have call successors, (28025) [2022-11-19 07:23:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116779 states to 116779 states and 177216 transitions. [2022-11-19 07:23:47,374 INFO L78 Accepts]: Start accepts. Automaton has 116779 states and 177216 transitions. Word has length 1084 [2022-11-19 07:23:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:47,376 INFO L495 AbstractCegarLoop]: Abstraction has 116779 states and 177216 transitions. [2022-11-19 07:23:47,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 2 states have call successors, (110), 2 states have call predecessors, (110), 1 states have return successors, (109), 1 states have call predecessors, (109), 1 states have call successors, (109) [2022-11-19 07:23:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 116779 states and 177216 transitions. [2022-11-19 07:23:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2022-11-19 07:23:47,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:47,487 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:47,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:47,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:23:47,698 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:23:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:47,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1959416330, now seen corresponding path program 1 times [2022-11-19 07:23:47,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:23:47,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024419473] [2022-11-19 07:23:47,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:47,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:23:48,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 07:23:48,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103232803] [2022-11-19 07:23:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:48,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:48,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:48,385 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:23:48,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:23:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:52,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 11346 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:23:52,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18669 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18669 trivial. 0 not checked. [2022-11-19 07:23:55,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:55,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:23:55,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024419473] [2022-11-19 07:23:55,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 07:23:55,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103232803] [2022-11-19 07:23:55,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103232803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:55,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:55,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:23:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667494776] [2022-11-19 07:23:55,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:55,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:55,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:23:55,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:55,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:55,116 INFO L87 Difference]: Start difference. First operand 116779 states and 177216 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2022-11-19 07:23:57,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:23:58,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:01,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:03,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:24:05,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:09,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:24:11,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:13,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:17,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:22,302 INFO L93 Difference]: Finished difference Result 135521 states and 205655 transitions. [2022-11-19 07:24:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:22,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 1069 [2022-11-19 07:24:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:22,831 INFO L225 Difference]: With dead ends: 135521 [2022-11-19 07:24:22,831 INFO L226 Difference]: Without dead ends: 135302 [2022-11-19 07:24:22,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1068 GetRequests, 1067 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:22,881 INFO L413 NwaCegarLoop]: 3078 mSDtfsCounter, 2477 mSDsluCounter, 2434 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2491 SdHoareTripleChecker+Valid, 5512 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:22,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2491 Valid, 5512 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 651 Invalid, 7 Unknown, 0 Unchecked, 24.4s Time] [2022-11-19 07:24:22,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135302 states. [2022-11-19 07:24:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135302 to 133935. [2022-11-19 07:24:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133935 states, 96913 states have (on average 1.4530764706489325) internal successors, (140822), 97870 states have internal predecessors, (140822), 30228 states have call successors, (30228), 6787 states have call predecessors, (30228), 6793 states have return successors, (32311), 29968 states have call predecessors, (32311), 30227 states have call successors, (32311) [2022-11-19 07:24:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133935 states to 133935 states and 203361 transitions. [2022-11-19 07:24:27,868 INFO L78 Accepts]: Start accepts. Automaton has 133935 states and 203361 transitions. Word has length 1069 [2022-11-19 07:24:27,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:27,868 INFO L495 AbstractCegarLoop]: Abstraction has 133935 states and 203361 transitions. [2022-11-19 07:24:27,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 2 states have internal predecessors, (203), 2 states have call successors, (100), 2 states have call predecessors, (100), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2022-11-19 07:24:27,869 INFO L276 IsEmpty]: Start isEmpty. Operand 133935 states and 203361 transitions. [2022-11-19 07:24:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1082 [2022-11-19 07:24:27,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:27,989 INFO L195 NwaCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 61, 8, 8, 8, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:28,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:28,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:28,190 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:24:28,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1251538417, now seen corresponding path program 1 times [2022-11-19 07:24:28,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:24:28,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119998271] [2022-11-19 07:24:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:28,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:24:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18628 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 18583 trivial. 0 not checked. [2022-11-19 07:24:30,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:24:30,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119998271] [2022-11-19 07:24:30,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119998271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:24:30,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139436666] [2022-11-19 07:24:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:30,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:30,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:30,347 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:30,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aecff80-57b2-48f8-99c2-b4699a830487/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:24:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:34,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 11778 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:24:34,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18628 backedges. 1778 proven. 0 refuted. 0 times theorem prover too weak. 16850 trivial. 0 not checked. [2022-11-19 07:24:35,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:35,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139436666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:35,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:24:35,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-19 07:24:35,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780120352] [2022-11-19 07:24:35,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:35,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:35,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:24:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:35,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:35,221 INFO L87 Difference]: Start difference. First operand 133935 states and 203361 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) [2022-11-19 07:24:37,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:39,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:41,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:45,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:24:47,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:50,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 07:24:52,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:54,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:24:57,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:03,194 INFO L93 Difference]: Finished difference Result 247947 states and 376198 transitions. [2022-11-19 07:25:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:25:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 3 states have call successors, (105), 3 states have call predecessors, (105), 2 states have return successors, (104), 2 states have call predecessors, (104), 2 states have call successors, (104) Word has length 1081 [2022-11-19 07:25:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:03,793 INFO L225 Difference]: With dead ends: 247947 [2022-11-19 07:25:03,793 INFO L226 Difference]: Without dead ends: 148140 [2022-11-19 07:25:04,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1084 GetRequests, 1081 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:25:04,047 INFO L413 NwaCegarLoop]: 3349 mSDtfsCounter, 2475 mSDsluCounter, 2604 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2489 SdHoareTripleChecker+Valid, 5953 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:04,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2489 Valid, 5953 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 701 Invalid, 7 Unknown, 0 Unchecked, 24.2s Time] [2022-11-19 07:25:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148140 states. [2022-11-19 07:25:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148140 to 146711. [2022-11-19 07:25:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146711 states, 106182 states have (on average 1.4529675462884482) internal successors, (154279), 107227 states have internal predecessors, (154279), 33088 states have call successors, (33088), 7434 states have call predecessors, (33088), 7440 states have return successors, (35219), 32803 states have call predecessors, (35219), 33087 states have call successors, (35219)