./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh --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 32bit --witnessprinter.graph.data.programhash d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 --- 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-2329fc7 [2022-12-14 03:08:42,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:08:42,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:08:42,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:08:42,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:08:42,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:08:42,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:08:42,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:08:42,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:08:42,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:08:42,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:08:42,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:08:42,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:08:42,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:08:42,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:08:42,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:08:42,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:08:42,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:08:42,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:08:42,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:08:42,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:08:42,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:08:42,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:08:42,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:08:42,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:08:42,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:08:42,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:08:42,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:08:42,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:08:42,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:08:42,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:08:42,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:08:42,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:08:42,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:08:42,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:08:42,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:08:42,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:08:42,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:08:42,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:08:42,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:08:42,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:08:42,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 03:08:42,254 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:08:42,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:08:42,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:08:42,255 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:08:42,255 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:08:42,255 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:08:42,255 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:08:42,255 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:08:42,256 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:08:42,256 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 03:08:42,256 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:08:42,256 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:08:42,256 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 03:08:42,256 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 03:08:42,256 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:08:42,256 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 03:08:42,257 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 03:08:42,257 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 03:08:42,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:08:42,257 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:08:42,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 03:08:42,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:08:42,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:08:42,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 03:08:42,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:08:42,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 03:08:42,258 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:08:42,258 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 03:08:42,258 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:08:42,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 03:08:42,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:08:42,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:08:42,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:08:42,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:08:42,259 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 03:08:42,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:08:42,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 03:08:42,259 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 03:08:42,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 03:08:42,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 03:08:42,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:08:42,260 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_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 [2022-12-14 03:08:42,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:08:42,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:08:42,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:08:42,451 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:08:42,452 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:08:42,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2022-12-14 03:08:45,130 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:08:45,260 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:08:45,260 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2022-12-14 03:08:45,264 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/data/03e480234/1a377150bbc34ff79fcdb79ae359d7b0/FLAG07f9ef7ec [2022-12-14 03:08:45,274 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/data/03e480234/1a377150bbc34ff79fcdb79ae359d7b0 [2022-12-14 03:08:45,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:08:45,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:08:45,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:08:45,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:08:45,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:08:45,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e0c6e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45, skipping insertion in model container [2022-12-14 03:08:45,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:08:45,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:08:45,416 WARN L237 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_552dc9c9-3ca1-4669-989e-e28cb05d2c92/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2022-12-14 03:08:45,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:08:45,446 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:08:45,456 WARN L237 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_552dc9c9-3ca1-4669-989e-e28cb05d2c92/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c[588,601] [2022-12-14 03:08:45,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:08:45,478 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:08:45,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45 WrapperNode [2022-12-14 03:08:45,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:08:45,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:08:45,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:08:45,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:08:45,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,505 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-12-14 03:08:45,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:08:45,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:08:45,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:08:45,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:08:45,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,519 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:08:45,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:08:45,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:08:45,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:08:45,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (1/1) ... [2022-12-14 03:08:45,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:08:45,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:45,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:08:45,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:08:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 03:08:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 03:08:45,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:08:45,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:08:45,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 03:08:45,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 03:08:45,619 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:08:45,621 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:08:45,743 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:08:45,769 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:08:45,769 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 03:08:45,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:08:45 BoogieIcfgContainer [2022-12-14 03:08:45,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:08:45,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:08:45,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:08:45,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:08:45,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:08:45" (1/3) ... [2022-12-14 03:08:45,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4a7d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:08:45, skipping insertion in model container [2022-12-14 03:08:45,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:08:45" (2/3) ... [2022-12-14 03:08:45,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4a7d44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:08:45, skipping insertion in model container [2022-12-14 03:08:45,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:08:45" (3/3) ... [2022-12-14 03:08:45,777 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound20.c [2022-12-14 03:08:45,791 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:08:45,791 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 03:08:45,824 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:08:45,829 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;@1e74acf2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:08:45,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 03:08:45,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 03:08:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 03:08:45,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:45,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 03:08:45,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1070258279, now seen corresponding path program 1 times [2022-12-14 03:08:45,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:45,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029371720] [2022-12-14 03:08:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:45,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:08:46,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:46,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029371720] [2022-12-14 03:08:46,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029371720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:46,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:08:46,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 03:08:46,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15322777] [2022-12-14 03:08:46,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:46,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:08:46,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:46,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:08:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 03:08:46,126 INFO L87 Difference]: Start difference. First operand has 22 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:46,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:46,229 INFO L93 Difference]: Finished difference Result 47 states and 82 transitions. [2022-12-14 03:08:46,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:08:46,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 03:08:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:46,237 INFO L225 Difference]: With dead ends: 47 [2022-12-14 03:08:46,237 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 03:08:46,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 03:08:46,242 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:46,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:08:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 03:08:46,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-14 03:08:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 03:08:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2022-12-14 03:08:46,275 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 6 [2022-12-14 03:08:46,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:46,275 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2022-12-14 03:08:46,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:08:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2022-12-14 03:08:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 03:08:46,277 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:46,277 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:46,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 03:08:46,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:46,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:46,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1088770990, now seen corresponding path program 1 times [2022-12-14 03:08:46,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:46,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942664309] [2022-12-14 03:08:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:46,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:46,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:08:46,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908548755] [2022-12-14 03:08:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:46,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:46,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:46,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:46,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 03:08:46,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:46,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 03:08:46,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:08:46,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:08:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:08:46,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:46,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942664309] [2022-12-14 03:08:46,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:08:46,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908548755] [2022-12-14 03:08:46,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908548755] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:08:46,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1178845045] [2022-12-14 03:08:46,550 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 03:08:46,550 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:08:46,553 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:08:46,557 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:08:46,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:08:46,727 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-12-14 03:08:46,739 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:08:46,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1178845045] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:08:46,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:08:46,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 7] total 15 [2022-12-14 03:08:46,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176617333] [2022-12-14 03:08:46,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:08:46,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:08:46,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:46,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:08:46,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-14 03:08:46,977 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 03:08:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:47,088 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-12-14 03:08:47,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:08:47,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 03:08:47,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:47,090 INFO L225 Difference]: With dead ends: 55 [2022-12-14 03:08:47,090 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 03:08:47,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-12-14 03:08:47,092 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:47,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:08:47,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 03:08:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-14 03:08:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 03:08:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-12-14 03:08:47,109 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 11 [2022-12-14 03:08:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:47,110 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-12-14 03:08:47,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 03:08:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-12-14 03:08:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 03:08:47,111 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:47,111 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:47,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:08:47,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:47,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:47,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:47,316 INFO L85 PathProgramCache]: Analyzing trace with hash -700920967, now seen corresponding path program 1 times [2022-12-14 03:08:47,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:47,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8994849] [2022-12-14 03:08:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:47,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:47,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:08:47,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355347859] [2022-12-14 03:08:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:47,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:47,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:47,369 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:47,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 03:08:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:08:47,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 03:08:47,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 03:08:47,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:08:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 03:08:47,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:47,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8994849] [2022-12-14 03:08:47,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:08:47,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355347859] [2022-12-14 03:08:47,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355347859] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:08:47,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [731739141] [2022-12-14 03:08:47,724 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 03:08:47,724 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:08:47,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:08:47,725 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:08:47,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:08:50,959 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-12-14 03:08:50,966 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:08:52,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '602#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:08:52,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:08:52,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:08:52,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-12-14 03:08:52,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627149033] [2022-12-14 03:08:52,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:08:52,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 03:08:52,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:52,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 03:08:52,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-12-14 03:08:52,447 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 03:08:52,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:52,762 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2022-12-14 03:08:52,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 03:08:52,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 38 [2022-12-14 03:08:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:52,765 INFO L225 Difference]: With dead ends: 62 [2022-12-14 03:08:52,765 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 03:08:52,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-12-14 03:08:52,767 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:52,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 41 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:08:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 03:08:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2022-12-14 03:08:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 03:08:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-12-14 03:08:52,781 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 38 [2022-12-14 03:08:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:52,781 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-12-14 03:08:52,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 03:08:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-12-14 03:08:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 03:08:52,782 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:52,782 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:52,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 03:08:52,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:52,984 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:52,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:52,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1757443022, now seen corresponding path program 2 times [2022-12-14 03:08:52,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:52,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135498681] [2022-12-14 03:08:52,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:52,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:53,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:08:53,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451162816] [2022-12-14 03:08:53,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:08:53,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:53,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:53,005 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:53,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 03:08:53,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 03:08:53,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:08:53,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 03:08:53,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 03:08:53,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:08:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 03:08:53,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:53,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135498681] [2022-12-14 03:08:53,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:08:53,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451162816] [2022-12-14 03:08:53,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451162816] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:08:53,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [204123976] [2022-12-14 03:08:53,162 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 03:08:53,162 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:08:53,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:08:53,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:08:53,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:08:55,946 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 03:08:55,950 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:08:56,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1051#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:08:56,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:08:56,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:08:56,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-14 03:08:56,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682041383] [2022-12-14 03:08:56,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:08:56,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 03:08:56,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:08:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 03:08:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-12-14 03:08:56,425 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 03:08:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:08:56,540 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-12-14 03:08:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 03:08:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 43 [2022-12-14 03:08:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:08:56,542 INFO L225 Difference]: With dead ends: 74 [2022-12-14 03:08:56,542 INFO L226 Difference]: Without dead ends: 72 [2022-12-14 03:08:56,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-12-14 03:08:56,543 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:08:56,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 214 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:08:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-14 03:08:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2022-12-14 03:08:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 36 states have internal predecessors, (36), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-12-14 03:08:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-12-14 03:08:56,554 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 43 [2022-12-14 03:08:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:08:56,555 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-12-14 03:08:56,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-12-14 03:08:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-12-14 03:08:56,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 03:08:56,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:08:56,556 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:08:56,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 03:08:56,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:56,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:08:56,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:08:56,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1748922073, now seen corresponding path program 3 times [2022-12-14 03:08:56,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:08:56,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616500438] [2022-12-14 03:08:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:08:56,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:08:56,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:08:56,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128521803] [2022-12-14 03:08:56,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:08:56,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:08:56,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:08:56,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:08:56,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 03:08:56,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:08:56,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:08:56,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 03:08:56,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:08:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 03:08:56,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:08:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 03:08:57,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:08:57,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616500438] [2022-12-14 03:08:57,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:08:57,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128521803] [2022-12-14 03:08:57,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128521803] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:08:57,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642595957] [2022-12-14 03:08:57,164 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 03:08:57,164 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:08:57,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:08:57,164 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:08:57,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:08:59,916 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 03:08:59,919 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:09:00,854 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1565#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:09:00,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:09:00,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:09:00,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-12-14 03:09:00,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993930569] [2022-12-14 03:09:00,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:09:00,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 03:09:00,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:00,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 03:09:00,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-12-14 03:09:00,856 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 03:09:01,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:01,764 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-12-14 03:09:01,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 03:09:01,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 48 [2022-12-14 03:09:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:01,766 INFO L225 Difference]: With dead ends: 82 [2022-12-14 03:09:01,766 INFO L226 Difference]: Without dead ends: 74 [2022-12-14 03:09:01,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-12-14 03:09:01,768 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:01,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 54 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 03:09:01,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-14 03:09:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2022-12-14 03:09:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.05) internal successors, (42), 42 states have internal predecessors, (42), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 03:09:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-12-14 03:09:01,789 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 48 [2022-12-14 03:09:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:01,790 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-12-14 03:09:01,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-12-14 03:09:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-12-14 03:09:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 03:09:01,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:01,792 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:09:01,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 03:09:01,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:01,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:01,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2025080784, now seen corresponding path program 1 times [2022-12-14 03:09:01,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:01,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455078666] [2022-12-14 03:09:01,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:01,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:02,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:09:02,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625702946] [2022-12-14 03:09:02,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:02,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:02,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:02,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:02,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 03:09:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:02,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 03:09:02,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:09:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 03:09:02,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:09:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-12-14 03:09:02,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455078666] [2022-12-14 03:09:02,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:09:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625702946] [2022-12-14 03:09:02,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625702946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:09:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1080066132] [2022-12-14 03:09:02,333 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 03:09:02,333 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:09:02,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:09:02,334 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:09:02,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:09:04,746 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-12-14 03:09:04,769 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:09:05,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2192#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:09:05,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:09:05,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:09:05,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-12-14 03:09:05,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800100004] [2022-12-14 03:09:05,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:09:05,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 03:09:05,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:05,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 03:09:05,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-12-14 03:09:05,973 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-12-14 03:09:06,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:06,442 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-12-14 03:09:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 03:09:06,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 64 [2022-12-14 03:09:06,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:06,444 INFO L225 Difference]: With dead ends: 94 [2022-12-14 03:09:06,444 INFO L226 Difference]: Without dead ends: 92 [2022-12-14 03:09:06,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-12-14 03:09:06,446 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:06,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 149 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 03:09:06,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-14 03:09:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-12-14 03:09:06,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 03:09:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-12-14 03:09:06,467 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 64 [2022-12-14 03:09:06,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:06,467 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-12-14 03:09:06,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-12-14 03:09:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-12-14 03:09:06,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 03:09:06,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:06,468 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:09:06,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 03:09:06,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:06,670 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:06,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:06,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1309118309, now seen corresponding path program 1 times [2022-12-14 03:09:06,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:06,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285463063] [2022-12-14 03:09:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:06,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:06,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:09:06,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170493521] [2022-12-14 03:09:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:06,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:06,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:06,686 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:06,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 03:09:06,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:06,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 03:09:06,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:09:06,846 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-12-14 03:09:06,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:09:06,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:06,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285463063] [2022-12-14 03:09:06,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:09:06,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170493521] [2022-12-14 03:09:06,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170493521] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:09:06,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1317949120] [2022-12-14 03:09:06,969 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 03:09:06,969 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:09:06,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:09:06,970 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:09:06,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:09:09,479 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-12-14 03:09:09,503 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:09:10,964 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2826#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:09:10,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:09:10,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:09:10,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-12-14 03:09:10,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300462137] [2022-12-14 03:09:10,964 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 03:09:10,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 03:09:10,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:10,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 03:09:10,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-12-14 03:09:10,966 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 03:09:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:11,088 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2022-12-14 03:09:11,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 03:09:11,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 69 [2022-12-14 03:09:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:11,090 INFO L225 Difference]: With dead ends: 97 [2022-12-14 03:09:11,090 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 03:09:11,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-12-14 03:09:11,091 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:11,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 101 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:09:11,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 03:09:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 03:09:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 51 states have internal predecessors, (52), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 03:09:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2022-12-14 03:09:11,111 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 69 [2022-12-14 03:09:11,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:11,111 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2022-12-14 03:09:11,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 03:09:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2022-12-14 03:09:11,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 03:09:11,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:11,112 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-12-14 03:09:11,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 03:09:11,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:11,314 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash 33509209, now seen corresponding path program 4 times [2022-12-14 03:09:11,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:11,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746457913] [2022-12-14 03:09:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:11,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:11,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:09:11,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749907139] [2022-12-14 03:09:11,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 03:09:11,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:11,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:11,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:11,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 03:09:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:09:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 03:09:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:09:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 52 proven. 47 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-12-14 03:09:11,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:09:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 52 proven. 47 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-12-14 03:09:11,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:11,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746457913] [2022-12-14 03:09:11,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:09:11,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749907139] [2022-12-14 03:09:11,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749907139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:09:11,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [606934631] [2022-12-14 03:09:11,754 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 03:09:11,754 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:09:11,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:09:11,754 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:09:11,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:09:14,490 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 03:09:14,493 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:09:15,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3548#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:09:15,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:09:15,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:09:15,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-12-14 03:09:15,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144990761] [2022-12-14 03:09:15,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:09:15,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 03:09:15,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:15,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 03:09:15,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-12-14 03:09:15,045 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-12-14 03:09:17,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:09:19,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 03:09:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:19,237 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-12-14 03:09:19,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 03:09:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 70 [2022-12-14 03:09:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:19,239 INFO L225 Difference]: With dead ends: 110 [2022-12-14 03:09:19,239 INFO L226 Difference]: Without dead ends: 108 [2022-12-14 03:09:19,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 03:09:19,240 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:19,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 61 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 465 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 03:09:19,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-14 03:09:19,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2022-12-14 03:09:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 57 states have internal predecessors, (58), 25 states have call successors, (25), 15 states have call predecessors, (25), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 03:09:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2022-12-14 03:09:19,266 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 70 [2022-12-14 03:09:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:19,266 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2022-12-14 03:09:19,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-12-14 03:09:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2022-12-14 03:09:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 03:09:19,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:19,267 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:09:19,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 03:09:19,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:19,469 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:19,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:19,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1760296702, now seen corresponding path program 2 times [2022-12-14 03:09:19,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:19,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081463976] [2022-12-14 03:09:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:19,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:19,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:09:19,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653432094] [2022-12-14 03:09:19,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:09:19,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:19,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:19,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:19,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 03:09:19,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 03:09:19,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:09:19,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 03:09:19,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:09:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-12-14 03:09:20,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:09:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-12-14 03:09:21,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:21,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081463976] [2022-12-14 03:09:21,132 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:09:21,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653432094] [2022-12-14 03:09:21,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653432094] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:09:21,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701732304] [2022-12-14 03:09:21,134 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 03:09:21,134 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:09:21,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:09:21,134 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:09:21,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:09:23,838 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-12-14 03:09:23,859 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:09:25,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4471#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:09:25,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:09:25,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:09:25,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-12-14 03:09:25,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981722487] [2022-12-14 03:09:25,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:09:25,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 03:09:25,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:25,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 03:09:25,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2022-12-14 03:09:25,800 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 10 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2022-12-14 03:09:33,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:33,378 INFO L93 Difference]: Finished difference Result 147 states and 172 transitions. [2022-12-14 03:09:33,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 03:09:33,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 10 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) Word has length 96 [2022-12-14 03:09:33,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:33,380 INFO L225 Difference]: With dead ends: 147 [2022-12-14 03:09:33,380 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 03:09:33,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 03:09:33,382 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:33,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 03:09:33,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 03:09:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-12-14 03:09:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 75 states have internal predecessors, (78), 40 states have call successors, (40), 19 states have call predecessors, (40), 19 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-12-14 03:09:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 156 transitions. [2022-12-14 03:09:33,442 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 156 transitions. Word has length 96 [2022-12-14 03:09:33,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:33,443 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 156 transitions. [2022-12-14 03:09:33,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 10 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 8 states have call predecessors, (34), 8 states have call successors, (34) [2022-12-14 03:09:33,443 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 156 transitions. [2022-12-14 03:09:33,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 03:09:33,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:33,445 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:09:33,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 03:09:33,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:33,647 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:33,648 INFO L85 PathProgramCache]: Analyzing trace with hash 74939536, now seen corresponding path program 2 times [2022-12-14 03:09:33,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:33,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844799230] [2022-12-14 03:09:33,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:33,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:33,678 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:09:33,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939288380] [2022-12-14 03:09:33,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:09:33,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:33,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:33,682 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:33,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 03:09:34,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 03:09:34,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:09:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 03:09:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:09:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-12-14 03:09:34,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:09:34,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:34,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844799230] [2022-12-14 03:09:34,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:09:34,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939288380] [2022-12-14 03:09:34,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939288380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:09:34,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [995667819] [2022-12-14 03:09:34,281 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 03:09:34,281 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:09:34,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:09:34,282 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:09:34,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:09:37,489 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-12-14 03:09:37,491 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:09:38,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5295#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:09:38,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:09:38,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:09:38,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-12-14 03:09:38,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37870116] [2022-12-14 03:09:38,231 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 03:09:38,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 03:09:38,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:38,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 03:09:38,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-12-14 03:09:38,232 INFO L87 Difference]: Start difference. First operand 133 states and 156 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 03:09:38,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:38,423 INFO L93 Difference]: Finished difference Result 139 states and 161 transitions. [2022-12-14 03:09:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 03:09:38,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 118 [2022-12-14 03:09:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:38,424 INFO L225 Difference]: With dead ends: 139 [2022-12-14 03:09:38,424 INFO L226 Difference]: Without dead ends: 133 [2022-12-14 03:09:38,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-12-14 03:09:38,425 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:38,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 27 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:09:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-14 03:09:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-12-14 03:09:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 38 states have call successors, (38), 20 states have call predecessors, (38), 19 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 03:09:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2022-12-14 03:09:38,474 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 118 [2022-12-14 03:09:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:38,475 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2022-12-14 03:09:38,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-12-14 03:09:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2022-12-14 03:09:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-12-14 03:09:38,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:09:38,477 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:09:38,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 03:09:38,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:38,678 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 03:09:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:09:38,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2082635326, now seen corresponding path program 3 times [2022-12-14 03:09:38,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:09:38,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056058796] [2022-12-14 03:09:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:09:38,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:09:38,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 03:09:38,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1824905785] [2022-12-14 03:09:38,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 03:09:38,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:38,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:09:38,711 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:09:38,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 03:09:40,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 03:09:40,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:09:40,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-14 03:09:40,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:09:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 583 proven. 336 refuted. 0 times theorem prover too weak. 1966 trivial. 0 not checked. [2022-12-14 03:09:42,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:09:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 309 proven. 17 refuted. 0 times theorem prover too weak. 2559 trivial. 0 not checked. [2022-12-14 03:09:45,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:09:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056058796] [2022-12-14 03:09:45,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 03:09:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824905785] [2022-12-14 03:09:45,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824905785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:09:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714435423] [2022-12-14 03:09:45,206 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 03:09:45,206 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:09:45,206 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:09:45,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:09:45,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:09:47,820 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-12-14 03:09:47,850 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:09:53,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6952#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:09:53,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:09:53,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 03:09:53,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2022-12-14 03:09:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349397601] [2022-12-14 03:09:53,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 03:09:53,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 03:09:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:09:53,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 03:09:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2022-12-14 03:09:53,030 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) [2022-12-14 03:09:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:09:53,935 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2022-12-14 03:09:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 03:09:53,936 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) Word has length 204 [2022-12-14 03:09:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:09:53,937 INFO L225 Difference]: With dead ends: 133 [2022-12-14 03:09:53,937 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 03:09:53,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 578 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 03:09:53,938 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:09:53,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 03:09:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 03:09:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 03:09:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:09:53,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 03:09:53,938 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2022-12-14 03:09:53,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:09:53,938 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 03:09:53,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 11 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 9 states have call predecessors, (30), 11 states have call successors, (30) [2022-12-14 03:09:53,939 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 03:09:53,939 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 03:09:53,940 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 03:09:53,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 03:09:54,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:09:54,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 03:10:13,548 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-14 03:10:13,548 INFO L895 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (and (= (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2022-12-14 03:10:13,548 INFO L895 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (let ((.cse0 (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1))) (.cse1 (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24)))) (.cse2 (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse6))) (.cse3 (<= 0 |ULTIMATE.start_main_~a~0#1|)) (.cse5 (<= (+ 6 .cse6) |ULTIMATE.start_main_~z~0#1|))) (or (let ((.cse4 (div (- |ULTIMATE.start_main_~z~0#1|) (- 6)))) (and .cse0 .cse1 .cse2 (<= |ULTIMATE.start_main_~a~0#1| 20) .cse3 (< (+ |ULTIMATE.start_main_~a~0#1| 1) .cse4) (<= .cse4 (+ 2 |ULTIMATE.start_main_~a~0#1|)) .cse5)) (and .cse0 (<= |ULTIMATE.start_main_~a~0#1| 0) (= (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| 12) (* 6 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)))) .cse1 .cse2 .cse3 .cse5)))) [2022-12-14 03:10:13,548 INFO L895 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-12-14 03:10:13,549 INFO L895 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-12-14 03:10:13,549 INFO L895 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse6 (* 6 |ULTIMATE.start_main_~n~0#1|)) (.cse4 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (let ((.cse1 (* 3 |ULTIMATE.start_main_~n~0#1|)) (.cse2 (* 3 .cse4)) (.cse3 (<= 0 |ULTIMATE.start_main_~a~0#1|)) (.cse0 (+ 6 .cse6))) (or (let ((.cse5 (div (- |ULTIMATE.start_main_~z~0#1|) (- 6)))) (and (= |ULTIMATE.start_main_~z~0#1| .cse0) (= (+ .cse1 5 |ULTIMATE.start_main_~y~0#1|) (+ .cse2 |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) .cse3 (= (+ (* 6 .cse4) (* |ULTIMATE.start_main_~n~0#1| 12) (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)) (< (+ |ULTIMATE.start_main_~a~0#1| 1) .cse5) (<= .cse5 (+ 2 |ULTIMATE.start_main_~a~0#1|)))) (and (= |ULTIMATE.start_main_~y~0#1| (+ .cse1 .cse2 1)) (<= |ULTIMATE.start_main_~a~0#1| 0) (= (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| 12) (* 6 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)))) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse6)) .cse3 (<= .cse0 |ULTIMATE.start_main_~z~0#1|))))) [2022-12-14 03:10:13,549 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-14 03:10:13,549 INFO L899 garLoopResultBuilder]: For program point L38(lines 33 46) no Hoare annotation was computed. [2022-12-14 03:10:13,549 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-12-14 03:10:13,549 INFO L895 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (= (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2022-12-14 03:10:13,549 INFO L895 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 .cse0) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse0) (* |ULTIMATE.start_main_~n~0#1| 12) (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)))) [2022-12-14 03:10:13,550 INFO L895 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-12-14 03:10:13,550 INFO L895 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-12-14 03:10:13,550 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (= (+ (* 2 |ULTIMATE.start_main_~y~0#1|) (* 6 |ULTIMATE.start_main_~a~0#1|) 10) (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~z~0#1|) (* 2 |ULTIMATE.start_main_~z~0#1|))) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-12-14 03:10:13,550 INFO L895 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-12-14 03:10:13,550 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 .cse0) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 20) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse0) (* |ULTIMATE.start_main_~n~0#1| 12) (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)))) [2022-12-14 03:10:13,550 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-12-14 03:10:13,550 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-12-14 03:10:13,550 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-12-14 03:10:13,550 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-12-14 03:10:13,551 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 14 20) the Hoare annotation is: true [2022-12-14 03:10:13,551 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-12-14 03:10:13,553 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1, 1] [2022-12-14 03:10:13,554 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 03:10:13,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 03:10:13 BoogieIcfgContainer [2022-12-14 03:10:13,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 03:10:13,564 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 03:10:13,564 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 03:10:13,564 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 03:10:13,564 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:08:45" (3/4) ... [2022-12-14 03:10:13,566 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 03:10:13,570 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-12-14 03:10:13,572 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-12-14 03:10:13,572 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-12-14 03:10:13,572 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-14 03:10:13,572 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 03:10:13,593 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 03:10:13,593 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 03:10:13,593 INFO L158 Benchmark]: Toolchain (without parser) took 88315.65ms. Allocated memory was 113.2MB in the beginning and 308.3MB in the end (delta: 195.0MB). Free memory was 78.5MB in the beginning and 165.6MB in the end (delta: -87.1MB). Peak memory consumption was 109.6MB. Max. memory is 16.1GB. [2022-12-14 03:10:13,593 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory is still 84.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 03:10:13,593 INFO L158 Benchmark]: CACSL2BoogieTranslator took 200.12ms. Allocated memory is still 113.2MB. Free memory was 78.2MB in the beginning and 67.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 03:10:13,593 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.46ms. Allocated memory is still 113.2MB. Free memory was 67.6MB in the beginning and 65.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 03:10:13,594 INFO L158 Benchmark]: Boogie Preprocessor took 14.76ms. Allocated memory is still 113.2MB. Free memory was 65.9MB in the beginning and 65.0MB in the end (delta: 938.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 03:10:13,594 INFO L158 Benchmark]: RCFGBuilder took 249.69ms. Allocated memory is still 113.2MB. Free memory was 64.6MB in the beginning and 52.1MB in the end (delta: 12.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 03:10:13,594 INFO L158 Benchmark]: TraceAbstraction took 87791.13ms. Allocated memory was 113.2MB in the beginning and 308.3MB in the end (delta: 195.0MB). Free memory was 51.3MB in the beginning and 168.8MB in the end (delta: -117.5MB). Peak memory consumption was 156.4MB. Max. memory is 16.1GB. [2022-12-14 03:10:13,594 INFO L158 Benchmark]: Witness Printer took 28.91ms. Allocated memory is still 308.3MB. Free memory was 168.8MB in the beginning and 165.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 03:10:13,595 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory is still 84.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 200.12ms. Allocated memory is still 113.2MB. Free memory was 78.2MB in the beginning and 67.6MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.46ms. Allocated memory is still 113.2MB. Free memory was 67.6MB in the beginning and 65.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 14.76ms. Allocated memory is still 113.2MB. Free memory was 65.9MB in the beginning and 65.0MB in the end (delta: 938.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 249.69ms. Allocated memory is still 113.2MB. Free memory was 64.6MB in the beginning and 52.1MB in the end (delta: 12.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 87791.13ms. Allocated memory was 113.2MB in the beginning and 308.3MB in the end (delta: 195.0MB). Free memory was 51.3MB in the beginning and 168.8MB in the end (delta: -117.5MB). Peak memory consumption was 156.4MB. Max. memory is 16.1GB. * Witness Printer took 28.91ms. Allocated memory is still 308.3MB. Free memory was 168.8MB in the beginning and 165.6MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 87.7s, OverallIterations: 11, TraceHistogramMax: 38, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 15.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 19.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 178 SdHoareTripleChecker+Valid, 9.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 139 mSDsluCounter, 861 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 593 mSDsCounter, 343 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2686 IncrementalHoareTripleChecker+Invalid, 3030 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 343 mSolverCounterUnsat, 268 mSDtfsCounter, 2686 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2170 GetRequests, 1898 SyntacticMatches, 11 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 25.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=9, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 44 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 83 PreInvPairs, 144 NumberOfFragments, 785 HoareAnnotationTreeSize, 83 FomulaSimplifications, 905 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 14 FomulaSimplificationsInter, 39919 FormulaSimplificationTreeSizeReductionInter, 19.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 767 NumberOfCodeBlocks, 583 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1322 ConstructedInterpolants, 0 QuantifiedInterpolants, 8268 SizeOfPredicates, 45 NumberOfNonLiveVariables, 1467 ConjunctsInSsa, 318 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 9267/9915 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.0s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 15, TOOLS_QUANTIFIERELIM_TIME: 0.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 25, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 50, DAG_COMPRESSION_RETAINED_NODES: 29, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((n * n * n == x && z == 6 + 6 * n) && n <= a + 1) && 3 * n + 5 + y == 3 * (n * n) + z) && a <= 20) && 0 <= a - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: z < 7 + 6 * n && 6 + 6 * n <= z RESULT: Ultimate proved your program to be correct! [2022-12-14 03:10:13,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552dc9c9-3ca1-4669-989e-e28cb05d2c92/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE