./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7 --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 ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:37:04,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:37:04,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:37:04,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:37:04,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:37:04,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:37:04,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:37:04,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:37:04,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:37:04,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:37:04,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:37:04,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:37:04,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:37:04,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:37:04,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:37:04,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:37:04,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:37:04,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:37:04,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:37:04,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:37:04,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:37:04,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:37:04,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:37:04,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:37:04,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:37:04,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:37:04,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:37:04,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:37:04,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:37:04,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:37:04,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:37:04,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:37:04,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:37:04,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:37:04,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:37:04,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:37:04,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:37:04,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:37:04,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:37:04,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:37:04,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:37:04,382 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:37:04,413 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:37:04,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:37:04,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:37:04,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:37:04,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:37:04,422 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:37:04,422 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:37:04,423 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:37:04,423 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:37:04,423 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:37:04,424 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:37:04,425 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:37:04,425 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:37:04,425 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:37:04,425 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:37:04,426 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:37:04,426 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:37:04,426 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:37:04,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:37:04,427 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:37:04,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:37:04,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:37:04,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:37:04,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:37:04,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:37:04,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:37:04,431 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:37:04,432 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:37:04,432 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:37:04,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:37:04,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:37:04,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:37:04,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:37:04,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:37:04,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:37:04,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:37:04,434 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:37:04,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:37:04,435 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:37:04,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:37:04,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:37:04,436 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e [2021-11-25 20:37:04,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:37:04,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:37:04,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:37:04,823 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:37:04,828 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:37:04,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2021-11-25 20:37:04,911 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/data/a37fc3497/a07aa3e41ace4e6ebce01e3e22724936/FLAGd42b1f78b [2021-11-25 20:37:05,627 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:37:05,628 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2021-11-25 20:37:05,651 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/data/a37fc3497/a07aa3e41ace4e6ebce01e3e22724936/FLAGd42b1f78b [2021-11-25 20:37:05,811 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/data/a37fc3497/a07aa3e41ace4e6ebce01e3e22724936 [2021-11-25 20:37:05,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:37:05,816 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:37:05,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:37:05,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:37:05,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:37:05,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5875dcad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:05, skipping insertion in model container [2021-11-25 20:37:05,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:37:05" (1/1) ... [2021-11-25 20:37:05,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:37:05,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:37:06,438 WARN L230 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_626bf899-66d3-4c7f-a444-435f8c7b2634/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i[33022,33035] [2021-11-25 20:37:06,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:37:06,743 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:37:06,775 WARN L230 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_626bf899-66d3-4c7f-a444-435f8c7b2634/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i[33022,33035] [2021-11-25 20:37:06,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:37:06,976 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:37:06,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06 WrapperNode [2021-11-25 20:37:06,976 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:37:06,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:37:06,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:37:06,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:37:07,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06" (1/1) ... [2021-11-25 20:37:07,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06" (1/1) ... [2021-11-25 20:37:07,231 INFO L137 Inliner]: procedures = 177, calls = 524, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2175 [2021-11-25 20:37:07,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:37:07,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:37:07,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:37:07,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:37:07,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06" (1/1) ... [2021-11-25 20:37:07,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06" (1/1) ... [2021-11-25 20:37:07,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06" (1/1) ... [2021-11-25 20:37:07,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06" (1/1) ... [2021-11-25 20:37:07,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06" (1/1) ... [2021-11-25 20:37:07,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06" (1/1) ... [2021-11-25 20:37:07,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06" (1/1) ... [2021-11-25 20:37:07,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:37:07,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:37:07,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:37:07,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:37:07,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06" (1/1) ... [2021-11-25 20:37:07,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:37:07,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:07,524 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:37:07,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:37:07,584 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-25 20:37:07,585 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-25 20:37:07,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:37:07,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 20:37:07,585 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 20:37:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:37:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 20:37:07,586 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 20:37:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:37:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:37:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:37:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:37:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 20:37:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:37:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:37:07,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:37:07,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:37:07,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:37:07,918 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:37:07,920 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:37:09,807 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:37:10,715 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:37:10,716 INFO L301 CfgBuilder]: Removed 151 assume(true) statements. [2021-11-25 20:37:10,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:37:10 BoogieIcfgContainer [2021-11-25 20:37:10,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:37:10,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:37:10,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:37:10,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:37:10,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:37:05" (1/3) ... [2021-11-25 20:37:10,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7597ce5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:37:10, skipping insertion in model container [2021-11-25 20:37:10,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:37:06" (2/3) ... [2021-11-25 20:37:10,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7597ce5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:37:10, skipping insertion in model container [2021-11-25 20:37:10,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:37:10" (3/3) ... [2021-11-25 20:37:10,733 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-1.i [2021-11-25 20:37:10,741 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:37:10,742 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:37:10,809 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:37:10,817 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:37:10,818 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:37:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 251 states, 232 states have (on average 1.8275862068965518) internal successors, (424), 237 states have internal predecessors, (424), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-25 20:37:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 20:37:10,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:10,856 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:10,857 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:10,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:10,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1638918227, now seen corresponding path program 1 times [2021-11-25 20:37:10,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:10,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524905820] [2021-11-25 20:37:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:10,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:37:11,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:11,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524905820] [2021-11-25 20:37:11,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524905820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:11,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:11,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:11,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639849582] [2021-11-25 20:37:11,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:11,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:37:11,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:11,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:37:11,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:37:11,143 INFO L87 Difference]: Start difference. First operand has 251 states, 232 states have (on average 1.8275862068965518) internal successors, (424), 237 states have internal predecessors, (424), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:37:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:12,864 INFO L93 Difference]: Finished difference Result 501 states and 911 transitions. [2021-11-25 20:37:12,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:37:12,866 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 20:37:12,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:12,882 INFO L225 Difference]: With dead ends: 501 [2021-11-25 20:37:12,885 INFO L226 Difference]: Without dead ends: 249 [2021-11-25 20:37:12,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:37:12,900 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:12,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 277 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-25 20:37:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-25 20:37:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-25 20:37:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 231 states have (on average 1.199134199134199) internal successors, (277), 236 states have internal predecessors, (277), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 20:37:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 304 transitions. [2021-11-25 20:37:13,008 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 304 transitions. Word has length 12 [2021-11-25 20:37:13,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:13,009 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 304 transitions. [2021-11-25 20:37:13,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:37:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 304 transitions. [2021-11-25 20:37:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:37:13,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:13,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:13,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:37:13,017 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:13,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:13,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1686223485, now seen corresponding path program 1 times [2021-11-25 20:37:13,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:13,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30986208] [2021-11-25 20:37:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:13,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:37:13,111 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:13,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30986208] [2021-11-25 20:37:13,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30986208] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:13,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:13,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:37:13,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416916121] [2021-11-25 20:37:13,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:13,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:37:13,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:37:13,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:37:13,116 INFO L87 Difference]: Start difference. First operand 249 states and 304 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:37:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:17,456 INFO L93 Difference]: Finished difference Result 425 states and 521 transitions. [2021-11-25 20:37:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:37:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 20:37:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:17,461 INFO L225 Difference]: With dead ends: 425 [2021-11-25 20:37:17,463 INFO L226 Difference]: Without dead ends: 276 [2021-11-25 20:37:17,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:37:17,466 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 27 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:17,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 770 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-25 20:37:17,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-25 20:37:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2021-11-25 20:37:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 233 states have (on average 1.1974248927038627) internal successors, (279), 238 states have internal predecessors, (279), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-25 20:37:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 306 transitions. [2021-11-25 20:37:17,490 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 306 transitions. Word has length 24 [2021-11-25 20:37:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:17,491 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 306 transitions. [2021-11-25 20:37:17,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:37:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 306 transitions. [2021-11-25 20:37:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 20:37:17,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:17,495 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:17,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:37:17,495 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:17,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:17,496 INFO L85 PathProgramCache]: Analyzing trace with hash -873368825, now seen corresponding path program 1 times [2021-11-25 20:37:17,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:17,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167102499] [2021-11-25 20:37:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:17,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:17,722 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:37:17,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560462832] [2021-11-25 20:37:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:17,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:17,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:17,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:17,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:37:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:18,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1676 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:37:18,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:37:18,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:37:18,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:18,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167102499] [2021-11-25 20:37:18,853 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:37:18,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560462832] [2021-11-25 20:37:18,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560462832] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:18,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:18,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:18,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267090383] [2021-11-25 20:37:18,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:18,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:18,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:18,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:18,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:18,856 INFO L87 Difference]: Start difference. First operand 251 states and 306 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:37:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:20,727 INFO L93 Difference]: Finished difference Result 614 states and 746 transitions. [2021-11-25 20:37:20,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:20,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-25 20:37:20,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:20,731 INFO L225 Difference]: With dead ends: 614 [2021-11-25 20:37:20,731 INFO L226 Difference]: Without dead ends: 366 [2021-11-25 20:37:20,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:20,733 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 120 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:20,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 570 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-25 20:37:20,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-25 20:37:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 362. [2021-11-25 20:37:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 339 states have (on average 1.1799410029498525) internal successors, (400), 344 states have internal predecessors, (400), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-25 20:37:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 437 transitions. [2021-11-25 20:37:20,791 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 437 transitions. Word has length 49 [2021-11-25 20:37:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:20,792 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 437 transitions. [2021-11-25 20:37:20,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:37:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 437 transitions. [2021-11-25 20:37:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-25 20:37:20,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:20,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:20,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:21,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:21,026 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:21,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:21,028 INFO L85 PathProgramCache]: Analyzing trace with hash 653553819, now seen corresponding path program 1 times [2021-11-25 20:37:21,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:21,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136993898] [2021-11-25 20:37:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:21,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:21,115 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:37:21,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197022105] [2021-11-25 20:37:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:21,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:21,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:21,121 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:21,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:37:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:21,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:37:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:21,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:37:21,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:37:21,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:37:21,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:37:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:37:21,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:37:21,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136993898] [2021-11-25 20:37:21,968 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:37:21,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197022105] [2021-11-25 20:37:21,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197022105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:21,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:21,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:37:21,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82548715] [2021-11-25 20:37:21,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:21,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:37:21,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:21,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:37:21,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:37:21,972 INFO L87 Difference]: Start difference. First operand 362 states and 437 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:37:24,728 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:37:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:26,195 INFO L93 Difference]: Finished difference Result 674 states and 815 transitions. [2021-11-25 20:37:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:37:26,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 62 [2021-11-25 20:37:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:26,199 INFO L225 Difference]: With dead ends: 674 [2021-11-25 20:37:26,200 INFO L226 Difference]: Without dead ends: 362 [2021-11-25 20:37:26,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:37:26,202 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 12 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:26,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 770 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 20:37:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-25 20:37:26,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2021-11-25 20:37:26,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 339 states have (on average 1.176991150442478) internal successors, (399), 344 states have internal predecessors, (399), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-25 20:37:26,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 436 transitions. [2021-11-25 20:37:26,223 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 436 transitions. Word has length 62 [2021-11-25 20:37:26,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:26,223 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 436 transitions. [2021-11-25 20:37:26,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:37:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 436 transitions. [2021-11-25 20:37:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 20:37:26,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:26,228 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:26,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:26,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:26,447 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash 703033876, now seen corresponding path program 1 times [2021-11-25 20:37:26,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:26,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312388096] [2021-11-25 20:37:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:26,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:26,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:37:26,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98355630] [2021-11-25 20:37:26,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:26,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:26,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:26,625 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:26,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:37:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 2283 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:37:27,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:37:27,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:37:27,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:27,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312388096] [2021-11-25 20:37:27,995 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:37:27,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98355630] [2021-11-25 20:37:27,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98355630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:27,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:27,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:37:27,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494427238] [2021-11-25 20:37:27,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:27,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:27,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:27,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:27,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:27,997 INFO L87 Difference]: Start difference. First operand 362 states and 436 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:37:31,141 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:37:31,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:31,243 INFO L93 Difference]: Finished difference Result 820 states and 988 transitions. [2021-11-25 20:37:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:31,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 83 [2021-11-25 20:37:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:31,248 INFO L225 Difference]: With dead ends: 820 [2021-11-25 20:37:31,249 INFO L226 Difference]: Without dead ends: 484 [2021-11-25 20:37:31,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:31,251 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 110 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:31,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 530 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 20:37:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-25 20:37:31,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 429. [2021-11-25 20:37:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 403 states have (on average 1.1687344913151365) internal successors, (471), 408 states have internal predecessors, (471), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-25 20:37:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 514 transitions. [2021-11-25 20:37:31,279 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 514 transitions. Word has length 83 [2021-11-25 20:37:31,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:31,279 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 514 transitions. [2021-11-25 20:37:31,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 20:37:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 514 transitions. [2021-11-25 20:37:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 20:37:31,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:31,283 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:31,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:31,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:31,511 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1391454083, now seen corresponding path program 1 times [2021-11-25 20:37:31,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:31,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032516512] [2021-11-25 20:37:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:31,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:31,668 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:37:31,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969401549] [2021-11-25 20:37:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:31,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:31,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:31,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:31,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:37:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1420 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:37:32,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:37:32,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:37:32,888 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:32,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032516512] [2021-11-25 20:37:32,888 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:37:32,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969401549] [2021-11-25 20:37:32,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969401549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:32,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:32,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:37:32,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921579723] [2021-11-25 20:37:32,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:32,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:37:32,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:32,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:37:32,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:37:32,891 INFO L87 Difference]: Start difference. First operand 429 states and 514 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:37:35,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 20:37:35,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:35,202 INFO L93 Difference]: Finished difference Result 719 states and 867 transitions. [2021-11-25 20:37:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:37:35,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 96 [2021-11-25 20:37:35,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:35,206 INFO L225 Difference]: With dead ends: 719 [2021-11-25 20:37:35,207 INFO L226 Difference]: Without dead ends: 351 [2021-11-25 20:37:35,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:37:35,209 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 438 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:35,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 334 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-25 20:37:35,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-25 20:37:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2021-11-25 20:37:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 330 states have (on average 1.1666666666666667) internal successors, (385), 335 states have internal predecessors, (385), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-25 20:37:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 418 transitions. [2021-11-25 20:37:35,232 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 418 transitions. Word has length 96 [2021-11-25 20:37:35,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:35,233 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 418 transitions. [2021-11-25 20:37:35,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 20:37:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 418 transitions. [2021-11-25 20:37:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-25 20:37:35,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:35,235 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:35,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:35,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:35,459 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:35,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:35,460 INFO L85 PathProgramCache]: Analyzing trace with hash 412477519, now seen corresponding path program 1 times [2021-11-25 20:37:35,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:35,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269150630] [2021-11-25 20:37:35,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:35,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:35,565 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:37:35,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340452761] [2021-11-25 20:37:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:35,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:35,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:35,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:35,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_626bf899-66d3-4c7f-a444-435f8c7b2634/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process