./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c --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_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/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_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/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_e8a69e5a-06e6-4efe-9926-046757456ddf/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 3a1b0d13ed57f2c287b7c5c279f90464e92ac535bf47194a470e4f6c38d6c07a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:19:41,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:19:41,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:19:41,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:19:41,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:19:41,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:19:41,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:19:41,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:19:41,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:19:41,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:19:41,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:19:41,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:19:41,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:19:41,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:19:41,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:19:41,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:19:41,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:19:41,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:19:41,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:19:41,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:19:41,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:19:41,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:19:41,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:19:41,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:19:41,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:19:41,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:19:41,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:19:41,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:19:41,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:19:41,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:19:41,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:19:41,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:19:41,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:19:41,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:19:41,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:19:41,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:19:41,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:19:41,291 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:19:41,291 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:19:41,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:19:41,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:19:41,298 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:19:41,350 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:19:41,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:19:41,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:19:41,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:19:41,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:19:41,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:19:41,353 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:19:41,353 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:19:41,354 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:19:41,354 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:19:41,355 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:19:41,355 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:19:41,355 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:19:41,356 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:19:41,362 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:19:41,362 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:19:41,362 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:19:41,363 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:19:41,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:19:41,364 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:19:41,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:19:41,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:19:41,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:19:41,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:19:41,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:19:41,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:19:41,366 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:19:41,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:19:41,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:19:41,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:19:41,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:19:41,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:19:41,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:19:41,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:19:41,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:19:41,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:19:41,369 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:19:41,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:19:41,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:19:41,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:19:41,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:19:41,370 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_e8a69e5a-06e6-4efe-9926-046757456ddf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a1b0d13ed57f2c287b7c5c279f90464e92ac535bf47194a470e4f6c38d6c07a [2021-11-25 18:19:41,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:19:41,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:19:41,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:19:41,694 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:19:41,695 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:19:41,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c [2021-11-25 18:19:41,778 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/data/45b6aac36/c36ae9a9ee8a4732b355a3b2a6df66d6/FLAG4bc3f5444 [2021-11-25 18:19:42,362 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:19:42,363 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c [2021-11-25 18:19:42,380 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/data/45b6aac36/c36ae9a9ee8a4732b355a3b2a6df66d6/FLAG4bc3f5444 [2021-11-25 18:19:42,678 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/data/45b6aac36/c36ae9a9ee8a4732b355a3b2a6df66d6 [2021-11-25 18:19:42,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:19:42,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:19:42,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:19:42,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:19:42,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:19:42,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:19:42" (1/1) ... [2021-11-25 18:19:42,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aff633c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:42, skipping insertion in model container [2021-11-25 18:19:42,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:19:42" (1/1) ... [2021-11-25 18:19:42,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:19:42,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:19:42,899 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_e8a69e5a-06e6-4efe-9926-046757456ddf/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[1995,2008] [2021-11-25 18:19:42,904 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_e8a69e5a-06e6-4efe-9926-046757456ddf/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[2364,2377] [2021-11-25 18:19:42,949 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:19:42,957 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:19:42,972 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_e8a69e5a-06e6-4efe-9926-046757456ddf/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[1995,2008] [2021-11-25 18:19:42,974 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_e8a69e5a-06e6-4efe-9926-046757456ddf/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[2364,2377] [2021-11-25 18:19:43,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:19:43,015 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:19:43,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43 WrapperNode [2021-11-25 18:19:43,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:19:43,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:19:43,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:19:43,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:19:43,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43" (1/1) ... [2021-11-25 18:19:43,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43" (1/1) ... [2021-11-25 18:19:43,054 INFO L137 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2021-11-25 18:19:43,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:19:43,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:19:43,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:19:43,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:19:43,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43" (1/1) ... [2021-11-25 18:19:43,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43" (1/1) ... [2021-11-25 18:19:43,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43" (1/1) ... [2021-11-25 18:19:43,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43" (1/1) ... [2021-11-25 18:19:43,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43" (1/1) ... [2021-11-25 18:19:43,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43" (1/1) ... [2021-11-25 18:19:43,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43" (1/1) ... [2021-11-25 18:19:43,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:19:43,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:19:43,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:19:43,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:19:43,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43" (1/1) ... [2021-11-25 18:19:43,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:19:43,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:19:43,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:19:43,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:19:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:19:43,166 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-25 18:19:43,167 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-25 18:19:43,167 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-11-25 18:19:43,167 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-11-25 18:19:43,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:19:43,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:19:43,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:19:43,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:19:43,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:19:43,237 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:19:43,239 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:19:43,451 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:19:43,550 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:19:43,562 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:19:43,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:19:43 BoogieIcfgContainer [2021-11-25 18:19:43,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:19:43,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:19:43,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:19:43,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:19:43,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:19:42" (1/3) ... [2021-11-25 18:19:43,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2d75a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:19:43, skipping insertion in model container [2021-11-25 18:19:43,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:43" (2/3) ... [2021-11-25 18:19:43,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d2d75a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:19:43, skipping insertion in model container [2021-11-25 18:19:43,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:19:43" (3/3) ... [2021-11-25 18:19:43,575 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-3a.c.cil.c [2021-11-25 18:19:43,582 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:19:43,582 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 18:19:43,635 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:19:43,641 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 18:19:43,641 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 18:19:43,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 38 states have internal predecessors, (53), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:19:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 18:19:43,663 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:19:43,664 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 18:19:43,664 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:19:43,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:19:43,670 INFO L85 PathProgramCache]: Analyzing trace with hash 6715082, now seen corresponding path program 1 times [2021-11-25 18:19:43,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:19:43,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136214158] [2021-11-25 18:19:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:43,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:19:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:19:43,772 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:19:43,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:19:43,802 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 18:19:43,804 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:19:43,805 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-25 18:19:43,807 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-25 18:19:43,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:19:43,812 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-25 18:19:43,814 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:19:43,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:19:43 BoogieIcfgContainer [2021-11-25 18:19:43,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:19:43,833 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:19:43,833 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:19:43,833 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:19:43,834 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:19:43" (3/4) ... [2021-11-25 18:19:43,837 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 18:19:43,837 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:19:43,838 INFO L158 Benchmark]: Toolchain (without parser) took 1152.73ms. Allocated memory was 94.4MB in the beginning and 119.5MB in the end (delta: 25.2MB). Free memory was 58.6MB in the beginning and 58.0MB in the end (delta: 550.2kB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. [2021-11-25 18:19:43,839 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 94.4MB. Free memory was 66.8MB in the beginning and 66.8MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:19:43,840 INFO L158 Benchmark]: CACSL2BoogieTranslator took 328.58ms. Allocated memory was 94.4MB in the beginning and 119.5MB in the end (delta: 25.2MB). Free memory was 58.3MB in the beginning and 90.9MB in the end (delta: -32.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 18:19:43,841 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.89ms. Allocated memory is still 119.5MB. Free memory was 90.9MB in the beginning and 89.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:19:43,841 INFO L158 Benchmark]: Boogie Preprocessor took 29.45ms. Allocated memory is still 119.5MB. Free memory was 89.5MB in the beginning and 88.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:19:43,842 INFO L158 Benchmark]: RCFGBuilder took 480.45ms. Allocated memory is still 119.5MB. Free memory was 88.1MB in the beginning and 72.7MB in the end (delta: 15.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-25 18:19:43,843 INFO L158 Benchmark]: TraceAbstraction took 264.27ms. Allocated memory is still 119.5MB. Free memory was 72.0MB in the beginning and 58.7MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 18:19:43,843 INFO L158 Benchmark]: Witness Printer took 4.10ms. Allocated memory is still 119.5MB. Free memory was 58.7MB in the beginning and 58.0MB in the end (delta: 698.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:19:43,847 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 94.4MB. Free memory was 66.8MB in the beginning and 66.8MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 328.58ms. Allocated memory was 94.4MB in the beginning and 119.5MB in the end (delta: 25.2MB). Free memory was 58.3MB in the beginning and 90.9MB in the end (delta: -32.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.89ms. Allocated memory is still 119.5MB. Free memory was 90.9MB in the beginning and 89.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.45ms. Allocated memory is still 119.5MB. Free memory was 89.5MB in the beginning and 88.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 480.45ms. Allocated memory is still 119.5MB. Free memory was 88.1MB in the beginning and 72.7MB in the end (delta: 15.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 264.27ms. Allocated memory is still 119.5MB. Free memory was 72.0MB in the beginning and 58.7MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 4.10ms. Allocated memory is still 119.5MB. Free memory was 58.7MB in the beginning and 58.0MB in the end (delta: 698.0kB). Peak memory consumption was 2.1MB. 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 - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L309] COND TRUE __VERIFIER_nondet_int() [L310] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=49, x=49] [L47] COND TRUE !(result >= 0.0f && result < 1.5f) VAL [IN=49, x=49] [L48] reach_error() VAL [IN=49, x=49] - UnprovableResult [Line: 60]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-25 18:19:43,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/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_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/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 3a1b0d13ed57f2c287b7c5c279f90464e92ac535bf47194a470e4f6c38d6c07a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:19:46,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:19:46,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:19:46,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:19:46,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:19:46,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:19:46,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:19:46,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:19:46,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:19:46,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:19:46,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:19:46,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:19:46,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:19:46,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:19:46,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:19:46,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:19:46,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:19:46,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:19:46,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:19:46,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:19:46,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:19:46,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:19:46,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:19:46,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:19:46,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:19:46,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:19:46,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:19:46,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:19:46,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:19:46,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:19:46,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:19:46,393 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:19:46,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:19:46,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:19:46,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:19:46,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:19:46,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:19:46,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:19:46,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:19:46,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:19:46,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:19:46,415 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 18:19:46,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:19:46,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:19:46,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:19:46,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:19:46,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:19:46,458 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:19:46,458 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:19:46,459 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:19:46,459 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:19:46,459 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:19:46,460 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:19:46,461 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:19:46,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:19:46,462 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:19:46,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:19:46,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:19:46,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:19:46,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:19:46,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:19:46,464 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:19:46,464 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:19:46,465 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:19:46,465 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:19:46,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:19:46,465 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:19:46,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:19:46,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:19:46,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:19:46,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:19:46,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:19:46,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:19:46,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:19:46,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:19:46,469 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:19:46,469 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:19:46,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:19:46,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:19:46,470 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:19:46,470 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_e8a69e5a-06e6-4efe-9926-046757456ddf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a1b0d13ed57f2c287b7c5c279f90464e92ac535bf47194a470e4f6c38d6c07a [2021-11-25 18:19:46,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:19:46,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:19:46,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:19:46,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:19:46,883 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:19:46,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c [2021-11-25 18:19:46,954 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/data/0d345643b/7ff4e2918a3043a192adc087e9c0809d/FLAGbd06eed05 [2021-11-25 18:19:47,522 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:19:47,523 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c [2021-11-25 18:19:47,539 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/data/0d345643b/7ff4e2918a3043a192adc087e9c0809d/FLAGbd06eed05 [2021-11-25 18:19:47,858 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/data/0d345643b/7ff4e2918a3043a192adc087e9c0809d [2021-11-25 18:19:47,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:19:47,862 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:19:47,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:19:47,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:19:47,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:19:47,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:19:47" (1/1) ... [2021-11-25 18:19:47,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798622e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:47, skipping insertion in model container [2021-11-25 18:19:47,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:19:47" (1/1) ... [2021-11-25 18:19:47,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:19:47,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:19:48,093 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_e8a69e5a-06e6-4efe-9926-046757456ddf/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[1995,2008] [2021-11-25 18:19:48,106 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_e8a69e5a-06e6-4efe-9926-046757456ddf/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[2364,2377] [2021-11-25 18:19:48,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:19:48,210 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:19:48,235 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_e8a69e5a-06e6-4efe-9926-046757456ddf/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[1995,2008] [2021-11-25 18:19:48,238 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_e8a69e5a-06e6-4efe-9926-046757456ddf/sv-benchmarks/c/combinations/square_8+soft_float_4-3a.c.cil.c[2364,2377] [2021-11-25 18:19:48,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:19:48,305 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:19:48,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48 WrapperNode [2021-11-25 18:19:48,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:19:48,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:19:48,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:19:48,308 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:19:48,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48" (1/1) ... [2021-11-25 18:19:48,347 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48" (1/1) ... [2021-11-25 18:19:48,377 INFO L137 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 70 [2021-11-25 18:19:48,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:19:48,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:19:48,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:19:48,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:19:48,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48" (1/1) ... [2021-11-25 18:19:48,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48" (1/1) ... [2021-11-25 18:19:48,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48" (1/1) ... [2021-11-25 18:19:48,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48" (1/1) ... [2021-11-25 18:19:48,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48" (1/1) ... [2021-11-25 18:19:48,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48" (1/1) ... [2021-11-25 18:19:48,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48" (1/1) ... [2021-11-25 18:19:48,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:19:48,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:19:48,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:19:48,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:19:48,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48" (1/1) ... [2021-11-25 18:19:48,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:19:48,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:19:48,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:19:48,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:19:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:19:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:19:48,546 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-11-25 18:19:48,547 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-11-25 18:19:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2021-11-25 18:19:48,547 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2021-11-25 18:19:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:19:48,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:19:48,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:19:48,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:19:48,654 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:19:48,656 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:19:51,117 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:19:51,125 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:19:51,125 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 18:19:51,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:19:51 BoogieIcfgContainer [2021-11-25 18:19:51,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:19:51,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:19:51,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:19:51,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:19:51,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:19:47" (1/3) ... [2021-11-25 18:19:51,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3788efdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:19:51, skipping insertion in model container [2021-11-25 18:19:51,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:48" (2/3) ... [2021-11-25 18:19:51,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3788efdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:19:51, skipping insertion in model container [2021-11-25 18:19:51,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:19:51" (3/3) ... [2021-11-25 18:19:51,136 INFO L111 eAbstractionObserver]: Analyzing ICFG square_8+soft_float_4-3a.c.cil.c [2021-11-25 18:19:51,142 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:19:51,142 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-25 18:19:51,192 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:19:51,199 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 18:19:51,200 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-25 18:19:51,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 50 states have internal predecessors, (71), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:19:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:19:51,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:19:51,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:19:51,222 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:19:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:19:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash -548115930, now seen corresponding path program 1 times [2021-11-25 18:19:51,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:19:51,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722368447] [2021-11-25 18:19:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:51,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:19:51,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:19:51,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:19:51,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:19:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:19:51,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-25 18:19:51,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:19:51,774 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 18:19:51,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:19:51,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:19:51,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722368447] [2021-11-25 18:19:51,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722368447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:19:51,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:19:51,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:19:51,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754779377] [2021-11-25 18:19:51,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:19:51,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:19:51,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:19:51,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:19:51,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:19:51,812 INFO L87 Difference]: Start difference. First operand has 63 states, 48 states have (on average 1.4791666666666667) internal successors, (71), 50 states have internal predecessors, (71), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-25 18:19:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:19:51,843 INFO L93 Difference]: Finished difference Result 121 states and 179 transitions. [2021-11-25 18:19:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:19:51,847 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:19:51,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:19:51,856 INFO L225 Difference]: With dead ends: 121 [2021-11-25 18:19:51,856 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 18:19:51,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 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 18:19:51,864 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:19:51,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:19:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 18:19:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-11-25 18:19:51,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 44 states have internal predecessors, (57), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 18:19:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2021-11-25 18:19:51,918 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 7 [2021-11-25 18:19:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:19:51,918 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2021-11-25 18:19:51,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2021-11-25 18:19:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2021-11-25 18:19:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:19:51,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:19:51,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:19:51,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:19:52,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:19:52,127 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:19:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:19:52,128 INFO L85 PathProgramCache]: Analyzing trace with hash -548056348, now seen corresponding path program 1 times [2021-11-25 18:19:52,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:19:52,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430048469] [2021-11-25 18:19:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:19:52,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:19:52,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:19:52,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:19:52,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:20:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:20:07,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:20:07,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:20:22,192 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (and (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse0) (= |c_ULTIMATE.start_main1_~result~0#1| (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-11-25 18:21:11,986 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from false [2021-11-25 18:21:14,028 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main1_~IN~0#1| (_ FloatingPoint 8 24))) (let ((.cse1 ((_ to_fp 8 24) roundNearestTiesToEven 1.0))) (and (let ((.cse0 (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven .cse1 (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 2.0)) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 8.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 1.0 16.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)) (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 8 24) roundNearestTiesToEven (/ 5.0 128.0)) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|) |ULTIMATE.start_main1_~IN~0#1|)))) (or (not (fp.lt .cse0 ((_ to_fp 8 24) roundNearestTiesToEven (/ 3.0 2.0)))) (not (fp.geq .cse0 (_ +zero 8 24))))) (fp.geq |ULTIMATE.start_main1_~IN~0#1| (_ +zero 8 24)) (fp.lt |ULTIMATE.start_main1_~IN~0#1| .cse1)))) is different from true [2021-11-25 18:21:14,028 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 18:21:14,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:21:14,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:21:14,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430048469] [2021-11-25 18:21:14,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430048469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:21:14,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:21:14,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:21:14,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553820047] [2021-11-25 18:21:14,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:21:14,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:21:14,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:21:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:21:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=12, Unknown=3, NotChecked=14, Total=42 [2021-11-25 18:21:14,033 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2021-11-25 18:21:16,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 18:21:16,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:16,654 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-11-25 18:21:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:21:16,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:21:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:16,657 INFO L225 Difference]: With dead ends: 56 [2021-11-25 18:21:16,657 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 18:21:16,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=18, Invalid=17, Unknown=3, NotChecked=18, Total=56 [2021-11-25 18:21:16,659 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 69 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:16,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 171 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 1 Unknown, 143 Unchecked, 2.5s Time] [2021-11-25 18:21:16,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 18:21:16,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-25 18:21:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 38 states have (on average 1.368421052631579) internal successors, (52), 39 states have internal predecessors, (52), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 18:21:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2021-11-25 18:21:16,670 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 7 [2021-11-25 18:21:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:16,670 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2021-11-25 18:21:16,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2021-11-25 18:21:16,671 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2021-11-25 18:21:16,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 18:21:16,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:16,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:21:16,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:16,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:21:16,886 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:16,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:16,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1012278713, now seen corresponding path program 1 times [2021-11-25 18:21:16,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:21:16,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685202916] [2021-11-25 18:21:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:16,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:21:16,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:21:16,890 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:21:16,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:21:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:16,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:21:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:21:17,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:21:17,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:21:17,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685202916] [2021-11-25 18:21:17,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685202916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:21:17,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:21:17,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:21:17,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724309161] [2021-11-25 18:21:17,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:21:17,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:21:17,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:21:17,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:21:17,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:21:17,343 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:21:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:17,660 INFO L93 Difference]: Finished difference Result 100 states and 137 transitions. [2021-11-25 18:21:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:21:17,661 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-25 18:21:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:17,664 INFO L225 Difference]: With dead ends: 100 [2021-11-25 18:21:17,664 INFO L226 Difference]: Without dead ends: 72 [2021-11-25 18:21:17,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-25 18:21:17,666 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 20 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:17,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 445 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:21:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-25 18:21:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2021-11-25 18:21:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 48 states have internal predecessors, (60), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-25 18:21:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2021-11-25 18:21:17,681 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 32 [2021-11-25 18:21:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:17,682 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2021-11-25 18:21:17,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:21:17,683 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2021-11-25 18:21:17,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 18:21:17,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:17,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-25 18:21:17,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-25 18:21:17,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:21:17,897 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:17,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:17,897 INFO L85 PathProgramCache]: Analyzing trace with hash -666477956, now seen corresponding path program 1 times [2021-11-25 18:21:17,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:21:17,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279264562] [2021-11-25 18:21:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:17,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:21:17,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:21:17,901 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:21:17,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:21:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:17,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:21:17,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:21:18,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:21:18,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:21:18,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279264562] [2021-11-25 18:21:18,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279264562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:18,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1684208737] [2021-11-25 18:21:18,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:18,683 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:21:18,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:21:18,691 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:21:18,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-25 18:21:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:21:18,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:21:18,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:21:19,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1684208737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:19,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277705893] [2021-11-25 18:21:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:19,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:19,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:21:19,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:21:19,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:21:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:19,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:21:19,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:21:19,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:21:19,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277705893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:19,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:21:19,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 9 [2021-11-25 18:21:19,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025182679] [2021-11-25 18:21:19,658 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:21:19,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:21:19,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:21:19,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:21:19,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:21:19,660 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:21:20,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:20,122 INFO L93 Difference]: Finished difference Result 122 states and 162 transitions. [2021-11-25 18:21:20,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:21:20,128 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-11-25 18:21:20,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:20,130 INFO L225 Difference]: With dead ends: 122 [2021-11-25 18:21:20,130 INFO L226 Difference]: Without dead ends: 94 [2021-11-25 18:21:20,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:21:20,132 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 26 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:20,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 516 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:21:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-25 18:21:20,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2021-11-25 18:21:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 55 states have internal predecessors, (68), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (15), 11 states have call predecessors, (15), 11 states have call successors, (15) [2021-11-25 18:21:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2021-11-25 18:21:20,163 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 36 [2021-11-25 18:21:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:20,163 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2021-11-25 18:21:20,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:21:20,164 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2021-11-25 18:21:20,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 18:21:20,167 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:20,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-11-25 18:21:20,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:20,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:20,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-25 18:21:20,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:20,769 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash 506323174, now seen corresponding path program 1 times [2021-11-25 18:21:20,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:21:20,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185377103] [2021-11-25 18:21:20,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:20,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:21:20,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:21:20,772 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:21:20,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 18:21:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:20,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:21:20,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:21:21,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:21:21,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:21:21,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185377103] [2021-11-25 18:21:21,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185377103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:21,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [375073049] [2021-11-25 18:21:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:21,482 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:21:21,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:21:21,488 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:21:21,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 18:21:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:21,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:21:21,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 18:21:21,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:21:21,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [375073049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:21:21,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:21:21,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 12 [2021-11-25 18:21:21,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144861213] [2021-11-25 18:21:21,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:21:21,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:21:21,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:21:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:21:21,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:21:21,993 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:21:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:22,491 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2021-11-25 18:21:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:21:22,493 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2021-11-25 18:21:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:22,495 INFO L225 Difference]: With dead ends: 115 [2021-11-25 18:21:22,496 INFO L226 Difference]: Without dead ends: 92 [2021-11-25 18:21:22,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:21:22,498 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 19 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:22,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 539 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:21:22,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-25 18:21:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-11-25 18:21:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 59 states have (on average 1.271186440677966) internal successors, (75), 61 states have internal predecessors, (75), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-25 18:21:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 104 transitions. [2021-11-25 18:21:22,512 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 104 transitions. Word has length 40 [2021-11-25 18:21:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:22,513 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 104 transitions. [2021-11-25 18:21:22,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 18:21:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 104 transitions. [2021-11-25 18:21:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 18:21:22,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:22,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:21:22,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:22,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:22,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:21:22,933 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:22,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:22,934 INFO L85 PathProgramCache]: Analyzing trace with hash -437635673, now seen corresponding path program 2 times [2021-11-25 18:21:22,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:21:22,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619062921] [2021-11-25 18:21:22,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:21:22,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:21:22,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:21:22,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:21:22,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 18:21:22,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-25 18:21:22,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:21:22,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 18:21:22,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 18:21:23,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:21:23,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:21:23,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619062921] [2021-11-25 18:21:23,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619062921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:21:23,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:21:23,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:21:23,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910573650] [2021-11-25 18:21:23,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:21:23,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:21:23,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:21:23,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:21:23,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:21:23,384 INFO L87 Difference]: Start difference. First operand 80 states and 104 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:21:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:23,616 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-11-25 18:21:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:21:23,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-11-25 18:21:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:23,623 INFO L225 Difference]: With dead ends: 99 [2021-11-25 18:21:23,623 INFO L226 Difference]: Without dead ends: 97 [2021-11-25 18:21:23,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:21:23,625 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 9 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:23,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 338 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2021-11-25 18:21:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-25 18:21:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2021-11-25 18:21:23,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 66 states have internal predecessors, (80), 14 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (17), 12 states have call predecessors, (17), 13 states have call successors, (17) [2021-11-25 18:21:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 111 transitions. [2021-11-25 18:21:23,646 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 111 transitions. Word has length 40 [2021-11-25 18:21:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:23,646 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 111 transitions. [2021-11-25 18:21:23,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:21:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 111 transitions. [2021-11-25 18:21:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 18:21:23,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:23,649 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:21:23,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:23,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:21:23,861 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:23,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:23,862 INFO L85 PathProgramCache]: Analyzing trace with hash -380377371, now seen corresponding path program 1 times [2021-11-25 18:21:23,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:21:23,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986943437] [2021-11-25 18:21:23,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:23,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:21:23,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:21:23,863 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:21:23,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 18:21:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:23,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:21:23,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 18:21:24,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:21:24,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:21:24,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986943437] [2021-11-25 18:21:24,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986943437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:21:24,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:21:24,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:21:24,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431408471] [2021-11-25 18:21:24,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:21:24,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:21:24,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:21:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:21:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:21:24,315 INFO L87 Difference]: Start difference. First operand 86 states and 111 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:21:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:24,501 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2021-11-25 18:21:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:21:24,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-11-25 18:21:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:24,503 INFO L225 Difference]: With dead ends: 95 [2021-11-25 18:21:24,504 INFO L226 Difference]: Without dead ends: 93 [2021-11-25 18:21:24,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:21:24,505 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 9 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:24,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-11-25 18:21:24,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-25 18:21:24,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2021-11-25 18:21:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 64 states have internal predecessors, (78), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-25 18:21:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2021-11-25 18:21:24,527 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 40 [2021-11-25 18:21:24,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:24,527 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2021-11-25 18:21:24,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:21:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2021-11-25 18:21:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 18:21:24,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:24,530 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:21:24,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:24,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:21:24,742 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:24,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:24,742 INFO L85 PathProgramCache]: Analyzing trace with hash -830434842, now seen corresponding path program 1 times [2021-11-25 18:21:24,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:21:24,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195763713] [2021-11-25 18:21:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:24,743 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:21:24,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:21:24,743 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:21:24,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 18:21:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:21:24,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:21:25,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:21:25,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:21:25,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195763713] [2021-11-25 18:21:25,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195763713] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:25,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [822751175] [2021-11-25 18:21:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:25,642 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:21:25,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:21:25,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:21:25,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-25 18:21:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:25,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:21:25,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:25,914 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:21:25,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:21:26,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [822751175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:26,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155681992] [2021-11-25 18:21:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:26,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:21:26,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:21:26,289 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:21:26,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:21:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:26,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:21:26,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:21:26,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:21:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:21:26,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155681992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:21:26,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:21:26,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 9 [2021-11-25 18:21:26,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018873304] [2021-11-25 18:21:26,894 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:21:26,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:21:26,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:21:26,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:21:26,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:21:26,896 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:21:27,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:27,532 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2021-11-25 18:21:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:21:27,533 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-11-25 18:21:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:27,535 INFO L225 Difference]: With dead ends: 130 [2021-11-25 18:21:27,535 INFO L226 Difference]: Without dead ends: 119 [2021-11-25 18:21:27,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:21:27,536 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 43 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:27,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 516 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 18:21:27,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-25 18:21:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 98. [2021-11-25 18:21:27,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 75 states have internal predecessors, (88), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 15 states have call predecessors, (22), 15 states have call successors, (22) [2021-11-25 18:21:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2021-11-25 18:21:27,557 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 45 [2021-11-25 18:21:27,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:27,557 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2021-11-25 18:21:27,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:21:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2021-11-25 18:21:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 18:21:27,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:27,559 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:21:27,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:27,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:27,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:28,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:21:28,162 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:28,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash -129370264, now seen corresponding path program 1 times [2021-11-25 18:21:28,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:21:28,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160554443] [2021-11-25 18:21:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:28,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:21:28,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:21:28,163 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:21:28,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 18:21:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:21:28,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 18:21:28,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:21:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:21:28,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:21:28,735 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:21:28,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160554443] [2021-11-25 18:21:28,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160554443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:21:28,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:21:28,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 18:21:28,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671121320] [2021-11-25 18:21:28,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:21:28,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 18:21:28,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:21:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 18:21:28,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-25 18:21:28,738 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:21:29,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:21:29,693 INFO L93 Difference]: Finished difference Result 134 states and 173 transitions. [2021-11-25 18:21:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:21:29,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2021-11-25 18:21:29,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:21:29,695 INFO L225 Difference]: With dead ends: 134 [2021-11-25 18:21:29,695 INFO L226 Difference]: Without dead ends: 127 [2021-11-25 18:21:29,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:21:29,697 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 33 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:21:29,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 623 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 18:21:29,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-25 18:21:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-11-25 18:21:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 76 states have internal predecessors, (90), 16 states have call successors, (16), 7 states have call predecessors, (16), 10 states have return successors, (22), 16 states have call predecessors, (22), 15 states have call successors, (22) [2021-11-25 18:21:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2021-11-25 18:21:29,714 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 45 [2021-11-25 18:21:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:21:29,714 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2021-11-25 18:21:29,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 18:21:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2021-11-25 18:21:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 18:21:29,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:21:29,716 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:21:29,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:29,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:21:29,928 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:21:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:21:29,929 INFO L85 PathProgramCache]: Analyzing trace with hash -981125120, now seen corresponding path program 1 times [2021-11-25 18:21:29,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:21:29,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752479438] [2021-11-25 18:21:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:21:29,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:21:29,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:21:29,931 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:21:29,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 18:21:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:21:29,998 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 18:21:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 18:21:30,062 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-25 18:21:30,063 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 18:21:30,064 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-25 18:21:30,065 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-25 18:21:30,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:21:30,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:21:30,269 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:21:30,271 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 18:21:30,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:21:30 BoogieIcfgContainer [2021-11-25 18:21:30,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 18:21:30,316 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 18:21:30,316 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 18:21:30,316 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 18:21:30,317 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:19:51" (3/4) ... [2021-11-25 18:21:30,318 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-25 18:21:30,385 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 18:21:30,386 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 18:21:30,386 INFO L158 Benchmark]: Toolchain (without parser) took 102524.58ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 36.4MB in the beginning and 30.8MB in the end (delta: 5.6MB). Peak memory consumption was 19.5MB. Max. memory is 16.1GB. [2021-11-25 18:21:30,387 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 58.7MB. Free memory is still 39.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:21:30,387 INFO L158 Benchmark]: CACSL2BoogieTranslator took 443.25ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 36.3MB in the beginning and 50.7MB in the end (delta: -14.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 18:21:30,388 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.00ms. Allocated memory is still 71.3MB. Free memory was 50.5MB in the beginning and 48.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:21:30,388 INFO L158 Benchmark]: Boogie Preprocessor took 73.04ms. Allocated memory is still 71.3MB. Free memory was 48.7MB in the beginning and 47.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 18:21:30,388 INFO L158 Benchmark]: RCFGBuilder took 2674.88ms. Allocated memory is still 71.3MB. Free memory was 47.2MB in the beginning and 51.1MB in the end (delta: -4.0MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2021-11-25 18:21:30,389 INFO L158 Benchmark]: TraceAbstraction took 99185.74ms. Allocated memory is still 71.3MB. Free memory was 50.5MB in the beginning and 34.4MB in the end (delta: 16.1MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. [2021-11-25 18:21:30,389 INFO L158 Benchmark]: Witness Printer took 69.99ms. Allocated memory is still 71.3MB. Free memory was 34.4MB in the beginning and 30.8MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 18:21:30,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 58.7MB. Free memory is still 39.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 443.25ms. Allocated memory was 58.7MB in the beginning and 71.3MB in the end (delta: 12.6MB). Free memory was 36.3MB in the beginning and 50.7MB in the end (delta: -14.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.00ms. Allocated memory is still 71.3MB. Free memory was 50.5MB in the beginning and 48.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 73.04ms. Allocated memory is still 71.3MB. Free memory was 48.7MB in the beginning and 47.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 2674.88ms. Allocated memory is still 71.3MB. Free memory was 47.2MB in the beginning and 51.1MB in the end (delta: -4.0MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. * TraceAbstraction took 99185.74ms. Allocated memory is still 71.3MB. Free memory was 50.5MB in the beginning and 34.4MB in the end (delta: 16.1MB). Peak memory consumption was 16.5MB. Max. memory is 16.1GB. * Witness Printer took 69.99ms. Allocated memory is still 71.3MB. Free memory was 34.4MB in the beginning and 30.8MB in the end (delta: 3.6MB). 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 - CounterExampleResult [Line: 60]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L309] COND FALSE !(__VERIFIER_nondet_int()) [L312] CALL main2() [L269] unsigned int a ; [L270] unsigned int ma = __VERIFIER_nondet_uint(); [L271] signed char ea = __VERIFIER_nondet_char(); [L272] unsigned int b ; [L273] unsigned int mb = __VERIFIER_nondet_uint(); [L274] signed char eb = __VERIFIER_nondet_char(); [L275] unsigned int r_add1 ; [L276] unsigned int r_add2 ; [L277] unsigned int zero ; [L278] int tmp ; [L279] int tmp___0 ; [L280] int __retres14 ; [L284] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L72] COND TRUE ! m [L73] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L123] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L284] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0] [L284] zero = base2flt(0, 0) [L285] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=0, \old(m)=16777216] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L72] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L78] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L100] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L102] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L119] m = m & ~ (1U << 24U) [L120] res = m | ((unsigned int )(e + 128) << 24U) [L121] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=2147483648, e=0, m=0, res=2147483648] [L123] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=-2147483648, __retres4=2147483648, e=0, m=0, res=2147483648] [L285] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=-2147483648, ea=0, ma=16777216, zero=0] [L285] a = base2flt(ma, ea) [L286] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=64, \old(m)=16777216] [L68] unsigned int res ; [L69] unsigned int __retres4 ; VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L72] COND FALSE !(! m) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L78] COND FALSE !(m < 1U << 24U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L100] COND TRUE 1 VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L102] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=64, \old(m)=16777216, e=64, m=16777216] [L119] m = m & ~ (1U << 24U) [L120] res = m | ((unsigned int )(e + 128) << 24U) [L121] __retres4 = res VAL [\old(e)=64, \old(m)=16777216, __retres4=3221225472, e=64, m=0, res=3221225472] [L123] return (__retres4); VAL [\old(e)=64, \old(m)=16777216, \result=-1073741824, __retres4=3221225472, e=64, m=0, res=3221225472] [L286] RET, EXPR base2flt(mb, eb) VAL [a=2147483648, base2flt(mb, eb)=-1073741824, ea=0, eb=64, ma=16777216, mb=16777216, zero=0] [L286] b = base2flt(mb, eb) [L287] CALL addflt(a, b) VAL [\old(a)=2147483648, \old(b)=3221225472] [L127] unsigned int res ; [L128] unsigned int ma ; [L129] unsigned int mb ; [L130] unsigned int delta ; [L131] int ea ; [L132] int eb ; [L133] unsigned int tmp ; [L134] unsigned int __retres10 ; VAL [\old(a)=2147483648, \old(b)=3221225472, a=2147483648, b=3221225472] [L137] COND TRUE a < b [L138] tmp = a [L139] a = b [L140] b = tmp VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, tmp=2147483648] [L144] COND FALSE !(! b) [L151] ma = a & ((1U << 24U) - 1U) [L152] ea = (int )(a >> 24U) - 128 [L153] ma = ma | (1U << 24U) [L154] mb = b & ((1U << 24U) - 1U) [L155] eb = (int )(b >> 24U) - 128 [L156] mb = mb | (1U << 24U) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L157] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=1] [L59] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L157] RET __VERIFIER_assert(ea >= eb) VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L158] delta = ea - eb VAL [\old(a)=2147483648, \old(b)=3221225472, a=3221225472, b=2147483648, delta=64, ea=64, eb=0, ma=16777216, mb=16777216, tmp=2147483648] [L159] CALL __VERIFIER_assert(delta < sizeof(mb) * 8) VAL [\old(cond)=0] [L59] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L60] reach_error() VAL [\old(cond)=0, cond=0] - UnprovableResult [Line: 48]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 63 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 99.1s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 245 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 228 mSDsluCounter, 3546 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 162 IncrementalHoareTripleChecker+Unchecked, 2915 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 574 IncrementalHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 631 mSDtfsCounter, 574 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 781 GetRequests, 707 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 112 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 15.7s SatisfiabilityAnalysisTime, 73.3s InterpolantComputationTime, 540 NumberOfCodeBlocks, 522 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 756 ConstructedInterpolants, 4 QuantifiedInterpolants, 1477 SizeOfPredicates, 42 NumberOfNonLiveVariables, 998 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 302/344 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: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-25 18:21:30,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8a69e5a-06e6-4efe-9926-046757456ddf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE