./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_Newton-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_Newton-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta --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 7c5bb845798e00aa3572bfadf1cd4653d0b05182832339d0260ef999baa89392 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:41:45,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:41:45,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:41:45,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:41:45,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:41:45,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:41:45,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:41:45,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:41:45,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:41:45,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:41:45,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:41:45,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:41:45,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:41:45,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:41:45,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:41:45,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:41:45,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:41:45,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:41:45,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:41:45,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:41:45,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:41:45,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:41:45,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:41:45,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:41:45,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:41:45,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:41:45,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:41:45,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:41:45,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:41:45,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:41:45,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:41:45,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:41:45,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:41:45,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:41:45,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:41:45,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:41:45,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:41:45,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:41:45,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:41:45,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:41:45,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:41:45,368 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:41:45,393 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:41:45,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:41:45,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:41:45,394 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:41:45,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:41:45,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:41:45,395 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:41:45,395 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:41:45,395 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:41:45,396 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:41:45,396 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:41:45,396 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:41:45,396 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:41:45,396 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:41:45,397 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:41:45,397 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:41:45,397 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:41:45,397 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:41:45,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:41:45,398 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:41:45,398 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:41:45,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:41:45,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:41:45,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:41:45,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:41:45,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:41:45,399 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:41:45,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:41:45,400 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:41:45,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:41:45,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:41:45,400 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:41:45,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:45,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:41:45,401 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:41:45,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:41:45,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:41:45,402 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:41:45,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:41:45,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:41:45,402 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:41:45,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c5bb845798e00aa3572bfadf1cd4653d0b05182832339d0260ef999baa89392 [2022-10-17 17:41:45,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:41:45,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:41:45,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:41:45,714 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:41:45,715 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:41:45,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/float-benchs/inv_Newton-1.c [2022-10-17 17:41:45,772 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/data/3eca10ce8/63f336c665dc4fe28e1a029edc387ea8/FLAG71a4c4b71 [2022-10-17 17:41:46,191 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:41:46,192 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/sv-benchmarks/c/float-benchs/inv_Newton-1.c [2022-10-17 17:41:46,200 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/data/3eca10ce8/63f336c665dc4fe28e1a029edc387ea8/FLAG71a4c4b71 [2022-10-17 17:41:46,555 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/data/3eca10ce8/63f336c665dc4fe28e1a029edc387ea8 [2022-10-17 17:41:46,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:41:46,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:41:46,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:46,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:41:46,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:41:46,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,574 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d120ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46, skipping insertion in model container [2022-10-17 17:41:46,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:41:46,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:41:46,768 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_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/sv-benchmarks/c/float-benchs/inv_Newton-1.c[598,611] [2022-10-17 17:41:46,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:46,820 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:41:46,835 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_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/sv-benchmarks/c/float-benchs/inv_Newton-1.c[598,611] [2022-10-17 17:41:46,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:46,876 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:41:46,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46 WrapperNode [2022-10-17 17:41:46,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:46,877 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:46,877 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:41:46,878 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:41:46,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,892 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,913 INFO L138 Inliner]: procedures = 18, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2022-10-17 17:41:46,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:46,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:41:46,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:41:46,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:41:46,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,938 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:41:46,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:41:46,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:41:46,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:41:46,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (1/1) ... [2022-10-17 17:41:46,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:46,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:47,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:41:47,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:41:47,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:41:47,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:41:47,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:41:47,063 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-10-17 17:41:47,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:41:47,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-10-17 17:41:47,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:41:47,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:41:47,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:41:47,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:41:47,133 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:41:47,135 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:41:47,342 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:41:47,419 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:41:47,419 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:41:47,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:47 BoogieIcfgContainer [2022-10-17 17:41:47,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:41:47,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:41:47,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:41:47,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:41:47,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:41:46" (1/3) ... [2022-10-17 17:41:47,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74629002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:47, skipping insertion in model container [2022-10-17 17:41:47,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:46" (2/3) ... [2022-10-17 17:41:47,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74629002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:47, skipping insertion in model container [2022-10-17 17:41:47,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:47" (3/3) ... [2022-10-17 17:41:47,438 INFO L112 eAbstractionObserver]: Analyzing ICFG inv_Newton-1.c [2022-10-17 17:41:47,481 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:41:47,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:41:47,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:41:47,552 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@58e532a5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:41:47,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:41:47,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-17 17:41:47,563 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:47,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-17 17:41:47,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:47,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2366848, now seen corresponding path program 1 times [2022-10-17 17:41:47,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:47,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819087314] [2022-10-17 17:41:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:47,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:47,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:41:47,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819087314] [2022-10-17 17:41:47,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819087314] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:47,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:47,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:41:47,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724233806] [2022-10-17 17:41:47,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:47,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:41:47,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:41:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:41:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:41:47,959 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:48,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:48,025 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-10-17 17:41:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:41:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-10-17 17:41:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:48,051 INFO L225 Difference]: With dead ends: 13 [2022-10-17 17:41:48,052 INFO L226 Difference]: Without dead ends: 6 [2022-10-17 17:41:48,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:41:48,086 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:48,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:41:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-10-17 17:41:48,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-10-17 17:41:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-10-17 17:41:48,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-10-17 17:41:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:48,125 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-10-17 17:41:48,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-10-17 17:41:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-17 17:41:48,126 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:48,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-17 17:41:48,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:41:48,127 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:48,128 INFO L85 PathProgramCache]: Analyzing trace with hash 72614026, now seen corresponding path program 1 times [2022-10-17 17:41:48,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:41:48,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917171333] [2022-10-17 17:41:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:48,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:41:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:41:48,214 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 17:41:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 17:41:48,319 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-10-17 17:41:48,319 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 17:41:48,321 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 17:41:48,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:41:48,336 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 17:41:48,341 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 17:41:48,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 05:41:48 BoogieIcfgContainer [2022-10-17 17:41:48,371 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 17:41:48,371 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 17:41:48,371 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 17:41:48,372 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 17:41:48,372 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:47" (3/4) ... [2022-10-17 17:41:48,374 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-10-17 17:41:48,374 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 17:41:48,375 INFO L158 Benchmark]: Toolchain (without parser) took 1813.28ms. Allocated memory is still 98.6MB. Free memory was 58.9MB in the beginning and 63.7MB in the end (delta: -4.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:41:48,376 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 98.6MB. Free memory is still 75.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:41:48,376 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.52ms. Allocated memory is still 98.6MB. Free memory was 58.7MB in the beginning and 73.8MB in the end (delta: -15.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-10-17 17:41:48,377 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.08ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 72.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 17:41:48,377 INFO L158 Benchmark]: Boogie Preprocessor took 36.88ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 70.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:41:48,378 INFO L158 Benchmark]: RCFGBuilder took 462.85ms. Allocated memory is still 98.6MB. Free memory was 70.6MB in the beginning and 55.0MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-10-17 17:41:48,379 INFO L158 Benchmark]: TraceAbstraction took 946.65ms. Allocated memory is still 98.6MB. Free memory was 54.4MB in the beginning and 63.8MB in the end (delta: -9.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:41:48,379 INFO L158 Benchmark]: Witness Printer took 3.22ms. Allocated memory is still 98.6MB. Free memory was 63.8MB in the beginning and 63.7MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 17:41:48,383 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 98.6MB. Free memory is still 75.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 310.52ms. Allocated memory is still 98.6MB. Free memory was 58.7MB in the beginning and 73.8MB in the end (delta: -15.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.08ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 72.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.88ms. Allocated memory is still 98.6MB. Free memory was 72.1MB in the beginning and 70.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 462.85ms. Allocated memory is still 98.6MB. Free memory was 70.6MB in the beginning and 55.0MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 946.65ms. Allocated memory is still 98.6MB. Free memory was 54.4MB in the beginning and 63.8MB in the end (delta: -9.4MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.22ms. Allocated memory is still 98.6MB. Free memory was 63.8MB in the beginning and 63.7MB in the end (delta: 143.4kB). There was no memory consumed. 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: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 30, overapproximation of someBinaryArithmeticDOUBLEoperation at line 36, overapproximation of someBinaryDOUBLEComparisonOperation at line 53, overapproximation of to_real at line 31. Possible FailurePath: [L46] double a,r; [L48] a = __VERIFIER_nondet_double() [L49] CALL assume_abort_if_not(a >= 20. && a <= 30.) [L14] COND FALSE !(!cond) [L49] RET assume_abort_if_not(a >= 20. && a <= 30.) [L51] CALL, EXPR inv(a) [L26] double xi, xsi, temp; [L27] signed int cond, exp; [L28] union double_int A_u, xi_u; [L29] A_u.d = A [L30] EXPR A_u.i [L30] exp = (signed int) ((A_u.i & 0x7FF0000000000000) >> 52) - 1023 [L31] xi_u.d = 1 [L32] xi_u.i = (((long long)(1023-exp)) << 52) [L33] EXPR xi_u.d [L33] xi = xi_u.d [L34] cond = 1 VAL [\old(A)=9214364837600034830, A=9214364837600034830, A_u={5:0}, cond=1, exp=-1023, xi=9214364837600034829, xi_u={4:0}] [L35] COND TRUE \read(cond) [L36] xsi = 2*xi-A*xi*xi [L37] temp = xsi-xi [L38] cond = ((temp > 1e-10) || (temp < -1e-10)) [L39] xi = xsi VAL [\old(A)=9214364837600034830, A=9214364837600034830, A_u={5:0}, cond=0, exp=-1023, xi=9214364837600034831, xi_u={4:0}, xsi=9214364837600034831] [L35] COND FALSE !(\read(cond)) [L41] return xi; [L41] return xi; [L41] return xi; [L51] RET, EXPR inv(a) [L51] r = inv(a) [L53] CALL __VERIFIER_assert(r >= 0 && r <= 0.06) [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7 IncrementalHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 3 mSDtfsCounter, 7 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 [2022-10-17 17:41:48,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/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_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_Newton-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta --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 7c5bb845798e00aa3572bfadf1cd4653d0b05182832339d0260ef999baa89392 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:41:50,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:41:50,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:41:50,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:41:50,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:41:50,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:41:50,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:41:50,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:41:50,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:41:50,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:41:50,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:41:50,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:41:50,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:41:50,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:41:50,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:41:50,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:41:50,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:41:50,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:41:50,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:41:50,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:41:50,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:41:50,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:41:50,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:41:50,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:41:50,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:41:50,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:41:50,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:41:50,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:41:50,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:41:50,943 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:41:50,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:41:50,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:41:50,947 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:41:50,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:41:50,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:41:50,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:41:50,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:41:50,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:41:50,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:41:50,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:41:50,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:41:50,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-10-17 17:41:51,010 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:41:51,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:41:51,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:41:51,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:41:51,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:41:51,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:41:51,013 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:41:51,013 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:41:51,014 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:41:51,014 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:41:51,015 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:41:51,015 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:41:51,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:41:51,017 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:41:51,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:41:51,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:41:51,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:41:51,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:41:51,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:41:51,018 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:41:51,018 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-10-17 17:41:51,018 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-10-17 17:41:51,018 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:41:51,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:41:51,019 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:41:51,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:41:51,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:41:51,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 17:41:51,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:41:51,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:51,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:41:51,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:41:51,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:41:51,021 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-10-17 17:41:51,021 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-10-17 17:41:51,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:41:51,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:41:51,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-10-17 17:41:51,022 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_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c5bb845798e00aa3572bfadf1cd4653d0b05182832339d0260ef999baa89392 [2022-10-17 17:41:51,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:41:51,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:41:51,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:41:51,467 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:41:51,468 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:41:51,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/float-benchs/inv_Newton-1.c [2022-10-17 17:41:51,552 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/data/08b60f746/22a0e6f98188450fa997f4b6df408367/FLAG3aff56a10 [2022-10-17 17:41:52,053 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:41:52,054 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/sv-benchmarks/c/float-benchs/inv_Newton-1.c [2022-10-17 17:41:52,064 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/data/08b60f746/22a0e6f98188450fa997f4b6df408367/FLAG3aff56a10 [2022-10-17 17:41:52,402 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/data/08b60f746/22a0e6f98188450fa997f4b6df408367 [2022-10-17 17:41:52,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:41:52,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:41:52,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:52,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:41:52,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:41:52,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22ca9475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52, skipping insertion in model container [2022-10-17 17:41:52,414 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:41:52,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:41:52,609 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_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/sv-benchmarks/c/float-benchs/inv_Newton-1.c[598,611] [2022-10-17 17:41:52,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:52,641 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:41:52,664 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_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/sv-benchmarks/c/float-benchs/inv_Newton-1.c[598,611] [2022-10-17 17:41:52,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:41:52,723 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:41:52,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52 WrapperNode [2022-10-17 17:41:52,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:41:52,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:52,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:41:52,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:41:52,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,788 INFO L138 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2022-10-17 17:41:52,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:41:52,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:41:52,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:41:52,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:41:52,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,838 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:41:52,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:41:52,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:41:52,854 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:41:52,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (1/1) ... [2022-10-17 17:41:52,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:41:52,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:41:52,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:41:52,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:41:52,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:41:52,934 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2022-10-17 17:41:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2022-10-17 17:41:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-10-17 17:41:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:41:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-10-17 17:41:52,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:41:52,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:41:52,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-10-17 17:41:52,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:41:53,065 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:41:53,067 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:41:55,539 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:41:55,544 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:41:55,544 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 17:41:55,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:55 BoogieIcfgContainer [2022-10-17 17:41:55,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:41:55,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:41:55,550 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:41:55,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:41:55,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:41:52" (1/3) ... [2022-10-17 17:41:55,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ef547b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:55, skipping insertion in model container [2022-10-17 17:41:55,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:41:52" (2/3) ... [2022-10-17 17:41:55,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ef547b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:41:55, skipping insertion in model container [2022-10-17 17:41:55,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:41:55" (3/3) ... [2022-10-17 17:41:55,557 INFO L112 eAbstractionObserver]: Analyzing ICFG inv_Newton-1.c [2022-10-17 17:41:55,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:41:55,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:41:55,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:41:55,634 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@30d067c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:41:55,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:41:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:41:55,643 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:55,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:55,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:55,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:55,650 INFO L85 PathProgramCache]: Analyzing trace with hash -590190995, now seen corresponding path program 1 times [2022-10-17 17:41:55,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:41:55,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843309256] [2022-10-17 17:41:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:55,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:41:55,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:41:55,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:41:55,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-10-17 17:41:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:55,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 17:41:55,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:41:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:55,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:41:55,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:41:55,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843309256] [2022-10-17 17:41:55,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843309256] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:55,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:55,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:41:55,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53965313] [2022-10-17 17:41:55,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:55,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:41:55,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:41:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:41:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:41:55,881 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:55,897 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-10-17 17:41:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:41:55,899 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-10-17 17:41:55,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:55,908 INFO L225 Difference]: With dead ends: 25 [2022-10-17 17:41:55,908 INFO L226 Difference]: Without dead ends: 10 [2022-10-17 17:41:55,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:41:55,917 INFO L413 NwaCegarLoop]: 14 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, 14 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 [2022-10-17 17:41:55,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:41:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-10-17 17:41:55,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-10-17 17:41:55,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2022-10-17 17:41:55,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2022-10-17 17:41:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:55,970 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2022-10-17 17:41:55,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:55,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2022-10-17 17:41:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:41:55,971 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:55,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:55,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:41:56,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:41:56,186 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:56,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:56,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1184816367, now seen corresponding path program 1 times [2022-10-17 17:41:56,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:41:56,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354156903] [2022-10-17 17:41:56,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:56,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:41:56,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:41:56,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:41:56,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-10-17 17:41:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:41:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:41:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:41:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:41:56,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:41:56,369 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-10-17 17:41:56,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354156903] [2022-10-17 17:41:56,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354156903] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:41:56,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:41:56,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:41:56,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15060961] [2022-10-17 17:41:56,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:41:56,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:41:56,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-10-17 17:41:56,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:41:56,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:41:56,373 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:58,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-10-17 17:41:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:41:58,704 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-10-17 17:41:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:41:58,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-10-17 17:41:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:41:58,705 INFO L225 Difference]: With dead ends: 16 [2022-10-17 17:41:58,705 INFO L226 Difference]: Without dead ends: 11 [2022-10-17 17:41:58,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:41:58,707 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:41:58,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-10-17 17:41:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-10-17 17:41:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-10-17 17:41:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2022-10-17 17:41:58,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2022-10-17 17:41:58,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:41:58,713 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2022-10-17 17:41:58,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:41:58,714 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2022-10-17 17:41:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:41:58,714 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:41:58,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:41:58,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:41:58,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 [2022-10-17 17:41:58,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:41:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:41:58,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1873743609, now seen corresponding path program 1 times [2022-10-17 17:41:58,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-10-17 17:41:58,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857555239] [2022-10-17 17:41:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:41:58,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-10-17 17:41:58,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat [2022-10-17 17:41:58,919 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-10-17 17:41:58,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb5b3e6b-36cc-4e9d-b40a-91b9fe6a112c/bin/utaipan-G1rejxKTta/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-10-17 17:42:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:42:00,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-17 17:42:00,506 INFO L286 TraceCheckSpWp]: Computing forward predicates...