./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/filter1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF --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 0f607249994cf0ffcacc9c07747c47cb351729bf7053d82a0bf430a6b6707eef --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:23:54,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:23:54,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:23:54,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:23:54,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:23:54,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:23:54,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:23:54,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:23:54,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:23:54,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:23:54,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:23:54,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:23:54,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:23:54,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:23:54,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:23:54,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:23:54,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:23:54,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:23:54,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:23:54,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:23:54,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:23:54,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:23:54,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:23:54,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:23:54,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:23:54,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:23:54,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:23:54,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:23:54,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:23:54,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:23:54,950 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:23:54,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:23:54,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:23:54,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:23:54,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:23:54,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:23:54,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:23:54,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:23:54,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:23:54,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:23:54,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:23:54,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:23:55,001 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:23:55,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:23:55,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:23:55,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:23:55,003 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:23:55,003 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:23:55,003 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:23:55,004 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:23:55,010 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:23:55,010 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:23:55,011 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:23:55,012 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:23:55,012 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:23:55,012 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:23:55,012 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:23:55,013 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:23:55,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:23:55,014 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:23:55,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:23:55,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:23:55,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:23:55,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:23:55,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:23:55,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:23:55,015 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:23:55,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:23:55,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:23:55,016 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:23:55,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:23:55,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:23:55,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:23:55,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:55,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:23:55,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:23:55,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:23:55,020 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:23:55,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:23:55,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:23:55,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:23:55,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:23:55,021 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f607249994cf0ffcacc9c07747c47cb351729bf7053d82a0bf430a6b6707eef [2021-11-12 23:23:55,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:23:55,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:23:55,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:23:55,313 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:23:55,314 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:23:55,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/float-benchs/filter1.c [2021-11-12 23:23:55,381 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/data/6f0584b95/dfa2254c28d74121a20d822262be87fe/FLAG23329218a [2021-11-12 23:23:55,813 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:23:55,813 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/sv-benchmarks/c/float-benchs/filter1.c [2021-11-12 23:23:55,824 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/data/6f0584b95/dfa2254c28d74121a20d822262be87fe/FLAG23329218a [2021-11-12 23:23:56,212 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/data/6f0584b95/dfa2254c28d74121a20d822262be87fe [2021-11-12 23:23:56,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:23:56,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:23:56,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:56,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:23:56,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:23:56,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b23968a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56, skipping insertion in model container [2021-11-12 23:23:56,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:23:56,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:23:56,434 WARN L228 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_306cc901-d259-4f70-a5a8-7178f184ff3c/sv-benchmarks/c/float-benchs/filter1.c[627,640] [2021-11-12 23:23:56,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:56,461 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:23:56,474 WARN L228 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_306cc901-d259-4f70-a5a8-7178f184ff3c/sv-benchmarks/c/float-benchs/filter1.c[627,640] [2021-11-12 23:23:56,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:23:56,491 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:23:56,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56 WrapperNode [2021-11-12 23:23:56,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:23:56,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:56,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:23:56,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:23:56,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:23:56,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:23:56,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:23:56,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:23:56,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:23:56,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:23:56,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:23:56,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:23:56,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56" (1/1) ... [2021-11-12 23:23:56,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:56,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:23:56,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:23:56,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:23:56,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:23:56,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:23:56,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:23:56,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:23:56,821 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:23:56,825 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:23:56,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:56 BoogieIcfgContainer [2021-11-12 23:23:56,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:23:56,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:23:56,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:23:56,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:23:56,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:23:56" (1/3) ... [2021-11-12 23:23:56,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e4701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:23:56, skipping insertion in model container [2021-11-12 23:23:56,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:23:56" (2/3) ... [2021-11-12 23:23:56,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14e4701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:23:56, skipping insertion in model container [2021-11-12 23:23:56,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:56" (3/3) ... [2021-11-12 23:23:56,835 INFO L111 eAbstractionObserver]: Analyzing ICFG filter1.c [2021-11-12 23:23:56,840 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:23:56,840 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:23:56,889 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:23:56,896 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:23:56,897 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:23:56,910 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) [2021-11-12 23:23:56,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:23:56,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:23:56,915 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:23:56,916 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:23:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:23:56,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2376458, now seen corresponding path program 1 times [2021-11-12 23:23:56,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:23:56,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576731713] [2021-11-12 23:23:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:23:56,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:23:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:23:57,040 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:23:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:23:57,092 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 23:23:57,094 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:23:57,095 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:23:57,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:23:57,101 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-12 23:23:57,103 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:23:57,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:23:57 BoogieIcfgContainer [2021-11-12 23:23:57,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:23:57,129 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:23:57,129 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:23:57,129 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:23:57,130 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:23:56" (3/4) ... [2021-11-12 23:23:57,133 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:23:57,133 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:23:57,137 INFO L158 Benchmark]: Toolchain (without parser) took 920.69ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 53.4MB in the beginning and 84.2MB in the end (delta: -30.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:23:57,137 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 90.2MB. Free memory was 69.8MB in the beginning and 69.7MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:23:57,140 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.93ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 53.2MB in the beginning and 85.1MB in the end (delta: -31.9MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-11-12 23:23:57,147 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.64ms. Allocated memory is still 109.1MB. Free memory was 85.1MB in the beginning and 83.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:23:57,152 INFO L158 Benchmark]: Boogie Preprocessor took 22.16ms. Allocated memory is still 109.1MB. Free memory was 83.4MB in the beginning and 82.5MB in the end (delta: 890.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:23:57,153 INFO L158 Benchmark]: RCFGBuilder took 277.13ms. Allocated memory is still 109.1MB. Free memory was 82.5MB in the beginning and 71.8MB in the end (delta: 10.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:23:57,155 INFO L158 Benchmark]: TraceAbstraction took 296.01ms. Allocated memory is still 109.1MB. Free memory was 71.2MB in the beginning and 85.0MB in the end (delta: -13.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 23:23:57,155 INFO L158 Benchmark]: Witness Printer took 4.73ms. Allocated memory is still 109.1MB. Free memory was 84.6MB in the beginning and 84.2MB in the end (delta: 427.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:23:57,164 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 90.2MB. Free memory was 69.8MB in the beginning and 69.7MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.93ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 53.2MB in the beginning and 85.1MB in the end (delta: -31.9MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.64ms. Allocated memory is still 109.1MB. Free memory was 85.1MB in the beginning and 83.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.16ms. Allocated memory is still 109.1MB. Free memory was 83.4MB in the beginning and 82.5MB in the end (delta: 890.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 277.13ms. Allocated memory is still 109.1MB. Free memory was 82.5MB in the beginning and 71.8MB in the end (delta: 10.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 296.01ms. Allocated memory is still 109.1MB. Free memory was 71.2MB in the beginning and 85.0MB in the end (delta: -13.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Witness Printer took 4.73ms. Allocated memory is still 109.1MB. Free memory was 84.6MB in the beginning and 84.2MB in the end (delta: 427.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 31, overapproximation of to_real at line 34, overapproximation of someBinaryArithmeticDOUBLEoperation at line 37. Possible FailurePath: [L22] double E0, E1, S; [L23] int i; [L25] E1 = 0 [L26] S = 0 [L28] i = 0 VAL [i=0] [L28] COND TRUE i <= 1000000 [L30] E0 = __VERIFIER_nondet_double() [L31] CALL assume_abort_if_not(E0 >= -1. && E0 <= 1.) [L15] COND FALSE !(!cond) [L31] RET assume_abort_if_not(E0 >= -1. && E0 <= 1.) [L33] COND TRUE __VERIFIER_nondet_int() [L34] S = 0 [L39] E1 = E0 [L41] CALL __VERIFIER_assert(S >= -10000. && S <= 10000.) [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L17] 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: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 23:23:57,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/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_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF --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 0f607249994cf0ffcacc9c07747c47cb351729bf7053d82a0bf430a6b6707eef --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:23:59,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:23:59,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:23:59,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:23:59,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:23:59,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:23:59,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:23:59,549 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:23:59,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:23:59,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:23:59,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:23:59,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:23:59,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:23:59,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:23:59,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:23:59,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:23:59,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:23:59,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:23:59,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:23:59,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:23:59,585 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:23:59,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:23:59,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:23:59,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:23:59,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:23:59,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:23:59,593 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:23:59,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:23:59,595 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:23:59,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:23:59,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:23:59,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:23:59,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:23:59,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:23:59,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:23:59,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:23:59,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:23:59,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:23:59,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:23:59,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:23:59,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:23:59,604 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:23:59,648 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:23:59,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:23:59,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:23:59,649 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:23:59,650 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:23:59,650 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:23:59,650 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:23:59,650 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:23:59,650 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:23:59,651 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:23:59,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:23:59,653 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:23:59,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:23:59,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:23:59,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:23:59,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:23:59,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:23:59,654 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:23:59,654 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:23:59,654 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:23:59,655 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:23:59,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:23:59,655 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:23:59,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:23:59,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:23:59,656 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:23:59,656 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:23:59,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:23:59,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:23:59,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:23:59,657 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:23:59,657 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:23:59,657 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:23:59,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:23:59,658 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:23:59,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:23:59,658 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_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f607249994cf0ffcacc9c07747c47cb351729bf7053d82a0bf430a6b6707eef [2021-11-12 23:24:00,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:24:00,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:24:00,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:24:00,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:24:00,060 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:24:00,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/float-benchs/filter1.c [2021-11-12 23:24:00,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/data/1b1f5cf8d/b5d3aa79d3d54ebbaf020f4f554fe19c/FLAG5835f3b1f [2021-11-12 23:24:00,562 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:24:00,563 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/sv-benchmarks/c/float-benchs/filter1.c [2021-11-12 23:24:00,569 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/data/1b1f5cf8d/b5d3aa79d3d54ebbaf020f4f554fe19c/FLAG5835f3b1f [2021-11-12 23:24:00,968 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/data/1b1f5cf8d/b5d3aa79d3d54ebbaf020f4f554fe19c [2021-11-12 23:24:00,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:24:00,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:24:00,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:24:00,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:24:00,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:24:00,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:24:00" (1/1) ... [2021-11-12 23:24:00,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b1e5e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:00, skipping insertion in model container [2021-11-12 23:24:00,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:24:00" (1/1) ... [2021-11-12 23:24:00,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:24:01,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:24:01,159 WARN L228 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_306cc901-d259-4f70-a5a8-7178f184ff3c/sv-benchmarks/c/float-benchs/filter1.c[627,640] [2021-11-12 23:24:01,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:24:01,187 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:24:01,198 WARN L228 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_306cc901-d259-4f70-a5a8-7178f184ff3c/sv-benchmarks/c/float-benchs/filter1.c[627,640] [2021-11-12 23:24:01,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:24:01,217 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:24:01,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01 WrapperNode [2021-11-12 23:24:01,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:24:01,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:24:01,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:24:01,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:24:01,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01" (1/1) ... [2021-11-12 23:24:01,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01" (1/1) ... [2021-11-12 23:24:01,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:24:01,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:24:01,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:24:01,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:24:01,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01" (1/1) ... [2021-11-12 23:24:01,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01" (1/1) ... [2021-11-12 23:24:01,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01" (1/1) ... [2021-11-12 23:24:01,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01" (1/1) ... [2021-11-12 23:24:01,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01" (1/1) ... [2021-11-12 23:24:01,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01" (1/1) ... [2021-11-12 23:24:01,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01" (1/1) ... [2021-11-12 23:24:01,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:24:01,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:24:01,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:24:01,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:24:01,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01" (1/1) ... [2021-11-12 23:24:01,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:24:01,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:24:01,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:24:01,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:24:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:24:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:24:01,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:24:01,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:24:03,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:24:03,717 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:24:03,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:03 BoogieIcfgContainer [2021-11-12 23:24:03,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:24:03,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:24:03,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:24:03,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:24:03,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:24:00" (1/3) ... [2021-11-12 23:24:03,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765f0987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:24:03, skipping insertion in model container [2021-11-12 23:24:03,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:24:01" (2/3) ... [2021-11-12 23:24:03,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765f0987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:24:03, skipping insertion in model container [2021-11-12 23:24:03,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:24:03" (3/3) ... [2021-11-12 23:24:03,727 INFO L111 eAbstractionObserver]: Analyzing ICFG filter1.c [2021-11-12 23:24:03,732 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:24:03,733 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:24:03,777 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:24:03,784 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:24:03,785 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:24:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:24:03,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:03,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:03,802 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:03,807 INFO L85 PathProgramCache]: Analyzing trace with hash -332259343, now seen corresponding path program 1 times [2021-11-12 23:24:03,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:03,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141690690] [2021-11-12 23:24:03,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:03,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:03,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:03,825 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:03,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:24:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:03,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:24:03,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:03,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:03,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:03,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141690690] [2021-11-12 23:24:03,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141690690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:03,985 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:03,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:24:03,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812321431] [2021-11-12 23:24:03,988 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:03,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:24:03,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:04,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:24:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:24:04,023 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 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) [2021-11-12 23:24:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:04,038 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-11-12 23:24:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:24:04,040 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 [2021-11-12 23:24:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:04,048 INFO L225 Difference]: With dead ends: 30 [2021-11-12 23:24:04,048 INFO L226 Difference]: Without dead ends: 12 [2021-11-12 23:24:04,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:24:04,055 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.53ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:04,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.53ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:24:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-12 23:24:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-12 23:24:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-12 23:24:04,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2021-11-12 23:24:04,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:04,087 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-12 23:24:04,087 INFO L471 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) [2021-11-12 23:24:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-12 23:24:04,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:24:04,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:04,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:04,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:04,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:04,307 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:04,308 INFO L85 PathProgramCache]: Analyzing trace with hash -275001041, now seen corresponding path program 1 times [2021-11-12 23:24:04,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:04,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5822308] [2021-11-12 23:24:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:04,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:04,313 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:04,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:24:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:04,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:24:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:04,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:04,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:24:04,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5822308] [2021-11-12 23:24:04,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5822308] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:24:04,774 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:24:04,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:24:04,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844447875] [2021-11-12 23:24:04,774 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:24:04,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:24:04,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:24:04,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:24:04,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:24:04,777 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:06,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:24:06,319 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-12 23:24:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:24:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 [2021-11-12 23:24:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:24:06,321 INFO L225 Difference]: With dead ends: 30 [2021-11-12 23:24:06,321 INFO L226 Difference]: Without dead ends: 28 [2021-11-12 23:24:06,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:24:06,324 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1340.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.22ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1408.87ms IncrementalHoareTripleChecker+Time [2021-11-12 23:24:06,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 41 Invalid, 38 Unknown, 0 Unchecked, 2.22ms Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 1408.87ms Time] [2021-11-12 23:24:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-12 23:24:06,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 14. [2021-11-12 23:24:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-12 23:24:06,330 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-11-12 23:24:06,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:24:06,331 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-12 23:24:06,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:24:06,331 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-12 23:24:06,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-12 23:24:06,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:24:06,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:24:06,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:24:06,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:24:06,558 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:24:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:24:06,558 INFO L85 PathProgramCache]: Analyzing trace with hash -274941459, now seen corresponding path program 1 times [2021-11-12 23:24:06,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:24:06,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244971439] [2021-11-12 23:24:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:24:06,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:24:06,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:24:06,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:24:06,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:24:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:24:07,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:24:07,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:24:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:24:07,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:24:18,315 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |c_ULTIMATE.start_main_~E0~0#1|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1))) is different from false [2021-11-12 23:24:20,359 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |c_ULTIMATE.start_main_~E0~0#1|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1))) is different from true [2021-11-12 23:24:43,202 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |c_ULTIMATE.start_main_~E0~0#1|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1)))) is different from false [2021-11-12 23:24:45,248 WARN L860 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |c_ULTIMATE.start_main_~E0~0#1|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1)))) is different from true [2021-11-12 23:25:28,741 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~E0~0#1_6| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (not (fp.geq |v_ULTIMATE.start_main_~E0~0#1_6| (fp.neg .cse0))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |v_ULTIMATE.start_main_~E0~0#1_6|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse1 (fp.neg .cse2)) (fp.leq .cse1 .cse2))) (not (fp.leq |v_ULTIMATE.start_main_~E0~0#1_6| .cse0))))) is different from true [2021-11-12 23:25:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:25:28,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:25:28,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244971439] [2021-11-12 23:25:28,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244971439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:25:28,798 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:25:28,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-12 23:25:28,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000685262] [2021-11-12 23:25:28,798 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:25:28,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:25:28,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:28,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:25:28,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=60, Unknown=5, NotChecked=54, Total=156 [2021-11-12 23:25:28,800 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) 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) [2021-11-12 23:25:30,879 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32)))) (and (forall ((|v_ULTIMATE.start_main_~E0~0#1_6| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (not (fp.geq |v_ULTIMATE.start_main_~E0~0#1_6| (fp.neg .cse0))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |v_ULTIMATE.start_main_~E0~0#1_6|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse1 (fp.neg .cse2)) (fp.leq .cse1 .cse2))) (not (fp.leq |v_ULTIMATE.start_main_~E0~0#1_6| .cse0))))) (= |c_ULTIMATE.start_main_~E1~0#1| .cse3) (= .cse3 |c_ULTIMATE.start_main_~S~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-12 23:25:32,938 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (.cse1 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)))) (and (= |c_ULTIMATE.start_main_~E1~0#1| .cse0) (= .cse0 |c_ULTIMATE.start_main_~S~0#1|) (or .cse1 (let ((.cse2 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |c_ULTIMATE.start_main_~E0~0#1|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse3 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse2 (fp.neg .cse3)) (fp.leq .cse2 .cse3)))) (let ((.cse6 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (let ((.cse4 (fp.geq |c_ULTIMATE.start_main_~E0~0#1| (fp.neg .cse6))) (.cse5 (fp.leq |c_ULTIMATE.start_main_~E0~0#1| .cse6))) (or (and .cse4 .cse5 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and .cse1 (or (not .cse4) (not .cse5)))))) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-12 23:25:35,496 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0)) (.cse3 ((_ to_fp 11 53) c_currentRoundingMode (_ bv0 32))) (.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |c_ULTIMATE.start_main_~E0~0#1|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq |c_ULTIMATE.start_main_~E0~0#1| (fp.neg .cse0)) (fp.leq |c_ULTIMATE.start_main_~E0~0#1| .cse0) (fp.geq .cse1 (fp.neg .cse2)) (= |c_ULTIMATE.start_main_~E1~0#1| .cse3) (= .cse3 |c_ULTIMATE.start_main_~S~0#1|) (fp.leq .cse1 .cse2) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-12 23:25:38,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:40,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:25:40,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:40,636 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-11-12 23:25:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:25:40,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) 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) Word has length 9 [2021-11-12 23:25:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:40,638 INFO L225 Difference]: With dead ends: 32 [2021-11-12 23:25:40,638 INFO L226 Difference]: Without dead ends: 30 [2021-11-12 23:25:40,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=62, Invalid=110, Unknown=8, NotChecked=162, Total=342 [2021-11-12 23:25:40,641 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4920.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 4980.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:40,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 64 Invalid, 130 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 2 Unknown, 89 Unchecked, 4980.05ms Time] [2021-11-12 23:25:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-12 23:25:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2021-11-12 23:25:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:25:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-12 23:25:40,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 9 [2021-11-12 23:25:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:40,647 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-12 23:25:40,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) 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) [2021-11-12 23:25:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-12 23:25:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-12 23:25:40,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:40,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:40,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:40,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:40,869 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:40,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:40,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1443795685, now seen corresponding path program 1 times [2021-11-12 23:25:40,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:40,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842955066] [2021-11-12 23:25:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:25:40,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:40,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:40,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:40,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:25:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:25:41,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:25:41,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:26:17,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:29,599 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |c_ULTIMATE.start_main_~E0~0#1|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1))) is different from false [2021-11-12 23:26:31,643 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |c_ULTIMATE.start_main_~E0~0#1|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1))) is different from true [2021-11-12 23:26:54,387 WARN L838 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |c_ULTIMATE.start_main_~E0~0#1|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1)))) is different from false [2021-11-12 23:26:56,433 WARN L860 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)) (let ((.cse0 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |c_ULTIMATE.start_main_~E0~0#1|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse0 (fp.neg .cse1)) (fp.leq .cse0 .cse1)))) is different from true [2021-11-12 23:27:39,792 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~E0~0#1_8| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (not (fp.leq |v_ULTIMATE.start_main_~E0~0#1_8| .cse0)) (not (fp.geq |v_ULTIMATE.start_main_~E0~0#1_8| (fp.neg .cse0))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |v_ULTIMATE.start_main_~E0~0#1_8|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.leq .cse1 .cse2) (fp.geq .cse1 (fp.neg .cse2))))))) is different from true [2021-11-12 23:30:27,360 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~E0~0#1_8| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (not (fp.leq |v_ULTIMATE.start_main_~E0~0#1_8| .cse0)) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |v_ULTIMATE.start_main_~E0~0#1_8|) |c_ULTIMATE.start_main_~E0~0#1|)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.leq .cse1 .cse2) (fp.geq .cse1 (fp.neg .cse2)))) (not (fp.geq |v_ULTIMATE.start_main_~E0~0#1_8| (fp.neg .cse0)))))) is different from true [2021-11-12 23:31:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-12 23:31:09,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:09,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842955066] [2021-11-12 23:31:09,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842955066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:09,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [777650236] [2021-11-12 23:31:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:31:09,407 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:09,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:09,414 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:09,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 23:31:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:31:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:31:10,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:33:09,697 WARN L838 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~E0~0#1| (_ FloatingPoint 11 53)) (|ULTIMATE.start_main_~E1~0#1| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (not (fp.leq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 999.0 1000.0)) ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) |ULTIMATE.start_main_~E0~0#1|) |ULTIMATE.start_main_~E1~0#1|) ((_ to_fp 11 53) roundNearestTiesToEven 10000.0))) (fp.leq |ULTIMATE.start_main_~E0~0#1| .cse0) (fp.geq |ULTIMATE.start_main_~E1~0#1| (fp.neg .cse0))))) is different from false [2021-11-12 23:33:11,706 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~E0~0#1| (_ FloatingPoint 11 53)) (|ULTIMATE.start_main_~E1~0#1| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven 1.0))) (and (not (fp.leq (fp.sub roundNearestTiesToEven (fp.add roundNearestTiesToEven (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (/ 999.0 1000.0)) ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32))) |ULTIMATE.start_main_~E0~0#1|) |ULTIMATE.start_main_~E1~0#1|) ((_ to_fp 11 53) roundNearestTiesToEven 10000.0))) (fp.leq |ULTIMATE.start_main_~E0~0#1| .cse0) (fp.geq |ULTIMATE.start_main_~E1~0#1| (fp.neg .cse0))))) is different from true [2021-11-12 23:33:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:33:11,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:34:24,533 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~E0~0#1_10| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (not (fp.geq |v_ULTIMATE.start_main_~E0~0#1_10| (fp.neg .cse0))) (not (fp.leq |v_ULTIMATE.start_main_~E0~0#1_10| .cse0)) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |v_ULTIMATE.start_main_~E0~0#1_10|) |c_ULTIMATE.start_main_~E1~0#1|)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse1 (fp.neg .cse2)) (fp.leq .cse1 .cse2)))))) is different from true [2021-11-12 23:37:12,529 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~E0~0#1_10| (_ FloatingPoint 11 53))) (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (or (not (fp.geq |v_ULTIMATE.start_main_~E0~0#1_10| (fp.neg .cse0))) (not (fp.leq |v_ULTIMATE.start_main_~E0~0#1_10| .cse0)) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.add c_currentRoundingMode (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 999.0 1000.0)) |c_ULTIMATE.start_main_~S~0#1|) |v_ULTIMATE.start_main_~E0~0#1_10|) |c_ULTIMATE.start_main_~E0~0#1|)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode 10000.0))) (and (fp.geq .cse1 (fp.neg .cse2)) (fp.leq .cse1 .cse2)))))) is different from true [2021-11-12 23:37:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-12 23:37:46,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [777650236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:37:46,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280304794] [2021-11-12 23:37:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:46,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:37:46,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:37:46,675 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:37:46,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_306cc901-d259-4f70-a5a8-7178f184ff3c/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-12 23:37:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:50,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:37:50,818 INFO L286 TraceCheckSpWp]: Computing forward predicates...