./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/loop-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/loop-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:56:17,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:56:17,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:56:17,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:56:17,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:56:17,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:56:17,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:56:17,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:56:17,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:56:17,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:56:17,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:56:17,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:56:17,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:56:17,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:56:17,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:56:17,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:56:17,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:56:17,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:56:17,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:56:17,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:56:17,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:56:17,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:56:17,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:56:17,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:56:17,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:56:17,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:56:17,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:56:17,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:56:17,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:56:17,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:56:17,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:56:17,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:56:17,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:56:17,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:56:17,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:56:17,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:56:17,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:56:17,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:56:17,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:56:17,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:56:17,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:56:17,851 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:56:17,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:56:17,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:56:17,881 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:56:17,881 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:56:17,882 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:56:17,882 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:56:17,882 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:56:17,883 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:56:17,883 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:56:17,883 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:56:17,883 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:56:17,883 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:56:17,884 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:56:17,884 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:56:17,884 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:56:17,884 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:56:17,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:56:17,885 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:56:17,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:56:17,885 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:56:17,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:56:17,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:56:17,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:56:17,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:56:17,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:56:17,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:56:17,887 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:56:17,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:56:17,887 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:56:17,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:56:17,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:56:17,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:56:17,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:56:17,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:56:17,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:56:17,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:56:17,889 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:56:17,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:56:17,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:56:17,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:56:17,889 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:56:17,890 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_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b [2021-11-25 19:56:18,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:56:18,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:56:18,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:56:18,210 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:56:18,211 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:56:18,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/loop-1.c [2021-11-25 19:56:18,281 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/data/5564ddf5e/198f2fc93fa5442db508f85b070e81e7/FLAG0f827fb64 [2021-11-25 19:56:18,657 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:56:18,658 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/sv-benchmarks/c/float-benchs/loop-1.c [2021-11-25 19:56:18,662 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/data/5564ddf5e/198f2fc93fa5442db508f85b070e81e7/FLAG0f827fb64 [2021-11-25 19:56:19,074 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/data/5564ddf5e/198f2fc93fa5442db508f85b070e81e7 [2021-11-25 19:56:19,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:56:19,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:56:19,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:56:19,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:56:19,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:56:19,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6804fe53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19, skipping insertion in model container [2021-11-25 19:56:19,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:56:19,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:56:19,295 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2021-11-25 19:56:19,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:56:19,314 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:56:19,325 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2021-11-25 19:56:19,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:56:19,340 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:56:19,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19 WrapperNode [2021-11-25 19:56:19,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:56:19,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:56:19,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:56:19,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:56:19,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,371 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2021-11-25 19:56:19,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:56:19,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:56:19,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:56:19,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:56:19,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:56:19,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:56:19,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:56:19,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:56:19,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19" (1/1) ... [2021-11-25 19:56:19,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:56:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:56:19,424 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:56:19,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:56:19,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:56:19,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:56:19,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:56:19,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:56:19,534 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:56:19,535 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:56:19,656 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:56:19,676 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:56:19,676 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:56:19,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:56:19 BoogieIcfgContainer [2021-11-25 19:56:19,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:56:19,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:56:19,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:56:19,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:56:19,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:56:19" (1/3) ... [2021-11-25 19:56:19,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5131b3d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:56:19, skipping insertion in model container [2021-11-25 19:56:19,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:19" (2/3) ... [2021-11-25 19:56:19,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5131b3d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:56:19, skipping insertion in model container [2021-11-25 19:56:19,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:56:19" (3/3) ... [2021-11-25 19:56:19,702 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-1.c [2021-11-25 19:56:19,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:56:19,715 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:56:19,756 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:56:19,764 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:56:19,764 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:56:19,793 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) [2021-11-25 19:56:19,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:56:19,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:19,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:56:19,798 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:19,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2021-11-25 19:56:19,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:56:19,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835396925] [2021-11-25 19:56:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:19,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:56:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:56:19,932 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-25 19:56:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-25 19:56:19,972 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-25 19:56:19,973 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-25 19:56:19,974 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:56:19,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:56:19,980 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-25 19:56:19,983 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:56:20,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:56:20 BoogieIcfgContainer [2021-11-25 19:56:20,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:56:20,007 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:56:20,008 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:56:20,008 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:56:20,008 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:56:19" (3/4) ... [2021-11-25 19:56:20,011 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-25 19:56:20,011 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:56:20,013 INFO L158 Benchmark]: Toolchain (without parser) took 934.15ms. Allocated memory is still 102.8MB. Free memory was 59.8MB in the beginning and 51.6MB in the end (delta: 8.2MB). Peak memory consumption was 6.2MB. Max. memory is 16.1GB. [2021-11-25 19:56:20,014 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 102.8MB. Free memory was 75.9MB in the beginning and 75.8MB in the end (delta: 45.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:56:20,015 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.46ms. Allocated memory is still 102.8MB. Free memory was 59.5MB in the beginning and 76.2MB in the end (delta: -16.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-25 19:56:20,016 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.36ms. Allocated memory is still 102.8MB. Free memory was 76.2MB in the beginning and 74.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:56:20,017 INFO L158 Benchmark]: Boogie Preprocessor took 18.03ms. Allocated memory is still 102.8MB. Free memory was 74.7MB in the beginning and 73.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:56:20,022 INFO L158 Benchmark]: RCFGBuilder took 288.08ms. Allocated memory is still 102.8MB. Free memory was 73.6MB in the beginning and 64.7MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:56:20,023 INFO L158 Benchmark]: TraceAbstraction took 324.17ms. Allocated memory is still 102.8MB. Free memory was 64.4MB in the beginning and 51.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:56:20,024 INFO L158 Benchmark]: Witness Printer took 4.10ms. Allocated memory is still 102.8MB. Free memory was 51.8MB in the beginning and 51.6MB in the end (delta: 270.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:56:20,032 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 102.8MB. Free memory was 75.9MB in the beginning and 75.8MB in the end (delta: 45.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.46ms. Allocated memory is still 102.8MB. Free memory was 59.5MB in the beginning and 76.2MB in the end (delta: -16.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.36ms. Allocated memory is still 102.8MB. Free memory was 76.2MB in the beginning and 74.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.03ms. Allocated memory is still 102.8MB. Free memory was 74.7MB in the beginning and 73.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 288.08ms. Allocated memory is still 102.8MB. Free memory was 73.6MB in the beginning and 64.7MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 324.17ms. Allocated memory is still 102.8MB. Free memory was 64.4MB in the beginning and 51.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 4.10ms. Allocated memory is still 102.8MB. Free memory was 51.8MB in the beginning and 51.6MB in the end (delta: 270.0kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 4]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 14, overapproximation of someBinaryDOUBLEComparisonOperation at line 20. Possible FailurePath: [L8] float x, y, z; [L10] x = 1.f [L11] y = 1e7 [L12] z = 42.f VAL [x=1, y=10000000, z=42] [L14] COND FALSE !(x < y) [L20] CALL __VERIFIER_assert(z >= 0.f && z <= 1e8) [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] 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 [2021-11-25 19:56:20,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/loop-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:56:22,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:56:22,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:56:22,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:56:22,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:56:22,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:56:22,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:56:22,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:56:22,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:56:22,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:56:22,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:56:22,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:56:22,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:56:22,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:56:22,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:56:22,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:56:22,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:56:22,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:56:22,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:56:22,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:56:22,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:56:22,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:56:22,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:56:22,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:56:22,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:56:22,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:56:22,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:56:22,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:56:22,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:56:22,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:56:22,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:56:22,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:56:22,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:56:22,521 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:56:22,522 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:56:22,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:56:22,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:56:22,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:56:22,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:56:22,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:56:22,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:56:22,535 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-25 19:56:22,561 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:56:22,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:56:22,562 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:56:22,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:56:22,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:56:22,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:56:22,563 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:56:22,563 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:56:22,564 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:56:22,564 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:56:22,564 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:56:22,564 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:56:22,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:56:22,565 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:56:22,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:56:22,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:56:22,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:56:22,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:56:22,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:56:22,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:56:22,567 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 19:56:22,567 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 19:56:22,567 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:56:22,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:56:22,568 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:56:22,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:56:22,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:56:22,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 19:56:22,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:56:22,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:56:22,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:56:22,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:56:22,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:56:22,570 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 19:56:22,570 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 19:56:22,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:56:22,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:56:22,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:56:22,571 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_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b [2021-11-25 19:56:22,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:56:22,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:56:22,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:56:22,923 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:56:22,923 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:56:22,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/float-benchs/loop-1.c [2021-11-25 19:56:22,993 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/data/5f8b977de/c4f26da50ec745358b57a9417308d694/FLAGc0656711c [2021-11-25 19:56:23,563 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:56:23,564 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/sv-benchmarks/c/float-benchs/loop-1.c [2021-11-25 19:56:23,569 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/data/5f8b977de/c4f26da50ec745358b57a9417308d694/FLAGc0656711c [2021-11-25 19:56:23,915 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/data/5f8b977de/c4f26da50ec745358b57a9417308d694 [2021-11-25 19:56:23,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:56:23,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:56:23,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:56:23,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:56:23,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:56:23,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:56:23" (1/1) ... [2021-11-25 19:56:23,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@258f2fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:23, skipping insertion in model container [2021-11-25 19:56:23,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:56:23" (1/1) ... [2021-11-25 19:56:23,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:56:23,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:56:24,092 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2021-11-25 19:56:24,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:56:24,115 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:56:24,128 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2021-11-25 19:56:24,131 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:56:24,145 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:56:24,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24 WrapperNode [2021-11-25 19:56:24,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:56:24,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:56:24,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:56:24,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:56:24,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24" (1/1) ... [2021-11-25 19:56:24,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24" (1/1) ... [2021-11-25 19:56:24,179 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 33 [2021-11-25 19:56:24,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:56:24,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:56:24,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:56:24,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:56:24,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24" (1/1) ... [2021-11-25 19:56:24,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24" (1/1) ... [2021-11-25 19:56:24,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24" (1/1) ... [2021-11-25 19:56:24,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24" (1/1) ... [2021-11-25 19:56:24,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24" (1/1) ... [2021-11-25 19:56:24,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24" (1/1) ... [2021-11-25 19:56:24,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24" (1/1) ... [2021-11-25 19:56:24,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:56:24,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:56:24,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:56:24,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:56:24,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24" (1/1) ... [2021-11-25 19:56:24,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:56:24,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:56:24,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:56:24,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:56:24,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:56:24,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 19:56:24,411 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:56:24,412 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:56:25,085 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:56:25,091 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:56:25,091 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:56:25,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:56:25 BoogieIcfgContainer [2021-11-25 19:56:25,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:56:25,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:56:25,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:56:25,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:56:25,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:56:23" (1/3) ... [2021-11-25 19:56:25,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d81463d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:56:25, skipping insertion in model container [2021-11-25 19:56:25,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:56:24" (2/3) ... [2021-11-25 19:56:25,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d81463d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:56:25, skipping insertion in model container [2021-11-25 19:56:25,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:56:25" (3/3) ... [2021-11-25 19:56:25,101 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-1.c [2021-11-25 19:56:25,106 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:56:25,106 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:56:25,190 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:56:25,197 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:56:25,197 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:56:25,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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) [2021-11-25 19:56:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:56:25,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:25,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:56:25,231 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:25,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:25,236 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-11-25 19:56:25,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:56:25,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777343725] [2021-11-25 19:56:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:25,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:56:25,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:56:25,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:56:25,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 19:56:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:25,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:56:25,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:25,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:56:25,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:56:25,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777343725] [2021-11-25 19:56:25,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777343725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:56:25,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:56:25,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:56:25,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553396507] [2021-11-25 19:56:25,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:56:25,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:56:25,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:56:25,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:56:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:25,551 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:56:25,566 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-25 19:56:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:56:25,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 19:56:25,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:56:25,581 INFO L225 Difference]: With dead ends: 20 [2021-11-25 19:56:25,581 INFO L226 Difference]: Without dead ends: 8 [2021-11-25 19:56:25,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:56:25,589 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:56:25,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 2 Unchecked, 0.0s Time] [2021-11-25 19:56:25,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-25 19:56:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-25 19:56:25,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2021-11-25 19:56:25,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-25 19:56:25,621 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-25 19:56:25,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:56:25,621 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-25 19:56:25,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:56:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-25 19:56:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:56:25,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:56:25,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:56:25,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:56:25,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 19:56:25,837 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:56:25,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:56:25,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-11-25 19:56:25,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:56:25,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150322817] [2021-11-25 19:56:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:25,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:56:25,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:56:25,843 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:56:25,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 19:56:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:25,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:56:25,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:26,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:56:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:29,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:56:29,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150322817] [2021-11-25 19:56:29,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150322817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:56:29,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1411020470] [2021-11-25 19:56:29,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:29,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:56:29,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:56:29,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:56:29,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-25 19:56:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:29,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:56:29,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:30,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:30,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:56:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:30,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1411020470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:56:30,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517815103] [2021-11-25 19:56:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:56:30,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:56:30,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:56:30,518 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:56:30,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:56:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:56:30,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:56:30,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:56:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:31,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:56:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:56:39,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517815103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:56:39,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:56:39,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 14 [2021-11-25 19:56:39,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530761098] [2021-11-25 19:56:39,578 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:56:39,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:56:39,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:56:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:56:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=141, Unknown=1, NotChecked=0, Total=182 [2021-11-25 19:56:39,583 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:57:02,749 WARN L227 SmtUtils]: Spent 14.89s on a formula simplification. DAG size of input: 23 DAG size of output: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:57:04,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:57:06,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:57:14,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:57:15,403 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:57:17,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 19:57:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:57:18,652 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-11-25 19:57:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:57:18,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 19:57:18,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:57:18,654 INFO L225 Difference]: With dead ends: 15 [2021-11-25 19:57:18,654 INFO L226 Difference]: Without dead ends: 11 [2021-11-25 19:57:18,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=75, Invalid=228, Unknown=3, NotChecked=0, Total=306 [2021-11-25 19:57:18,657 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 10 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:57:18,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 42 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2021-11-25 19:57:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-25 19:57:18,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-25 19:57:18,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:57:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-25 19:57:18,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-11-25 19:57:18,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:57:18,664 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-25 19:57:18,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:57:18,664 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-25 19:57:18,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:57:18,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:57:18,665 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-11-25 19:57:18,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:57:18,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:57:19,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-25 19:57:19,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 19:57:19,288 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:57:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:57:19,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2021-11-25 19:57:19,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 19:57:19,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912968410] [2021-11-25 19:57:19,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:57:19,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 19:57:19,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 19:57:19,292 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 19:57:19,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 19:57:19,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:57:19,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:57:19,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:57:19,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:57:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:57:20,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:08,810 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (fp.lt (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0) .cse0) .cse0) .cse0) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse0) .cse0) .cse0) .cse0))) is different from false [2021-11-25 19:58:10,833 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (fp.lt (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0) .cse0) .cse0) .cse0) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse0) .cse0) .cse0) .cse0))) is different from true [2021-11-25 19:58:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-25 19:58:10,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 19:58:10,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912968410] [2021-11-25 19:58:10,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912968410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:58:10,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1973190303] [2021-11-25 19:58:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:58:10,842 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 19:58:10,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 19:58:10,850 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 19:58:10,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-25 19:58:11,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:58:11,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:58:11,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:58:11,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:11,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-25 19:58:20,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1973190303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:58:20,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074560319] [2021-11-25 19:58:20,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 19:58:20,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:20,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:20,406 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:58:20,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:58:21,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 19:58:21,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:58:21,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 19:58:21,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:21,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:56,405 WARN L227 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:59:14,655 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse4 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse2)) (.cse3 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse2))) (let ((.cse0 (fp.add c_currentRoundingMode .cse3 .cse2)) (.cse1 (fp.sub c_currentRoundingMode .cse4 .cse2))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse2) (fp.sub c_currentRoundingMode .cse1 .cse2)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse3 .cse4)))))) is different from true [2021-11-25 19:59:39,014 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse4)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse4) (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse5 .cse6))))))) is different from true [2021-11-25 19:59:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2021-11-25 19:59:39,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074560319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:39,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 19:59:39,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 17 [2021-11-25 19:59:39,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632420313] [2021-11-25 19:59:39,033 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:39,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 19:59:39,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 19:59:39,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 19:59:39,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=111, Unknown=16, NotChecked=78, Total=272 [2021-11-25 19:59:39,035 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:41,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 19:59:46,201 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse7 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse7)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse7))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse7)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse7))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse7)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse7))) (let ((.cse4 (fp.lt (fp.add c_currentRoundingMode .cse2 .cse7) (fp.sub c_currentRoundingMode .cse3 .cse7)))) (and (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 10000000.0)) |c_ULTIMATE.start_main_~y~0#1|) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) .cse4 (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse5 .cse6))) .cse4 (= .cse7 |c_ULTIMATE.start_main_~x~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))))))) is different from true [2021-11-25 20:00:26,137 WARN L227 SmtUtils]: Spent 18.44s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:00:28,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:00:46,751 WARN L227 SmtUtils]: Spent 9.23s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:00:48,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:00:50,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:00:52,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:01:02,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:01:05,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:01:07,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:01:13,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:01:15,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:01:17,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:01:19,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:01:48,973 WARN L227 SmtUtils]: Spent 21.22s on a formula simplification. DAG size of input: 19 DAG size of output: 18 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:01:50,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:01:53,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-25 20:01:54,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:54,176 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-25 20:01:54,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 20:01:54,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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 10 [2021-11-25 20:01:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:54,198 INFO L225 Difference]: With dead ends: 20 [2021-11-25 20:01:54,198 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 20:01:54,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 173.8s TimeCoverageRelationStatistics Valid=144, Invalid=231, Unknown=21, NotChecked=156, Total=552 [2021-11-25 20:01:54,199 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 23 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 37.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:54,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 13 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 42 Invalid, 11 Unknown, 35 Unchecked, 37.7s Time] [2021-11-25 20:01:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 20:01:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 20:01:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-25 20:01:54,206 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 10 [2021-11-25 20:01:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:54,207 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-25 20:01:54,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-25 20:01:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:01:54,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:54,208 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2021-11-25 20:01:54,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:01:54,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-25 20:01:54,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:01:54,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 20:01:54,812 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:01:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:54,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 3 times [2021-11-25 20:01:54,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 20:01:54,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584264164] [2021-11-25 20:01:54,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:01:54,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 20:01:54,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 20:01:54,815 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 20:01:54,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 20:01:55,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 20:01:55,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:01:55,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 20:01:55,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:02:20,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:02:47,994 WARN L227 SmtUtils]: Spent 8.99s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:03:05,544 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse4 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse2)) (.cse3 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse2))) (let ((.cse0 (fp.add c_currentRoundingMode .cse3 .cse2)) (.cse1 (fp.sub c_currentRoundingMode .cse4 .cse2))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse2) (fp.sub c_currentRoundingMode .cse1 .cse2)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse3 .cse4)))))) is different from true [2021-11-25 20:03:27,979 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse4)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse4) (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse5 .cse6))))))) is different from false [2021-11-25 20:03:30,007 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse4)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse4) (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse5 .cse6))))))) is different from true [2021-11-25 20:03:52,539 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5)) (.cse7 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5))) (let ((.cse0 (fp.add c_currentRoundingMode .cse7 .cse5)) (.cse1 (fp.sub c_currentRoundingMode .cse8 .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6)) (not (fp.lt .cse7 .cse8)))))))) is different from false [2021-11-25 20:03:54,572 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5)) (.cse7 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5))) (let ((.cse0 (fp.add c_currentRoundingMode .cse7 .cse5)) (.cse1 (fp.sub c_currentRoundingMode .cse8 .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6)) (not (fp.lt .cse7 .cse8)))))))) is different from true [2021-11-25 20:04:17,192 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse3) .cse3)) (.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse3) .cse3))) (let ((.cse5 (fp.add c_currentRoundingMode .cse0 .cse3)) (.cse6 (fp.sub c_currentRoundingMode .cse1 .cse3))) (let ((.cse8 (fp.sub c_currentRoundingMode .cse6 .cse3)) (.cse7 (fp.add c_currentRoundingMode .cse5 .cse3))) (let ((.cse2 (fp.add c_currentRoundingMode .cse7 .cse3)) (.cse4 (fp.sub c_currentRoundingMode .cse8 .cse3))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse3) (fp.sub c_currentRoundingMode .cse4 .cse3)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)) (not (fp.lt .cse2 .cse4)))))))) is different from false [2021-11-25 20:04:19,230 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse3) .cse3)) (.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse3) .cse3))) (let ((.cse5 (fp.add c_currentRoundingMode .cse0 .cse3)) (.cse6 (fp.sub c_currentRoundingMode .cse1 .cse3))) (let ((.cse8 (fp.sub c_currentRoundingMode .cse6 .cse3)) (.cse7 (fp.add c_currentRoundingMode .cse5 .cse3))) (let ((.cse2 (fp.add c_currentRoundingMode .cse7 .cse3)) (.cse4 (fp.sub c_currentRoundingMode .cse8 .cse3))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse3) (fp.sub c_currentRoundingMode .cse4 .cse3)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)) (not (fp.lt .cse2 .cse4)))))))) is different from true [2021-11-25 20:04:41,953 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse8 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse8) .cse8) .cse8)) (.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse8) .cse8) .cse8))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse8)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse8))) (let ((.cse7 (fp.sub c_currentRoundingMode .cse3 .cse8)) (.cse6 (fp.add c_currentRoundingMode .cse2 .cse8))) (let ((.cse4 (fp.add c_currentRoundingMode .cse6 .cse8)) (.cse5 (fp.sub c_currentRoundingMode .cse7 .cse8))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (not (fp.lt .cse6 .cse7)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse8) (fp.sub c_currentRoundingMode .cse5 .cse8)))))))) is different from false [2021-11-25 20:04:43,996 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse8 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse8) .cse8) .cse8)) (.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse8) .cse8) .cse8))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse8)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse8))) (let ((.cse7 (fp.sub c_currentRoundingMode .cse3 .cse8)) (.cse6 (fp.add c_currentRoundingMode .cse2 .cse8))) (let ((.cse4 (fp.add c_currentRoundingMode .cse6 .cse8)) (.cse5 (fp.sub c_currentRoundingMode .cse7 .cse8))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (not (fp.lt .cse6 .cse7)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse8) (fp.sub c_currentRoundingMode .cse5 .cse8)))))))) is different from true [2021-11-25 20:05:06,814 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse8 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse3 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse8) .cse8) .cse8) .cse8)) (.cse2 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse8) .cse8) .cse8) .cse8))) (let ((.cse6 (fp.add c_currentRoundingMode .cse2 .cse8)) (.cse7 (fp.sub c_currentRoundingMode .cse3 .cse8))) (let ((.cse5 (fp.sub c_currentRoundingMode .cse7 .cse8)) (.cse4 (fp.add c_currentRoundingMode .cse6 .cse8))) (let ((.cse0 (fp.add c_currentRoundingMode .cse4 .cse8)) (.cse1 (fp.sub c_currentRoundingMode .cse5 .cse8))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (not (fp.lt .cse6 .cse7)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse8) (fp.sub c_currentRoundingMode .cse1 .cse8)))))))) is different from false [2021-11-25 20:05:08,862 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse8 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse3 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse8) .cse8) .cse8) .cse8)) (.cse2 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse8) .cse8) .cse8) .cse8))) (let ((.cse6 (fp.add c_currentRoundingMode .cse2 .cse8)) (.cse7 (fp.sub c_currentRoundingMode .cse3 .cse8))) (let ((.cse5 (fp.sub c_currentRoundingMode .cse7 .cse8)) (.cse4 (fp.add c_currentRoundingMode .cse6 .cse8))) (let ((.cse0 (fp.add c_currentRoundingMode .cse4 .cse8)) (.cse1 (fp.sub c_currentRoundingMode .cse5 .cse8))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (not (fp.lt .cse6 .cse7)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse8) (fp.sub c_currentRoundingMode .cse1 .cse8)))))))) is different from true [2021-11-25 20:05:31,839 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4) .cse4) .cse4) .cse4) .cse4)) (.cse7 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4) .cse4) .cse4) .cse4) .cse4))) (let ((.cse5 (fp.add c_currentRoundingMode .cse7 .cse4)) (.cse6 (fp.sub c_currentRoundingMode .cse8 .cse4))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse2 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse4)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse4) (fp.sub c_currentRoundingMode .cse1 .cse4)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)))))))) is different from false [2021-11-25 20:05:33,894 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4) .cse4) .cse4) .cse4) .cse4)) (.cse7 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4) .cse4) .cse4) .cse4) .cse4))) (let ((.cse5 (fp.add c_currentRoundingMode .cse7 .cse4)) (.cse6 (fp.sub c_currentRoundingMode .cse8 .cse4))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse2 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse4)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse4) (fp.sub c_currentRoundingMode .cse1 .cse4)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)))))))) is different from true [2021-11-25 20:05:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 42 not checked. [2021-11-25 20:05:33,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 20:05:33,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584264164] [2021-11-25 20:05:33,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584264164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:05:33,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [977790522] [2021-11-25 20:05:33,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:05:33,917 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 20:05:33,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 20:05:33,934 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 20:05:33,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-25 20:05:35,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 20:05:35,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:05:35,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 20:05:35,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:05:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:05:35,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:06:15,200 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse4)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse4) (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.lt .cse5 .cse6))))))) is different from false [2021-11-25 20:06:17,227 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse4)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse4) (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.lt .cse5 .cse6))))))) is different from true [2021-11-25 20:06:35,669 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5) .cse5)) (.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5) .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6))))))) is different from false [2021-11-25 20:06:37,702 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5) .cse5)) (.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5) .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6))))))) is different from true [2021-11-25 20:06:56,211 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse3 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse1) .cse1) .cse1)) (.cse4 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse1) .cse1) .cse1))) (let ((.cse6 (fp.sub c_currentRoundingMode .cse4 .cse1)) (.cse5 (fp.add c_currentRoundingMode .cse3 .cse1))) (let ((.cse0 (fp.add c_currentRoundingMode .cse5 .cse1)) (.cse2 (fp.sub c_currentRoundingMode .cse6 .cse1))) (or (fp.lt (fp.add c_currentRoundingMode .cse0 .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1)) (not (fp.lt .cse3 .cse4)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse0 .cse2))))))) is different from false [2021-11-25 20:06:58,249 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse3 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse1) .cse1) .cse1)) (.cse4 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse1) .cse1) .cse1))) (let ((.cse6 (fp.sub c_currentRoundingMode .cse4 .cse1)) (.cse5 (fp.add c_currentRoundingMode .cse3 .cse1))) (let ((.cse0 (fp.add c_currentRoundingMode .cse5 .cse1)) (.cse2 (fp.sub c_currentRoundingMode .cse6 .cse1))) (or (fp.lt (fp.add c_currentRoundingMode .cse0 .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1)) (not (fp.lt .cse3 .cse4)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse0 .cse2))))))) is different from true [2021-11-25 20:07:16,895 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse6) .cse6) .cse6) .cse6)) (.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse6) .cse6) .cse6) .cse6))) (let ((.cse5 (fp.sub c_currentRoundingMode .cse1 .cse6)) (.cse4 (fp.add c_currentRoundingMode .cse0 .cse6))) (let ((.cse2 (fp.add c_currentRoundingMode .cse4 .cse6)) (.cse3 (fp.sub c_currentRoundingMode .cse5 .cse6))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse6) (fp.sub c_currentRoundingMode .cse3 .cse6))))))) is different from false [2021-11-25 20:07:18,938 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse6 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse6) .cse6) .cse6) .cse6)) (.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse6) .cse6) .cse6) .cse6))) (let ((.cse5 (fp.sub c_currentRoundingMode .cse1 .cse6)) (.cse4 (fp.add c_currentRoundingMode .cse0 .cse6))) (let ((.cse2 (fp.add c_currentRoundingMode .cse4 .cse6)) (.cse3 (fp.sub c_currentRoundingMode .cse5 .cse6))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse6) (fp.sub c_currentRoundingMode .cse3 .cse6))))))) is different from true [2021-11-25 20:07:37,639 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse4 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse6) .cse6) .cse6) .cse6) .cse6)) (.cse5 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse6) .cse6) .cse6) .cse6) .cse6))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse5 .cse6)) (.cse2 (fp.add c_currentRoundingMode .cse4 .cse6))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse6)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse6))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse6) (fp.sub c_currentRoundingMode .cse1 .cse6))))))) is different from false [2021-11-25 20:07:39,692 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse6 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse4 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse6) .cse6) .cse6) .cse6) .cse6)) (.cse5 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse6) .cse6) .cse6) .cse6) .cse6))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse5 .cse6)) (.cse2 (fp.add c_currentRoundingMode .cse4 .cse6))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse6)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse6))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse6) (fp.sub c_currentRoundingMode .cse1 .cse6))))))) is different from true [2021-11-25 20:07:58,473 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4) .cse4) .cse4) .cse4) .cse4) .cse4)) (.cse6 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4) .cse4) .cse4) .cse4) .cse4) .cse4))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse2 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse4)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse4) (fp.sub c_currentRoundingMode .cse1 .cse4)) (not (fp.lt .cse5 .cse6))))))) is different from false [2021-11-25 20:08:00,534 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4) .cse4) .cse4) .cse4) .cse4) .cse4)) (.cse6 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4) .cse4) .cse4) .cse4) .cse4) .cse4))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse2 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse4)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse4) (fp.sub c_currentRoundingMode .cse1 .cse4)) (not (fp.lt .cse5 .cse6))))))) is different from true [2021-11-25 20:08:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 42 not checked. [2021-11-25 20:08:00,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [977790522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:08:00,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997776384] [2021-11-25 20:08:00,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:08:00,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:08:00,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:08:00,565 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:08:00,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49575633-e745-4e18-aae6-9ce2ac73f043/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:08:27,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 20:08:27,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:08:27,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 20:08:27,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:08:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:08:27,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:09:39,843 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5)) (.cse7 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5))) (let ((.cse0 (fp.add c_currentRoundingMode .cse7 .cse5)) (.cse1 (fp.sub c_currentRoundingMode .cse8 .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse7 .cse8)))))))) is different from false [2021-11-25 20:09:41,886 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5)) (.cse7 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5))) (let ((.cse0 (fp.add c_currentRoundingMode .cse7 .cse5)) (.cse1 (fp.sub c_currentRoundingMode .cse8 .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse7 .cse8)))))))) is different from true [2021-11-25 20:10:12,946 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse9 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse3)) (.cse10 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse3))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse10 .cse3)) (.cse0 (fp.add c_currentRoundingMode .cse9 .cse3))) (let ((.cse5 (fp.add c_currentRoundingMode .cse0 .cse3)) (.cse6 (fp.sub c_currentRoundingMode .cse1 .cse3))) (let ((.cse8 (fp.sub c_currentRoundingMode .cse6 .cse3)) (.cse7 (fp.add c_currentRoundingMode .cse5 .cse3))) (let ((.cse2 (fp.add c_currentRoundingMode .cse7 .cse3)) (.cse4 (fp.sub c_currentRoundingMode .cse8 .cse3))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse3) (fp.sub c_currentRoundingMode .cse4 .cse3)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse2 .cse4)) (not (fp.lt .cse9 .cse10))))))))) is different from false [2021-11-25 20:10:14,995 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse9 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse3)) (.cse10 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse3))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse10 .cse3)) (.cse0 (fp.add c_currentRoundingMode .cse9 .cse3))) (let ((.cse5 (fp.add c_currentRoundingMode .cse0 .cse3)) (.cse6 (fp.sub c_currentRoundingMode .cse1 .cse3))) (let ((.cse8 (fp.sub c_currentRoundingMode .cse6 .cse3)) (.cse7 (fp.add c_currentRoundingMode .cse5 .cse3))) (let ((.cse2 (fp.add c_currentRoundingMode .cse7 .cse3)) (.cse4 (fp.sub c_currentRoundingMode .cse8 .cse3))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse3) (fp.sub c_currentRoundingMode .cse4 .cse3)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse2 .cse4)) (not (fp.lt .cse9 .cse10))))))))) is different from true [2021-11-25 20:10:50,399 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse12 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse11 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse12)) (.cse10 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse12))) (let ((.cse0 (fp.add c_currentRoundingMode .cse10 .cse12)) (.cse1 (fp.sub c_currentRoundingMode .cse11 .cse12))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse12)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse12))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse12)) (.cse5 (fp.sub c_currentRoundingMode .cse3 .cse12))) (let ((.cse9 (fp.sub c_currentRoundingMode .cse5 .cse12)) (.cse8 (fp.add c_currentRoundingMode .cse4 .cse12))) (let ((.cse6 (fp.add c_currentRoundingMode .cse8 .cse12)) (.cse7 (fp.sub c_currentRoundingMode .cse9 .cse12))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (not (fp.lt .cse6 .cse7)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse8 .cse9)) (not (fp.lt .cse10 .cse11)) (fp.lt (fp.add c_currentRoundingMode .cse6 .cse12) (fp.sub c_currentRoundingMode .cse7 .cse12)))))))))) is different from false [2021-11-25 20:10:52,457 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse12 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse11 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse12)) (.cse10 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse12))) (let ((.cse0 (fp.add c_currentRoundingMode .cse10 .cse12)) (.cse1 (fp.sub c_currentRoundingMode .cse11 .cse12))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse12)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse12))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse12)) (.cse5 (fp.sub c_currentRoundingMode .cse3 .cse12))) (let ((.cse9 (fp.sub c_currentRoundingMode .cse5 .cse12)) (.cse8 (fp.add c_currentRoundingMode .cse4 .cse12))) (let ((.cse6 (fp.add c_currentRoundingMode .cse8 .cse12)) (.cse7 (fp.sub c_currentRoundingMode .cse9 .cse12))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (not (fp.lt .cse6 .cse7)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse8 .cse9)) (not (fp.lt .cse10 .cse11)) (fp.lt (fp.add c_currentRoundingMode .cse6 .cse12) (fp.sub c_currentRoundingMode .cse7 .cse12)))))))))) is different from true