./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs --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 ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:53:56,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:53:56,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:53:56,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:53:56,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:53:56,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:53:56,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:53:56,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:53:56,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:53:56,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:53:56,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:53:56,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:53:56,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:53:56,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:53:56,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:53:56,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:53:56,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:53:56,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:53:56,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:53:56,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:53:56,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:53:56,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:53:56,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:53:56,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:53:56,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:53:56,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:53:56,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:53:56,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:53:56,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:53:56,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:53:56,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:53:56,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:53:56,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:53:56,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:53:56,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:53:56,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:53:56,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:53:56,479 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:53:56,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:53:56,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:53:56,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:53:56,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:53:56,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:53:56,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:53:56,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:53:56,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:53:56,534 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:53:56,534 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:53:56,534 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:53:56,535 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:53:56,535 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:53:56,535 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:53:56,536 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:53:56,537 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:53:56,537 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:53:56,537 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:53:56,537 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:53:56,538 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:53:56,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:53:56,539 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:53:56,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:53:56,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:53:56,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:53:56,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:53:56,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:53:56,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:53:56,540 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:53:56,541 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:53:56,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:53:56,541 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:53:56,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:53:56,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:53:56,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:53:56,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:53:56,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:53:56,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:53:56,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:53:56,545 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:53:56,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:53:56,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:53:56,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:53:56,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:53:56,546 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_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 [2021-11-19 14:53:56,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:53:56,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:53:56,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:53:56,913 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:53:56,914 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:53:56,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-11-19 14:53:56,978 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/data/3d6e4337e/9200447647ae4acca9aa2207a6551d8f/FLAGe04a1ab10 [2021-11-19 14:53:57,446 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:53:57,447 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-11-19 14:53:57,453 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/data/3d6e4337e/9200447647ae4acca9aa2207a6551d8f/FLAGe04a1ab10 [2021-11-19 14:53:57,835 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/data/3d6e4337e/9200447647ae4acca9aa2207a6551d8f [2021-11-19 14:53:57,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:53:57,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:53:57,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:53:57,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:53:57,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:53:57,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:53:57" (1/1) ... [2021-11-19 14:53:57,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29abb331 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:57, skipping insertion in model container [2021-11-19 14:53:57,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:53:57" (1/1) ... [2021-11-19 14:53:57,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:53:57,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:53:58,023 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_d73ada2e-89e1-4396-8f9f-45fb18c974c2/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-11-19 14:53:58,026 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:53:58,034 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:53:58,048 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_d73ada2e-89e1-4396-8f9f-45fb18c974c2/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-11-19 14:53:58,049 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:53:58,062 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:53:58,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58 WrapperNode [2021-11-19 14:53:58,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:53:58,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:53:58,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:53:58,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:53:58,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58" (1/1) ... [2021-11-19 14:53:58,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58" (1/1) ... [2021-11-19 14:53:58,096 INFO L137 Inliner]: procedures = 12, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2021-11-19 14:53:58,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:53:58,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:53:58,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:53:58,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:53:58,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58" (1/1) ... [2021-11-19 14:53:58,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58" (1/1) ... [2021-11-19 14:53:58,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58" (1/1) ... [2021-11-19 14:53:58,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58" (1/1) ... [2021-11-19 14:53:58,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58" (1/1) ... [2021-11-19 14:53:58,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58" (1/1) ... [2021-11-19 14:53:58,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58" (1/1) ... [2021-11-19 14:53:58,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:53:58,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:53:58,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:53:58,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:53:58,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58" (1/1) ... [2021-11-19 14:53:58,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:53:58,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:53:58,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:53:58,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:53:58,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:53:58,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:53:58,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:53:58,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:53:58,274 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:53:58,276 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:53:58,359 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:53:58,369 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:53:58,369 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:53:58,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:53:58 BoogieIcfgContainer [2021-11-19 14:53:58,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:53:58,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:53:58,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:53:58,379 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:53:58,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:53:57" (1/3) ... [2021-11-19 14:53:58,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17403b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:53:58, skipping insertion in model container [2021-11-19 14:53:58,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:53:58" (2/3) ... [2021-11-19 14:53:58,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17403b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:53:58, skipping insertion in model container [2021-11-19 14:53:58,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:53:58" (3/3) ... [2021-11-19 14:53:58,382 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2021-11-19 14:53:58,388 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:53:58,388 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:53:58,437 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:53:58,445 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 [2021-11-19 14:53:58,446 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:53:58,460 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) [2021-11-19 14:53:58,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-19 14:53:58,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:53:58,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-19 14:53:58,470 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:53:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:53:58,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1497591, now seen corresponding path program 1 times [2021-11-19 14:53:58,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:53:58,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524060441] [2021-11-19 14:53:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:58,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:53:58,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:53:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:53:58,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:53:58,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524060441] [2021-11-19 14:53:58,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524060441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:53:58,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:53:58,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:53:58,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390899660] [2021-11-19 14:53:58,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:53:58,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:53:58,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:53:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:53:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:53:58,683 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:53:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:53:58,709 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-11-19 14:53:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:53:58,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-19 14:53:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:53:58,721 INFO L225 Difference]: With dead ends: 13 [2021-11-19 14:53:58,721 INFO L226 Difference]: Without dead ends: 6 [2021-11-19 14:53:58,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:53:58,729 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:53:58,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:53:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-11-19 14:53:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-11-19 14:53:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:53:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-11-19 14:53:58,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-11-19 14:53:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:53:58,765 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-11-19 14:53:58,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:53:58,766 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-11-19 14:53:58,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-19 14:53:58,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:53:58,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-19 14:53:58,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:53:58,767 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:53:58,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:53:58,769 INFO L85 PathProgramCache]: Analyzing trace with hash 46362837, now seen corresponding path program 1 times [2021-11-19 14:53:58,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:53:58,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278280603] [2021-11-19 14:53:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:58,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:53:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:53:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:53:58,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:53:58,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278280603] [2021-11-19 14:53:58,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278280603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:53:58,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623695511] [2021-11-19 14:53:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:58,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:53:58,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:53:58,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:53:58,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:53:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:53:58,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:53:58,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:53:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:53:59,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:53:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:53:59,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623695511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:53:59,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867280735] [2021-11-19 14:53:59,157 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-19 14:53:59,157 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:53:59,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:53:59,168 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:53:59,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:53:59,218 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size [2021-11-19 14:53:59,232 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-11-19 14:53:59,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:53:59,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:53:59,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:53:59,399 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:53:59,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-19 14:53:59,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:53:59,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:53:59,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:53:59,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:53:59,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:53:59,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:53:59,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:53:59,485 INFO L180 QuantifierPusher]: treesize reduction 24, result has 53.8 percent of original size [2021-11-19 14:53:59,492 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-19 14:53:59,506 INFO L180 QuantifierPusher]: treesize reduction 28, result has 55.6 percent of original size [2021-11-19 14:53:59,516 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 14:53:59,523 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:53:59,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:53:59,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:53:59,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-11-19 14:53:59,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091590322] [2021-11-19 14:53:59,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:53:59,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:53:59,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:53:59,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:53:59,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:53:59,717 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) [2021-11-19 14:53:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:53:59,741 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-11-19 14:53:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:53:59,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) Word has length 5 [2021-11-19 14:53:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:53:59,742 INFO L225 Difference]: With dead ends: 12 [2021-11-19 14:53:59,743 INFO L226 Difference]: Without dead ends: 9 [2021-11-19 14:53:59,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:53:59,748 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:53:59,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:53:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-19 14:53:59,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-19 14:53:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:53:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-19 14:53:59,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-11-19 14:53:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:53:59,761 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-19 14:53:59,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 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) [2021-11-19 14:53:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-19 14:53:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 14:53:59,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:53:59,763 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-11-19 14:53:59,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:53:59,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:53:59,977 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:53:59,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:53:59,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1846238857, now seen corresponding path program 2 times [2021-11-19 14:53:59,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:53:59,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842149245] [2021-11-19 14:53:59,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:53:59,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:54:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:54:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:00,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:54:00,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842149245] [2021-11-19 14:54:00,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842149245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:54:00,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912710581] [2021-11-19 14:54:00,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 14:54:00,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:54:00,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:54:00,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:54:00,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:54:00,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 14:54:00,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:54:00,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:54:00,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:54:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:00,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:54:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:00,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912710581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:54:00,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1088961242] [2021-11-19 14:54:00,274 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-19 14:54:00,274 INFO L166 IcfgInterpreter]: Building call graph [2021-11-19 14:54:00,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-19 14:54:00,275 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-19 14:54:00,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-19 14:54:00,282 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.3 percent of original size [2021-11-19 14:54:00,286 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-11-19 14:54:00,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:54:00,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:54:00,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:54:00,337 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:54:00,347 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-19 14:54:00,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:54:00,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:54:00,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:54:00,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:54:00,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:54:00,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:54:00,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-11-19 14:54:00,391 INFO L180 QuantifierPusher]: treesize reduction 24, result has 53.8 percent of original size [2021-11-19 14:54:00,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-19 14:54:00,399 INFO L180 QuantifierPusher]: treesize reduction 28, result has 55.6 percent of original size [2021-11-19 14:54:00,403 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-19 14:54:00,406 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-19 14:54:00,529 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 14:54:00,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 14:54:00,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-19 14:54:00,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051317327] [2021-11-19 14:54:00,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 14:54:00,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:54:00,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:54:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:54:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:54:00,533 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-11-19 14:54:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:54:00,563 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-19 14:54:00,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 14:54:00,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 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 8 [2021-11-19 14:54:00,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:54:00,565 INFO L225 Difference]: With dead ends: 18 [2021-11-19 14:54:00,565 INFO L226 Difference]: Without dead ends: 15 [2021-11-19 14:54:00,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:54:00,567 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:54:00,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:54:00,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-19 14:54:00,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-19 14:54:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:54:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-19 14:54:00,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-11-19 14:54:00,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:54:00,573 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-19 14:54:00,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-11-19 14:54:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-19 14:54:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 14:54:00,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:54:00,575 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2021-11-19 14:54:00,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:54:00,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 14:54:00,794 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:54:00,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:54:00,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1249756343, now seen corresponding path program 3 times [2021-11-19 14:54:00,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:54:00,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46196942] [2021-11-19 14:54:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:54:00,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:54:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:54:00,811 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:54:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:54:00,841 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 14:54:00,842 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:54:00,843 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 14:54:00,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 14:54:00,850 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1] [2021-11-19 14:54:00,855 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:54:00,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:54:00 BoogieIcfgContainer [2021-11-19 14:54:00,879 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:54:00,880 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:54:00,880 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:54:00,880 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:54:00,881 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:53:58" (3/4) ... [2021-11-19 14:54:00,885 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 14:54:00,885 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:54:00,886 INFO L158 Benchmark]: Toolchain (without parser) took 3047.13ms. Allocated memory was 79.7MB in the beginning and 117.4MB in the end (delta: 37.7MB). Free memory was 44.3MB in the beginning and 83.5MB in the end (delta: -39.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:54:00,886 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 79.7MB. Free memory was 60.4MB in the beginning and 60.3MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:54:00,887 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.47ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 44.1MB in the beginning and 73.5MB in the end (delta: -29.4MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. [2021-11-19 14:54:00,887 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.03ms. Allocated memory is still 96.5MB. Free memory was 73.5MB in the beginning and 72.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:54:00,888 INFO L158 Benchmark]: Boogie Preprocessor took 18.35ms. Allocated memory is still 96.5MB. Free memory was 72.1MB in the beginning and 71.2MB in the end (delta: 838.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:54:00,888 INFO L158 Benchmark]: RCFGBuilder took 255.16ms. Allocated memory is still 96.5MB. Free memory was 71.0MB in the beginning and 62.4MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:54:00,889 INFO L158 Benchmark]: TraceAbstraction took 2505.94ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 61.9MB in the beginning and 83.5MB in the end (delta: -21.6MB). Peak memory consumption was 499.9kB. Max. memory is 16.1GB. [2021-11-19 14:54:00,889 INFO L158 Benchmark]: Witness Printer took 5.09ms. Allocated memory is still 117.4MB. Free memory is still 83.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:54:00,892 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 79.7MB. Free memory was 60.4MB in the beginning and 60.3MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.47ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 44.1MB in the beginning and 73.5MB in the end (delta: -29.4MB). Peak memory consumption was 7.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.03ms. Allocated memory is still 96.5MB. Free memory was 73.5MB in the beginning and 72.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.35ms. Allocated memory is still 96.5MB. Free memory was 72.1MB in the beginning and 71.2MB in the end (delta: 838.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 255.16ms. Allocated memory is still 96.5MB. Free memory was 71.0MB in the beginning and 62.4MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 2505.94ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 61.9MB in the beginning and 83.5MB in the end (delta: -21.6MB). Peak memory consumption was 499.9kB. Max. memory is 16.1GB. * Witness Printer took 5.09ms. Allocated memory is still 117.4MB. Free memory is still 83.5MB. 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: 29]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 24, overapproximation of someBinaryArithmeticFLOAToperation at line 16. Possible FailurePath: [L1] int __return_main; [L9] float main__tick = 0.10000000149011612; [L10] float main__time = 0.0; [L11] int main__i; [L12] main__i = 0 VAL [__return_main=0, main__i=0, main__tick=2500000037252903/25000000000000000, main__time=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=1, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=2, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=3, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=4, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=5, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=6, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=7, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=8, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=9, main__tick=2500000037252903/25000000000000000] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L14] COND FALSE !(main__i < 10) [L23] int __tmp_1; [L24] __tmp_1 = main__time != 1.0 [L25] int __VERIFIER_assert__cond; [L26] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L27] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] [L29] reach_error() VAL [__return_main=0, __tmp_1=0, __VERIFIER_assert__cond=0, main__i=10, main__tick=2500000037252903/25000000000000000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 23 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 14 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 29 IncrementalHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 10 mSDtfsCounter, 29 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 80 SizeOfPredicates, 0 NumberOfNonLiveVariables, 97 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 [2021-11-19 14:54:00,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs --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 ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:54:03,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:54:03,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:54:03,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:54:03,710 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:54:03,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:54:03,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:54:03,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:54:03,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:54:03,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:54:03,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:54:03,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:54:03,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:54:03,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:54:03,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:54:03,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:54:03,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:54:03,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:54:03,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:54:03,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:54:03,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:54:03,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:54:03,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:54:03,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:54:03,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:54:03,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:54:03,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:54:03,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:54:03,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:54:03,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:54:03,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:54:03,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:54:03,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:54:03,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:54:03,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:54:03,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:54:03,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:54:03,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:54:03,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:54:03,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:54:03,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:54:03,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:54:03,845 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:54:03,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:54:03,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:54:03,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:54:03,847 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:54:03,847 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:54:03,848 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:54:03,848 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:54:03,848 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:54:03,849 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:54:03,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:54:03,850 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:54:03,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:54:03,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:54:03,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:54:03,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:54:03,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:54:03,852 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:54:03,852 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:54:03,852 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:54:03,853 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:54:03,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:54:03,853 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:54:03,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:54:03,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:54:03,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:54:03,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:54:03,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:54:03,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:54:03,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:54:03,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:54:03,856 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:54:03,856 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:54:03,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:54:03,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:54:03,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:54:03,857 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_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ee159be1ed42c29b70080447b490f7a1aeb72331afc90e5794e0e8d61cb20d74 [2021-11-19 14:54:04,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:54:04,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:54:04,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:54:04,374 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:54:04,377 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:54:04,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-11-19 14:54:04,443 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/data/893cd7917/74a3b0133e96451cbd5a76f96cf074da/FLAG2c321eac5 [2021-11-19 14:54:05,030 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:54:05,032 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2021-11-19 14:54:05,039 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/data/893cd7917/74a3b0133e96451cbd5a76f96cf074da/FLAG2c321eac5 [2021-11-19 14:54:05,386 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/data/893cd7917/74a3b0133e96451cbd5a76f96cf074da [2021-11-19 14:54:05,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:54:05,392 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:54:05,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:54:05,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:54:05,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:54:05,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75dd5e07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05, skipping insertion in model container [2021-11-19 14:54:05,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:54:05,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:54:05,649 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_d73ada2e-89e1-4396-8f9f-45fb18c974c2/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-11-19 14:54:05,659 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:54:05,675 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:54:05,697 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_d73ada2e-89e1-4396-8f9f-45fb18c974c2/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c[721,734] [2021-11-19 14:54:05,699 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:54:05,721 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:54:05,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05 WrapperNode [2021-11-19 14:54:05,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:54:05,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:54:05,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:54:05,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:54:05,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,832 INFO L137 Inliner]: procedures = 13, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 31 [2021-11-19 14:54:05,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:54:05,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:54:05,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:54:05,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:54:05,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:54:05,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:54:05,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:54:05,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:54:05,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05" (1/1) ... [2021-11-19 14:54:05,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:54:05,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:54:05,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:54:05,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:54:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:54:05,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:54:05,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:54:05,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:54:06,048 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:54:06,050 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:54:06,307 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:54:06,313 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:54:06,314 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 14:54:06,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:54:06 BoogieIcfgContainer [2021-11-19 14:54:06,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:54:06,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:54:06,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:54:06,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:54:06,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:54:05" (1/3) ... [2021-11-19 14:54:06,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbf1fa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:54:06, skipping insertion in model container [2021-11-19 14:54:06,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:54:05" (2/3) ... [2021-11-19 14:54:06,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbf1fa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:54:06, skipping insertion in model container [2021-11-19 14:54:06,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:54:06" (3/3) ... [2021-11-19 14:54:06,342 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2021-11-19 14:54:06,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:54:06,349 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:54:06,429 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:54:06,447 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 [2021-11-19 14:54:06,456 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:54:06,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:54:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-19 14:54:06,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:54:06,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-19 14:54:06,510 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:54:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:54:06,516 INFO L85 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2021-11-19 14:54:06,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:54:06,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18818456] [2021-11-19 14:54:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:54:06,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:54:06,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:54:06,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:54:06,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:54:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:54:06,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:54:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:54:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:06,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:54:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:06,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:54:06,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18818456] [2021-11-19 14:54:06,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18818456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:54:06,845 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:54:06,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:54:06,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552309243] [2021-11-19 14:54:06,848 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:54:06,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:54:06,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:54:06,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:54:06,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:54:06,891 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:54:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:54:07,114 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-11-19 14:54:07,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:54:07,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-19 14:54:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:54:07,131 INFO L225 Difference]: With dead ends: 17 [2021-11-19 14:54:07,131 INFO L226 Difference]: Without dead ends: 8 [2021-11-19 14:54:07,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:54:07,139 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:54:07,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:54:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-19 14:54:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-19 14:54:07,176 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) [2021-11-19 14:54:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-19 14:54:07,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2021-11-19 14:54:07,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:54:07,179 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-19 14:54:07,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:54:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-19 14:54:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 14:54:07,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:54:07,181 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-19 14:54:07,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:54:07,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:54:07,394 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:54:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:54:07,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1805796550, now seen corresponding path program 1 times [2021-11-19 14:54:07,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:54:07,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331168888] [2021-11-19 14:54:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:54:07,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:54:07,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:54:07,399 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:54:07,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:54:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:54:07,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:54:07,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:54:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:07,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:54:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:07,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:54:07,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331168888] [2021-11-19 14:54:07,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331168888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:54:07,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1839252952] [2021-11-19 14:54:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:54:07,710 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:54:07,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:54:07,716 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:54:07,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-19 14:54:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:54:08,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:54:08,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:54:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:08,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:54:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:08,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1839252952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:54:08,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617841233] [2021-11-19 14:54:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:54:08,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:54:08,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:54:08,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:54:08,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:54:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:54:08,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:54:08,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:54:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:08,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:54:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:08,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617841233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:54:08,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:54:08,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-19 14:54:08,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951977730] [2021-11-19 14:54:08,309 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:54:08,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:54:08,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:54:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:54:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:54:08,312 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2021-11-19 14:54:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:54:08,901 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2021-11-19 14:54:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:54:08,905 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 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) Word has length 7 [2021-11-19 14:54:08,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:54:08,906 INFO L225 Difference]: With dead ends: 15 [2021-11-19 14:54:08,906 INFO L226 Difference]: Without dead ends: 12 [2021-11-19 14:54:08,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:54:08,909 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:54:08,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:54:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-19 14:54:08,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-19 14:54:08,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:54:08,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-19 14:54:08,916 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 7 [2021-11-19 14:54:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:54:08,917 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-19 14:54:08,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2021-11-19 14:54:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-19 14:54:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 14:54:08,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:54:08,919 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2021-11-19 14:54:08,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-19 14:54:09,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 14:54:09,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-19 14:54:09,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:54:09,531 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:54:09,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:54:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash 555748550, now seen corresponding path program 2 times [2021-11-19 14:54:09,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:54:09,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827420348] [2021-11-19 14:54:09,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:54:09,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:54:09,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:54:09,535 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:54:09,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:54:09,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:54:09,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:54:09,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:54:09,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:54:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:54:32,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:55:00,419 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 14:55:07,259 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 14:56:04,436 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 14:56:11,573 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0))) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 14:56:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-19 14:56:11,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:56:11,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827420348] [2021-11-19 14:56:11,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827420348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:56:11,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2074519771] [2021-11-19 14:56:11,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:56:11,575 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:56:11,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:56:11,579 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:56:11,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-19 14:56:12,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:56:12,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:56:12,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:56:12,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:56:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:56:17,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:56:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 3 times theorem prover too weak. 0 trivial. 15 not checked. [2021-11-19 14:56:39,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2074519771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:56:39,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021360574] [2021-11-19 14:56:39,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 14:56:39,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:56:39,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:56:39,506 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:56:39,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 14:56:39,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 14:56:39,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 14:56:39,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:56:39,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:07,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:33,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:33,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021360574] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:57:33,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:57:33,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 34 [2021-11-19 14:57:33,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759558164] [2021-11-19 14:57:33,257 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:57:33,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 14:57:33,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 14:57:33,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=717, Unknown=28, NotChecked=236, Total=1122 [2021-11-19 14:57:33,264 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 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) [2021-11-19 14:57:36,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:57:40,862 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:57:45,023 WARN L860 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__time~0#1|) (= |c_ULTIMATE.start_main_~main__i~0#1| (_ bv0 32)) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-19 14:57:47,057 WARN L860 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~main__i~0#1| (_ bv1 32))) is different from true [2021-11-19 14:57:49,095 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) (.cse1 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse0) .cse1)) (= (_ bv2 32) |c_ULTIMATE.start_main_~main__i~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~main__tick~0#1|)) .cse1)) (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))) is different from true [2021-11-19 14:58:00,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:58:02,476 WARN L860 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= (_ bv4 32) |c_ULTIMATE.start_main_~main__i~0#1|) (= c_currentRoundingMode roundNearestTiesToEven) (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|)) is different from true [2021-11-19 14:58:19,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:58:21,606 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|))) (let ((.cse1 (fp.add c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~main__tick~0#1|)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= (_ bv6 32) |c_ULTIMATE.start_main_~main__i~0#1|) (= (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0)) |c_ULTIMATE.start_main_~main__time~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) .cse2)) (= c_currentRoundingMode roundNearestTiesToEven) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse1) .cse2)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse3) .cse2))))) is different from false [2021-11-19 14:58:23,648 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|))) (let ((.cse1 (fp.add c_currentRoundingMode .cse3 |c_ULTIMATE.start_main_~main__tick~0#1|)) (.cse2 ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (and (= (_ bv6 32) |c_ULTIMATE.start_main_~main__i~0#1|) (= (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0)) |c_ULTIMATE.start_main_~main__time~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) .cse2)) (= c_currentRoundingMode roundNearestTiesToEven) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse1) .cse2)) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode .cse3) .cse2))))) is different from true [2021-11-19 14:59:43,562 WARN L227 SmtUtils]: Spent 34.76s on a formula simplification. DAG size of input: 27 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 14:59:46,119 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:59:48,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 14:59:50,134 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:23,461 WARN L227 SmtUtils]: Spent 9.49s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:00:24,894 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:26,525 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:29,229 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:46,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:48,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:50,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:52,550 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:54,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:56,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:00:59,814 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:01:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:01:06,491 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-11-19 15:01:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 15:01:06,492 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 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 11 [2021-11-19 15:01:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:01:06,493 INFO L225 Difference]: With dead ends: 21 [2021-11-19 15:01:06,493 INFO L226 Difference]: Without dead ends: 17 [2021-11-19 15:01:06,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 324.6s TimeCoverageRelationStatistics Valid=210, Invalid=1027, Unknown=59, NotChecked=684, Total=1980 [2021-11-19 15:01:06,500 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 40.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:01:06,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 46 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 11 Unknown, 37 Unchecked, 40.1s Time] [2021-11-19 15:01:06,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-19 15:01:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-19 15:01:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:01:06,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-19 15:01:06,508 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2021-11-19 15:01:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:01:06,508 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-19 15:01:06,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 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) [2021-11-19 15:01:06,509 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-19 15:01:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 15:01:06,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:01:06,510 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1] [2021-11-19 15:01:06,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-19 15:01:06,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 15:01:06,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:01:07,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:01:07,117 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:01:07,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:01:07,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2092945382, now seen corresponding path program 3 times [2021-11-19 15:01:07,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:01:07,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090295650] [2021-11-19 15:01:07,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:01:07,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:01:07,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:01:07,120 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:01:07,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:01:07,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 15:01:07,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:01:07,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:01:07,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:01:49,046 WARN L227 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:02:13,619 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:02:46,003 WARN L227 SmtUtils]: Spent 7.66s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:03:18,255 WARN L227 SmtUtils]: Spent 7.75s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:03:24,260 WARN L860 $PredicateComparison]: unable to prove that (and (= (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0)) |c_ULTIMATE.start_main_~main__time~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-19 15:03:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 34 refuted. 21 times theorem prover too weak. 0 trivial. 11 not checked. [2021-11-19 15:03:24,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:03:51,754 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 15:03:59,123 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 15:04:06,122 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) 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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 15:04:12,059 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 15:04:16,461 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-19 15:04:18,498 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 15:04:24,638 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-19 15:04:26,680 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 15:04:32,827 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-19 15:04:34,875 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 15:04:41,035 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-19 15:04:43,092 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 15:04:49,261 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-19 15:04:51,313 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 15:04:57,471 WARN L838 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0))) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from false [2021-11-19 15:04:59,521 WARN L860 $PredicateComparison]: unable to prove that (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0))) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) is different from true [2021-11-19 15:04:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 63 not checked. [2021-11-19 15:04:59,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:04:59,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090295650] [2021-11-19 15:04:59,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090295650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:04:59,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [382144619] [2021-11-19 15:04:59,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:04:59,523 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:04:59,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:04:59,524 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:04:59,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 15:05:00,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 15:05:00,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:05:00,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:05:00,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:05:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 34 refuted. 21 times theorem prover too weak. 0 trivial. 11 not checked. [2021-11-19 15:05:34,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:06:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 63 not checked. [2021-11-19 15:06:13,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [382144619] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:06:13,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590684607] [2021-11-19 15:06:13,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 15:06:13,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:06:13,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:06:13,186 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:06:13,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d73ada2e-89e1-4396-8f9f-45fb18c974c2/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 15:06:16,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 15:06:16,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:06:16,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 15:06:16,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:06:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:06:40,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:07:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:07:06,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590684607] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:07:06,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 15:07:06,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 13, 14] total 53 [2021-11-19 15:07:06,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841418496] [2021-11-19 15:07:06,678 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 15:07:06,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-19 15:07:06,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:07:06,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-19 15:07:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1454, Unknown=43, NotChecked=990, Total=2756 [2021-11-19 15:07:06,682 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 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) [2021-11-19 15:07:08,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:07:11,437 WARN L860 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))))) (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0) .cse0))) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-19 15:07:13,507 WARN L860 $PredicateComparison]: unable to prove that (and (= ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__time~0#1|) (= |c_ULTIMATE.start_main_~main__i~0#1| (_ bv0 32)) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-19 15:07:15,569 WARN L860 $PredicateComparison]: unable to prove that (and (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= c_currentRoundingMode roundNearestTiesToEven) (= |c_ULTIMATE.start_main_~main__i~0#1| (_ bv1 32))) is different from true [2021-11-19 15:07:17,631 WARN L860 $PredicateComparison]: unable to prove that (and (= (_ bv2 32) |c_ULTIMATE.start_main_~main__i~0#1|) (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-19 15:07:19,682 WARN L860 $PredicateComparison]: unable to prove that (and (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= (_ bv3 32) |c_ULTIMATE.start_main_~main__i~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (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_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-19 15:07:21,727 WARN L860 $PredicateComparison]: unable to prove that (and (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= (_ bv4 32) |c_ULTIMATE.start_main_~main__i~0#1|) (= c_currentRoundingMode roundNearestTiesToEven) (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|)) is different from true [2021-11-19 15:07:40,207 WARN L227 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 32 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:08:11,684 WARN L227 SmtUtils]: Spent 19.75s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:08:13,034 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:08:14,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-19 15:08:17,317 WARN L860 $PredicateComparison]: unable to prove that (and (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= (_ bv7 32) |c_ULTIMATE.start_main_~main__i~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-11-19 15:08:19,389 WARN L860 $PredicateComparison]: unable to prove that (and (= (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode (_ +zero 11 53)) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__time~0#1|) (not (fp.eq ((_ to_fp 11 53) c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~main__time~0#1| |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|) |c_ULTIMATE.start_main_~main__tick~0#1|)) ((_ to_fp 11 53) c_currentRoundingMode 1.0))) (= (_ bv8 32) |c_ULTIMATE.start_main_~main__i~0#1|) (= ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (/ 2500000037252903.0 25000000000000000.0))) |c_ULTIMATE.start_main_~main__tick~0#1|) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true