./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/loop-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/loop-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:29:37,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:29:37,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:29:37,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:29:37,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:29:37,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:29:37,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:29:37,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:29:37,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:29:37,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:29:37,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:29:37,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:29:37,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:29:37,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:29:37,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:29:37,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:29:37,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:29:37,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:29:37,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:29:37,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:29:37,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:29:37,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:29:37,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:29:37,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:29:37,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:29:37,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:29:37,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:29:37,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:29:37,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:29:37,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:29:37,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:29:37,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:29:37,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:29:37,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:29:37,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:29:37,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:29:37,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:29:37,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:29:37,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:29:37,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:29:37,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:29:37,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:29:37,523 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:29:37,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:29:37,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:29:37,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:29:37,525 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:29:37,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:29:37,526 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:29:37,526 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:29:37,532 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:29:37,532 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:29:37,533 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:29:37,534 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:29:37,534 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:29:37,534 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:29:37,534 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:29:37,535 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:29:37,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:29:37,535 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:29:37,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:29:37,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:29:37,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:29:37,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:29:37,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:29:37,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:29:37,537 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:29:37,537 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:29:37,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:29:37,537 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:29:37,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:29:37,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:29:37,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:29:37,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:29:37,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:29:37,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:29:37,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:29:37,540 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:29:37,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:29:37,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:29:37,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:29:37,541 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:29:37,541 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_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b [2021-11-12 23:29:37,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:29:37,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:29:37,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:29:37,828 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:29:37,828 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:29:37,830 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/float-benchs/loop-1.c [2021-11-12 23:29:37,909 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/data/195a1ae54/b26c2b79ffdd4ed7b28ae712eaba19ff/FLAG2ad4b7733 [2021-11-12 23:29:38,332 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:29:38,333 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/sv-benchmarks/c/float-benchs/loop-1.c [2021-11-12 23:29:38,337 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/data/195a1ae54/b26c2b79ffdd4ed7b28ae712eaba19ff/FLAG2ad4b7733 [2021-11-12 23:29:38,757 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/data/195a1ae54/b26c2b79ffdd4ed7b28ae712eaba19ff [2021-11-12 23:29:38,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:29:38,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:29:38,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:29:38,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:29:38,782 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:29:38,783 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:29:38" (1/1) ... [2021-11-12 23:29:38,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eaf1f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:38, skipping insertion in model container [2021-11-12 23:29:38,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:29:38" (1/1) ... [2021-11-12 23:29:38,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:29:38,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:29:38,988 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2021-11-12 23:29:39,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:29:39,013 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:29:39,032 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2021-11-12 23:29:39,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:29:39,048 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:29:39,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39 WrapperNode [2021-11-12 23:29:39,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:29:39,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:29:39,050 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:29:39,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:29:39,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39" (1/1) ... [2021-11-12 23:29:39,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39" (1/1) ... [2021-11-12 23:29:39,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:29:39,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:29:39,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:29:39,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:29:39,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39" (1/1) ... [2021-11-12 23:29:39,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39" (1/1) ... [2021-11-12 23:29:39,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39" (1/1) ... [2021-11-12 23:29:39,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39" (1/1) ... [2021-11-12 23:29:39,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39" (1/1) ... [2021-11-12 23:29:39,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39" (1/1) ... [2021-11-12 23:29:39,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39" (1/1) ... [2021-11-12 23:29:39,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:29:39,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:29:39,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:29:39,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:29:39,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39" (1/1) ... [2021-11-12 23:29:39,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:29:39,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:29:39,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:29:39,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:29:39,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:29:39,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:29:39,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:29:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:29:39,409 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:29:39,409 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:29:39,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:29:39 BoogieIcfgContainer [2021-11-12 23:29:39,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:29:39,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:29:39,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:29:39,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:29:39,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:29:38" (1/3) ... [2021-11-12 23:29:39,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c0d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:29:39, skipping insertion in model container [2021-11-12 23:29:39,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:39" (2/3) ... [2021-11-12 23:29:39,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c0d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:29:39, skipping insertion in model container [2021-11-12 23:29:39,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:29:39" (3/3) ... [2021-11-12 23:29:39,429 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-1.c [2021-11-12 23:29:39,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:29:39,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:29:39,480 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:29:39,487 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:29:39,487 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:29:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:29:39,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:39,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:29:39,505 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:39,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:39,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1880294, now seen corresponding path program 1 times [2021-11-12 23:29:39,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:29:39,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119745798] [2021-11-12 23:29:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:39,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:29:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:29:39,616 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:29:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:29:39,661 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 23:29:39,666 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:29:39,667 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:29:39,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:29:39,675 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-12 23:29:39,678 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:29:39,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:29:39 BoogieIcfgContainer [2021-11-12 23:29:39,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:29:39,709 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:29:39,709 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:29:39,709 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:29:39,710 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:29:39" (3/4) ... [2021-11-12 23:29:39,713 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:29:39,713 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:29:39,715 INFO L158 Benchmark]: Toolchain (without parser) took 953.80ms. Allocated memory is still 100.7MB. Free memory was 58.0MB in the beginning and 49.4MB in the end (delta: 8.6MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2021-11-12 23:29:39,716 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory was 74.6MB in the beginning and 74.5MB in the end (delta: 45.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:29:39,717 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.01ms. Allocated memory is still 100.7MB. Free memory was 57.8MB in the beginning and 75.3MB in the end (delta: -17.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-12 23:29:39,718 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.48ms. Allocated memory is still 100.7MB. Free memory was 75.3MB in the beginning and 73.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:29:39,719 INFO L158 Benchmark]: Boogie Preprocessor took 32.73ms. Allocated memory is still 100.7MB. Free memory was 73.8MB in the beginning and 72.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:29:39,724 INFO L158 Benchmark]: RCFGBuilder took 294.30ms. Allocated memory is still 100.7MB. Free memory was 72.7MB in the beginning and 63.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:29:39,724 INFO L158 Benchmark]: TraceAbstraction took 291.94ms. Allocated memory is still 100.7MB. Free memory was 62.8MB in the beginning and 49.7MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:29:39,726 INFO L158 Benchmark]: Witness Printer took 4.68ms. Allocated memory is still 100.7MB. Free memory was 49.7MB in the beginning and 49.4MB in the end (delta: 264.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:29:39,734 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 100.7MB. Free memory was 74.6MB in the beginning and 74.5MB in the end (delta: 45.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.01ms. Allocated memory is still 100.7MB. Free memory was 57.8MB in the beginning and 75.3MB in the end (delta: -17.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.48ms. Allocated memory is still 100.7MB. Free memory was 75.3MB in the beginning and 73.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.73ms. Allocated memory is still 100.7MB. Free memory was 73.8MB in the beginning and 72.7MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 294.30ms. Allocated memory is still 100.7MB. Free memory was 72.7MB in the beginning and 63.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 291.94ms. Allocated memory is still 100.7MB. Free memory was 62.8MB in the beginning and 49.7MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 4.68ms. Allocated memory is still 100.7MB. Free memory was 49.7MB in the beginning and 49.4MB in the end (delta: 264.7kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 4]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 14, overapproximation of someBinaryDOUBLEComparisonOperation at line 20. Possible FailurePath: [L8] float x, y, z; [L10] x = 1.f [L11] y = 1e7 [L12] z = 42.f VAL [x=1, y=10000000, z=42] [L14] COND FALSE !(x < y) [L20] CALL __VERIFIER_assert(z >= 0.f && z <= 1e8) [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 23:29:39,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/loop-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:29:42,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:29:42,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:29:42,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:29:42,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:29:42,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:29:42,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:29:42,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:29:42,256 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:29:42,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:29:42,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:29:42,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:29:42,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:29:42,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:29:42,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:29:42,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:29:42,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:29:42,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:29:42,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:29:42,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:29:42,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:29:42,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:29:42,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:29:42,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:29:42,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:29:42,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:29:42,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:29:42,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:29:42,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:29:42,310 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:29:42,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:29:42,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:29:42,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:29:42,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:29:42,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:29:42,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:29:42,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:29:42,318 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:29:42,318 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:29:42,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:29:42,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:29:42,321 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:29:42,361 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:29:42,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:29:42,363 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:29:42,363 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:29:42,363 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:29:42,363 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:29:42,364 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:29:42,364 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:29:42,364 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:29:42,365 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:29:42,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:29:42,367 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:29:42,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:29:42,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:29:42,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:29:42,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:29:42,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:29:42,369 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:29:42,369 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:29:42,369 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:29:42,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:29:42,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:29:42,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:29:42,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:29:42,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:29:42,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:29:42,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:29:42,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:29:42,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:29:42,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:29:42,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:29:42,373 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:29:42,373 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:42,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:29:42,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:29:42,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:29:42,375 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_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b [2021-11-12 23:29:42,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:29:42,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:29:42,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:29:42,805 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:29:42,808 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:29:42,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/float-benchs/loop-1.c [2021-11-12 23:29:42,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/data/1212e4794/6aa4cf639fa3439bb468390b91a7d34a/FLAG9f183ef16 [2021-11-12 23:29:43,405 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:29:43,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/sv-benchmarks/c/float-benchs/loop-1.c [2021-11-12 23:29:43,411 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/data/1212e4794/6aa4cf639fa3439bb468390b91a7d34a/FLAG9f183ef16 [2021-11-12 23:29:43,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/data/1212e4794/6aa4cf639fa3439bb468390b91a7d34a [2021-11-12 23:29:43,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:29:43,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:29:43,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:29:43,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:29:43,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:29:43,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:29:43" (1/1) ... [2021-11-12 23:29:43,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d90f37d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:43, skipping insertion in model container [2021-11-12 23:29:43,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:29:43" (1/1) ... [2021-11-12 23:29:43,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:29:43,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:29:43,968 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2021-11-12 23:29:43,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:29:44,001 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:29:44,018 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/sv-benchmarks/c/float-benchs/loop-1.c[311,324] [2021-11-12 23:29:44,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:29:44,042 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:29:44,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44 WrapperNode [2021-11-12 23:29:44,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:29:44,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:29:44,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:29:44,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:29:44,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44" (1/1) ... [2021-11-12 23:29:44,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44" (1/1) ... [2021-11-12 23:29:44,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:29:44,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:29:44,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:29:44,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:29:44,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44" (1/1) ... [2021-11-12 23:29:44,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44" (1/1) ... [2021-11-12 23:29:44,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44" (1/1) ... [2021-11-12 23:29:44,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44" (1/1) ... [2021-11-12 23:29:44,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44" (1/1) ... [2021-11-12 23:29:44,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44" (1/1) ... [2021-11-12 23:29:44,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44" (1/1) ... [2021-11-12 23:29:44,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:29:44,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:29:44,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:29:44,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:29:44,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44" (1/1) ... [2021-11-12 23:29:44,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:29:44,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:29:44,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:29:44,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:29:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:29:44,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:29:44,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:29:44,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:29:44,984 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:29:44,984 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:29:44,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:29:44 BoogieIcfgContainer [2021-11-12 23:29:44,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:29:44,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:29:44,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:29:44,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:29:44,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:29:43" (1/3) ... [2021-11-12 23:29:44,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e8ac4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:29:44, skipping insertion in model container [2021-11-12 23:29:44,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:29:44" (2/3) ... [2021-11-12 23:29:44,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24e8ac4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:29:44, skipping insertion in model container [2021-11-12 23:29:44,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:29:44" (3/3) ... [2021-11-12 23:29:44,994 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-1.c [2021-11-12 23:29:44,999 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:29:44,999 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:29:45,037 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:29:45,044 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:29:45,045 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:29:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 23:29:45,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:45,082 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 23:29:45,083 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-11-12 23:29:45,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:45,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184776971] [2021-11-12 23:29:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:45,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:45,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:45,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:45,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:29:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:29:45,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:45,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:45,389 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:45,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184776971] [2021-11-12 23:29:45,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184776971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:29:45,392 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:29:45,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 23:29:45,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561661073] [2021-11-12 23:29:45,395 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:29:45,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:29:45,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:45,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:29:45,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:29:45,440 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:29:45,466 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-12 23:29:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:29:45,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 6 [2021-11-12 23:29:45,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:29:45,476 INFO L225 Difference]: With dead ends: 20 [2021-11-12 23:29:45,476 INFO L226 Difference]: Without dead ends: 8 [2021-11-12 23:29:45,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:29:45,486 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 4.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:29:45,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 2 Unknown, 0 Unchecked, 0.56ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 1 Unchecked, 4.16ms Time] [2021-11-12 23:29:45,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-12 23:29:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-12 23:29:45,517 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) [2021-11-12 23:29:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-12 23:29:45,519 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-12 23:29:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:29:45,519 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-12 23:29:45,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:29:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-12 23:29:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-12 23:29:45,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:29:45,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:29:45,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-12 23:29:45,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:29:45,737 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:29:45,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:29:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-11-12 23:29:45,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:29:45,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773604548] [2021-11-12 23:29:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:45,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:29:45,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:29:45,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:29:45,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:29:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:29:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:46,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:49,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:29:49,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773604548] [2021-11-12 23:29:49,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773604548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:49,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2002911830] [2021-11-12 23:29:49,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:49,667 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:29:49,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:29:49,668 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:29:49,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-12 23:29:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:49,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:29:49,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:50,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:50,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2002911830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:50,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315001883] [2021-11-12 23:29:50,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:29:50,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:29:50,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:29:50,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:29:50,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-12 23:29:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:29:50,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:29:50,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:29:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:51,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:29:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:29:59,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315001883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:29:59,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:29:59,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 14 [2021-11-12 23:29:59,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639793446] [2021-11-12 23:29:59,599 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:29:59,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:29:59,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:29:59,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:29:59,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=141, Unknown=1, NotChecked=0, Total=182 [2021-11-12 23:29:59,602 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:30:22,164 WARN L227 SmtUtils]: Spent 14.27s on a formula simplification. DAG size of input: 23 DAG size of output: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:30:23,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:25,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:31,613 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:33,625 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:55,661 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:57,677 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:30:59,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:31:13,655 WARN L227 SmtUtils]: Spent 10.48s on a formula simplification. DAG size of input: 20 DAG size of output: 17 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:31:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:31:15,067 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2021-11-12 23:31:15,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:31:15,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-12 23:31:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:31:15,068 INFO L225 Difference]: With dead ends: 18 [2021-11-12 23:31:15,068 INFO L226 Difference]: Without dead ends: 12 [2021-11-12 23:31:15,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 69.2s TimeCoverageRelationStatistics Valid=104, Invalid=309, Unknown=7, NotChecked=0, Total=420 [2021-11-12 23:31:15,071 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17141.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17334.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:31:15,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 56 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 4 Unknown, 0 Unchecked, 17334.51ms Time] [2021-11-12 23:31:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-12 23:31:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-12 23:31:15,075 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) [2021-11-12 23:31:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-12 23:31:15,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 7 [2021-11-12 23:31:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:31:15,076 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-12 23:31:15,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:31:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-12 23:31:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-12 23:31:15,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:31:15,077 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2021-11-12 23:31:15,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2021-11-12 23:31:15,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:15,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:31:15,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:31:15,680 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:31:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:31:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 2 times [2021-11-12 23:31:15,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:31:15,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120324888] [2021-11-12 23:31:15,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:31:15,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:31:15,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:31:15,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:31:15,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:31:16,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:31:16,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:31:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:18,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:31:41,090 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (fp.lt (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0) .cse0) .cse0) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse0) .cse0) .cse0))) is different from false [2021-11-12 23:31:46,980 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (fp.lt (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0) .cse0) .cse0) .cse0) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse0) .cse0) .cse0) .cse0))) is different from false [2021-11-12 23:31:49,007 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (fp.lt (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0) .cse0) .cse0) .cse0) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse0) .cse0) .cse0) .cse0))) is different from true [2021-11-12 23:31:55,097 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (fp.lt (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0) .cse0) .cse0) .cse0) .cse0) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse0) .cse0) .cse0) .cse0) .cse0))) is different from false [2021-11-12 23:31:57,124 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (fp.lt (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0) .cse0) .cse0) .cse0) .cse0) (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse0) .cse0) .cse0) .cse0) .cse0))) is different from true [2021-11-12 23:31:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-11-12 23:31:57,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:31:57,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120324888] [2021-11-12 23:31:57,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120324888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:31:57,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [419601140] [2021-11-12 23:31:57,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:31:57,135 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:31:57,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:31:57,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:31:57,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 23:31:57,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:31:57,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:31:57,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:31:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:31:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:31:57,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:09,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-11-12 23:32:09,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [419601140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:32:09,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813789845] [2021-11-12 23:32:09,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:32:09,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:32:09,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:32:09,130 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:32:09,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 23:32:13,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:32:13,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:32:13,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 23:32:13,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:32:13,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:32:13,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:32:44,932 WARN L227 SmtUtils]: Spent 9.78s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:33:02,606 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse4 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse2)) (.cse3 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse2))) (let ((.cse0 (fp.add c_currentRoundingMode .cse3 .cse2)) (.cse1 (fp.sub c_currentRoundingMode .cse4 .cse2))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse2) (fp.sub c_currentRoundingMode .cse1 .cse2)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse3 .cse4)))))) is different from true [2021-11-12 23:33:24,441 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse4)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse4) (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse5 .cse6))))))) is different from false [2021-11-12 23:33:26,468 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse4)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse4) (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse5 .cse6))))))) is different from true [2021-11-12 23:33:53,121 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5)) (.cse7 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5))) (let ((.cse0 (fp.add c_currentRoundingMode .cse7 .cse5)) (.cse1 (fp.sub c_currentRoundingMode .cse8 .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse7 .cse8)))))))) is different from false [2021-11-12 23:33:55,156 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5)) (.cse7 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5))) (let ((.cse0 (fp.add c_currentRoundingMode .cse7 .cse5)) (.cse1 (fp.sub c_currentRoundingMode .cse8 .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse7 .cse8)))))))) is different from true [2021-11-12 23:33:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 12 not checked. [2021-11-12 23:33:55,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813789845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:33:55,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:33:55,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-12 23:33:55,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27495190] [2021-11-12 23:33:55,183 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:33:55,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 23:33:55,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:33:55,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 23:33:55,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=117, Unknown=15, NotChecked=174, Total=380 [2021-11-12 23:33:55,188 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:33:59,648 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:05,957 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse6 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse0)) (.cse7 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse0))) (let ((.cse2 (fp.sub c_currentRoundingMode .cse7 .cse0)) (.cse1 (fp.add c_currentRoundingMode .cse6 .cse0))) (let ((.cse3 (fp.add c_currentRoundingMode .cse1 .cse0)) (.cse4 (fp.sub c_currentRoundingMode .cse2 .cse0))) (let ((.cse5 (fp.lt (fp.add c_currentRoundingMode .cse3 .cse0) (fp.sub c_currentRoundingMode .cse4 .cse0)))) (and (= (fp.add c_currentRoundingMode .cse0 .cse0) |c_ULTIMATE.start_main_~x~0#1|) (or (not (fp.lt .cse1 .cse2)) (not (fp.lt .cse3 .cse4)) .cse5 (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse6 .cse7))) .cse5 (= (fp.sub c_currentRoundingMode ((_ to_fp 8 24) c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode 10000000.0)) .cse0) |c_ULTIMATE.start_main_~y~0#1|) (= c_currentRoundingMode roundNearestTiesToEven))))))) is different from true [2021-11-12 23:34:31,330 WARN L227 SmtUtils]: Spent 9.93s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:34:33,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:35,379 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:43,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:45,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:47,347 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:52,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:34:54,627 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:28,900 WARN L227 SmtUtils]: Spent 27.14s on a formula simplification. DAG size of input: 19 DAG size of output: 18 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:35:30,530 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:32,549 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:33,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:33,574 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-12 23:35:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:35:33,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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 [2021-11-12 23:35:33,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:33,598 INFO L225 Difference]: With dead ends: 20 [2021-11-12 23:35:33,598 INFO L226 Difference]: Without dead ends: 16 [2021-11-12 23:35:33,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 137.1s TimeCoverageRelationStatistics Valid=136, Invalid=218, Unknown=16, NotChecked=280, Total=650 [2021-11-12 23:35:33,600 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 18 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26675.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.96ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 27078.59ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:33,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 15 Invalid, 142 Unknown, 0 Unchecked, 1.96ms Time], IncrementalHoareTripleChecker [18 Valid, 54 Invalid, 7 Unknown, 63 Unchecked, 27078.59ms Time] [2021-11-12 23:35:33,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-12 23:35:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-12 23:35:33,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:35:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-11-12 23:35:33,605 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2021-11-12 23:35:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:33,605 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-11-12 23:35:33,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:35:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-11-12 23:35:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-12 23:35:33,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:33,606 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:33,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:33,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-12 23:35:34,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:34,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:34,207 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:34,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:34,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 3 times [2021-11-12 23:35:34,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:34,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35813500] [2021-11-12 23:35:34,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:35:34,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:34,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:34,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:34,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:35:35,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-12 23:35:35,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:35:35,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 23:35:35,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:36:00,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:29,124 WARN L227 SmtUtils]: Spent 7.65s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:36:46,834 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse2 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse4 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse2)) (.cse3 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse2))) (let ((.cse0 (fp.add c_currentRoundingMode .cse3 .cse2)) (.cse1 (fp.sub c_currentRoundingMode .cse4 .cse2))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse2) (fp.sub c_currentRoundingMode .cse1 .cse2)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse3 .cse4)))))) is different from true [2021-11-12 23:37:08,929 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse4)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse4) (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse5 .cse6))))))) is different from false [2021-11-12 23:37:10,968 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse4)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse4) (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse5 .cse6))))))) is different from true [2021-11-12 23:37:33,687 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5)) (.cse7 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5))) (let ((.cse0 (fp.add c_currentRoundingMode .cse7 .cse5)) (.cse1 (fp.sub c_currentRoundingMode .cse8 .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6)) (not (fp.lt .cse7 .cse8)))))))) is different from false [2021-11-12 23:37:35,728 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5)) (.cse7 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5))) (let ((.cse0 (fp.add c_currentRoundingMode .cse7 .cse5)) (.cse1 (fp.sub c_currentRoundingMode .cse8 .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6)) (not (fp.lt .cse7 .cse8)))))))) is different from true [2021-11-12 23:37:58,474 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse3) .cse3)) (.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse3) .cse3))) (let ((.cse5 (fp.add c_currentRoundingMode .cse0 .cse3)) (.cse6 (fp.sub c_currentRoundingMode .cse1 .cse3))) (let ((.cse8 (fp.sub c_currentRoundingMode .cse6 .cse3)) (.cse7 (fp.add c_currentRoundingMode .cse5 .cse3))) (let ((.cse2 (fp.add c_currentRoundingMode .cse7 .cse3)) (.cse4 (fp.sub c_currentRoundingMode .cse8 .cse3))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse3) (fp.sub c_currentRoundingMode .cse4 .cse3)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)) (not (fp.lt .cse2 .cse4)))))))) is different from false [2021-11-12 23:38:00,524 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse3) .cse3)) (.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse3) .cse3))) (let ((.cse5 (fp.add c_currentRoundingMode .cse0 .cse3)) (.cse6 (fp.sub c_currentRoundingMode .cse1 .cse3))) (let ((.cse8 (fp.sub c_currentRoundingMode .cse6 .cse3)) (.cse7 (fp.add c_currentRoundingMode .cse5 .cse3))) (let ((.cse2 (fp.add c_currentRoundingMode .cse7 .cse3)) (.cse4 (fp.sub c_currentRoundingMode .cse8 .cse3))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse3) (fp.sub c_currentRoundingMode .cse4 .cse3)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)) (not (fp.lt .cse2 .cse4)))))))) is different from true [2021-11-12 23:38:23,384 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse8 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse8) .cse8) .cse8)) (.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse8) .cse8) .cse8))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse8)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse8))) (let ((.cse7 (fp.sub c_currentRoundingMode .cse3 .cse8)) (.cse6 (fp.add c_currentRoundingMode .cse2 .cse8))) (let ((.cse4 (fp.add c_currentRoundingMode .cse6 .cse8)) (.cse5 (fp.sub c_currentRoundingMode .cse7 .cse8))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (not (fp.lt .cse6 .cse7)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse8) (fp.sub c_currentRoundingMode .cse5 .cse8)))))))) is different from false [2021-11-12 23:38:25,438 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse8 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse8) .cse8) .cse8)) (.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse8) .cse8) .cse8))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse8)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse8))) (let ((.cse7 (fp.sub c_currentRoundingMode .cse3 .cse8)) (.cse6 (fp.add c_currentRoundingMode .cse2 .cse8))) (let ((.cse4 (fp.add c_currentRoundingMode .cse6 .cse8)) (.cse5 (fp.sub c_currentRoundingMode .cse7 .cse8))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (not (fp.lt .cse6 .cse7)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse8) (fp.sub c_currentRoundingMode .cse5 .cse8)))))))) is different from true [2021-11-12 23:38:48,351 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse8 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse3 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse8) .cse8) .cse8) .cse8)) (.cse2 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse8) .cse8) .cse8) .cse8))) (let ((.cse6 (fp.add c_currentRoundingMode .cse2 .cse8)) (.cse7 (fp.sub c_currentRoundingMode .cse3 .cse8))) (let ((.cse5 (fp.sub c_currentRoundingMode .cse7 .cse8)) (.cse4 (fp.add c_currentRoundingMode .cse6 .cse8))) (let ((.cse0 (fp.add c_currentRoundingMode .cse4 .cse8)) (.cse1 (fp.sub c_currentRoundingMode .cse5 .cse8))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (not (fp.lt .cse6 .cse7)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse8) (fp.sub c_currentRoundingMode .cse1 .cse8)))))))) is different from false [2021-11-12 23:38:50,411 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse8 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse3 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse8) .cse8) .cse8) .cse8)) (.cse2 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse8) .cse8) .cse8) .cse8))) (let ((.cse6 (fp.add c_currentRoundingMode .cse2 .cse8)) (.cse7 (fp.sub c_currentRoundingMode .cse3 .cse8))) (let ((.cse5 (fp.sub c_currentRoundingMode .cse7 .cse8)) (.cse4 (fp.add c_currentRoundingMode .cse6 .cse8))) (let ((.cse0 (fp.add c_currentRoundingMode .cse4 .cse8)) (.cse1 (fp.sub c_currentRoundingMode .cse5 .cse8))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (not (fp.lt .cse6 .cse7)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse8) (fp.sub c_currentRoundingMode .cse1 .cse8)))))))) is different from true [2021-11-12 23:39:13,446 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4) .cse4) .cse4) .cse4) .cse4)) (.cse7 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4) .cse4) .cse4) .cse4) .cse4))) (let ((.cse5 (fp.add c_currentRoundingMode .cse7 .cse4)) (.cse6 (fp.sub c_currentRoundingMode .cse8 .cse4))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse2 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse4)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse4) (fp.sub c_currentRoundingMode .cse1 .cse4)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)))))))) is different from false [2021-11-12 23:39:15,513 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4) .cse4) .cse4) .cse4) .cse4)) (.cse7 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4) .cse4) .cse4) .cse4) .cse4))) (let ((.cse5 (fp.add c_currentRoundingMode .cse7 .cse4)) (.cse6 (fp.sub c_currentRoundingMode .cse8 .cse4))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse2 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse4)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse4) (fp.sub c_currentRoundingMode .cse1 .cse4)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)))))))) is different from true [2021-11-12 23:39:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 42 not checked. [2021-11-12 23:39:15,543 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:15,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35813500] [2021-11-12 23:39:15,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35813500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:39:15,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463643220] [2021-11-12 23:39:15,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:39:15,544 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:39:15,558 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:39:15,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 23:39:17,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-12 23:39:17,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:39:17,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 23:39:17,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:39:17,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:59,089 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse4)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse4) (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.lt .cse5 .cse6))))))) is different from false [2021-11-12 23:40:01,124 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4)) (.cse6 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse0 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse2 (fp.add c_currentRoundingMode .cse0 .cse4)) (.cse3 (fp.sub c_currentRoundingMode .cse1 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse4) (fp.sub c_currentRoundingMode .cse3 .cse4)) (not (fp.lt .cse5 .cse6))))))) is different from true [2021-11-12 23:40:19,642 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5) .cse5)) (.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5) .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6))))))) is different from false [2021-11-12 23:40:21,681 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5) .cse5)) (.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5) .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6))))))) is different from true [2021-11-12 23:40:40,312 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse3 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse1) .cse1) .cse1)) (.cse4 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse1) .cse1) .cse1))) (let ((.cse6 (fp.sub c_currentRoundingMode .cse4 .cse1)) (.cse5 (fp.add c_currentRoundingMode .cse3 .cse1))) (let ((.cse0 (fp.add c_currentRoundingMode .cse5 .cse1)) (.cse2 (fp.sub c_currentRoundingMode .cse6 .cse1))) (or (fp.lt (fp.add c_currentRoundingMode .cse0 .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1)) (not (fp.lt .cse3 .cse4)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse0 .cse2))))))) is different from false [2021-11-12 23:40:42,360 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse3 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse1) .cse1) .cse1)) (.cse4 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse1) .cse1) .cse1))) (let ((.cse6 (fp.sub c_currentRoundingMode .cse4 .cse1)) (.cse5 (fp.add c_currentRoundingMode .cse3 .cse1))) (let ((.cse0 (fp.add c_currentRoundingMode .cse5 .cse1)) (.cse2 (fp.sub c_currentRoundingMode .cse6 .cse1))) (or (fp.lt (fp.add c_currentRoundingMode .cse0 .cse1) (fp.sub c_currentRoundingMode .cse2 .cse1)) (not (fp.lt .cse3 .cse4)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse0 .cse2))))))) is different from true [2021-11-12 23:41:01,090 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse6) .cse6) .cse6) .cse6)) (.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse6) .cse6) .cse6) .cse6))) (let ((.cse5 (fp.sub c_currentRoundingMode .cse1 .cse6)) (.cse4 (fp.add c_currentRoundingMode .cse0 .cse6))) (let ((.cse2 (fp.add c_currentRoundingMode .cse4 .cse6)) (.cse3 (fp.sub c_currentRoundingMode .cse5 .cse6))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse6) (fp.sub c_currentRoundingMode .cse3 .cse6))))))) is different from false [2021-11-12 23:41:03,148 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse6 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse0 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse6) .cse6) .cse6) .cse6)) (.cse1 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse6) .cse6) .cse6) .cse6))) (let ((.cse5 (fp.sub c_currentRoundingMode .cse1 .cse6)) (.cse4 (fp.add c_currentRoundingMode .cse0 .cse6))) (let ((.cse2 (fp.add c_currentRoundingMode .cse4 .cse6)) (.cse3 (fp.sub c_currentRoundingMode .cse5 .cse6))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse6) (fp.sub c_currentRoundingMode .cse3 .cse6))))))) is different from true [2021-11-12 23:41:22,021 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse4 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse6) .cse6) .cse6) .cse6) .cse6)) (.cse5 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse6) .cse6) .cse6) .cse6) .cse6))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse5 .cse6)) (.cse2 (fp.add c_currentRoundingMode .cse4 .cse6))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse6)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse6))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse6) (fp.sub c_currentRoundingMode .cse1 .cse6))))))) is different from false [2021-11-12 23:41:24,087 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse6 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse4 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse6) .cse6) .cse6) .cse6) .cse6)) (.cse5 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse6) .cse6) .cse6) .cse6) .cse6))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse5 .cse6)) (.cse2 (fp.add c_currentRoundingMode .cse4 .cse6))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse6)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse6))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (not (fp.lt .cse4 .cse5)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse6) (fp.sub c_currentRoundingMode .cse1 .cse6))))))) is different from true [2021-11-12 23:41:43,020 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4) .cse4) .cse4) .cse4) .cse4) .cse4)) (.cse6 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4) .cse4) .cse4) .cse4) .cse4) .cse4))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse2 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse4)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse4) (fp.sub c_currentRoundingMode .cse1 .cse4)) (not (fp.lt .cse5 .cse6))))))) is different from false [2021-11-12 23:41:45,093 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse4 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse5 (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse4) .cse4) .cse4) .cse4) .cse4) .cse4)) (.cse6 (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse4) .cse4) .cse4) .cse4) .cse4) .cse4))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse6 .cse4)) (.cse2 (fp.add c_currentRoundingMode .cse5 .cse4))) (let ((.cse0 (fp.add c_currentRoundingMode .cse2 .cse4)) (.cse1 (fp.sub c_currentRoundingMode .cse3 .cse4))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse0 .cse4) (fp.sub c_currentRoundingMode .cse1 .cse4)) (not (fp.lt .cse5 .cse6))))))) is different from true [2021-11-12 23:41:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 42 not checked. [2021-11-12 23:41:45,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [463643220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:41:45,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159663015] [2021-11-12 23:41:45,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:41:45,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:41:45,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:41:45,130 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:41:45,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_48440d6b-92d6-48ff-96ec-28a318127ae5/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 23:42:12,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-12 23:42:12,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:42:12,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-12 23:42:12,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:12,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:21,205 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5)) (.cse7 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5))) (let ((.cse0 (fp.add c_currentRoundingMode .cse7 .cse5)) (.cse1 (fp.sub c_currentRoundingMode .cse8 .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse7 .cse8)))))))) is different from false [2021-11-12 23:43:23,251 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse5 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse8 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse5)) (.cse7 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse5))) (let ((.cse0 (fp.add c_currentRoundingMode .cse7 .cse5)) (.cse1 (fp.sub c_currentRoundingMode .cse8 .cse5))) (let ((.cse3 (fp.sub c_currentRoundingMode .cse1 .cse5)) (.cse2 (fp.add c_currentRoundingMode .cse0 .cse5))) (let ((.cse4 (fp.add c_currentRoundingMode .cse2 .cse5)) (.cse6 (fp.sub c_currentRoundingMode .cse3 .cse5))) (or (not (fp.lt .cse0 .cse1)) (not (fp.lt .cse2 .cse3)) (fp.lt (fp.add c_currentRoundingMode .cse4 .cse5) (fp.sub c_currentRoundingMode .cse6 .cse5)) (not (fp.lt .cse4 .cse6)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse7 .cse8)))))))) is different from true [2021-11-12 23:43:54,392 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse9 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse3)) (.cse10 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse3))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse10 .cse3)) (.cse0 (fp.add c_currentRoundingMode .cse9 .cse3))) (let ((.cse5 (fp.add c_currentRoundingMode .cse0 .cse3)) (.cse6 (fp.sub c_currentRoundingMode .cse1 .cse3))) (let ((.cse8 (fp.sub c_currentRoundingMode .cse6 .cse3)) (.cse7 (fp.add c_currentRoundingMode .cse5 .cse3))) (let ((.cse2 (fp.add c_currentRoundingMode .cse7 .cse3)) (.cse4 (fp.sub c_currentRoundingMode .cse8 .cse3))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse3) (fp.sub c_currentRoundingMode .cse4 .cse3)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse2 .cse4)) (not (fp.lt .cse9 .cse10))))))))) is different from false [2021-11-12 23:43:56,450 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse3 ((_ to_fp 8 24) c_currentRoundingMode 1.0))) (let ((.cse9 (fp.add c_currentRoundingMode |c_ULTIMATE.start_main_~x~0#1| .cse3)) (.cse10 (fp.sub c_currentRoundingMode |c_ULTIMATE.start_main_~y~0#1| .cse3))) (let ((.cse1 (fp.sub c_currentRoundingMode .cse10 .cse3)) (.cse0 (fp.add c_currentRoundingMode .cse9 .cse3))) (let ((.cse5 (fp.add c_currentRoundingMode .cse0 .cse3)) (.cse6 (fp.sub c_currentRoundingMode .cse1 .cse3))) (let ((.cse8 (fp.sub c_currentRoundingMode .cse6 .cse3)) (.cse7 (fp.add c_currentRoundingMode .cse5 .cse3))) (let ((.cse2 (fp.add c_currentRoundingMode .cse7 .cse3)) (.cse4 (fp.sub c_currentRoundingMode .cse8 .cse3))) (or (not (fp.lt .cse0 .cse1)) (fp.lt (fp.add c_currentRoundingMode .cse2 .cse3) (fp.sub c_currentRoundingMode .cse4 .cse3)) (not (fp.lt .cse5 .cse6)) (not (fp.lt .cse7 .cse8)) (not (fp.lt |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (fp.lt .cse2 .cse4)) (not (fp.lt .cse9 .cse10))))))))) is different from true