./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:36:02,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:36:02,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:36:02,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:36:02,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:36:02,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:36:02,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:36:02,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:36:02,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:36:02,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:36:02,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:36:02,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:36:02,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:36:02,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:36:02,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:36:02,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:36:02,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:36:02,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:36:02,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:36:02,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:36:02,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:36:02,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:36:02,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:36:02,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:36:02,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:36:02,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:36:02,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:36:02,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:36:02,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:36:02,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:36:02,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:36:02,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:36:02,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:36:02,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:36:02,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:36:02,485 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:36:02,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:36:02,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:36:02,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:36:02,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:36:02,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:36:02,490 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:36:02,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:36:02,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:36:02,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:36:02,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:36:02,539 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:36:02,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:36:02,539 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:36:02,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:36:02,540 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:36:02,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:36:02,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:36:02,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:36:02,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:36:02,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:36:02,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:36:02,542 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:36:02,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:36:02,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:36:02,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:36:02,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:36:02,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:36:02,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:36:02,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:36:02,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:36:02,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:36:02,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:36:02,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:36:02,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:36:02,545 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:36:02,545 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:36:02,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:36:02,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:36:02,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 [2021-11-09 10:36:02,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:36:02,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:36:02,979 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:36:02,980 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:36:02,981 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:36:02,983 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-11-09 10:36:03,078 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/data/c2a51aa38/df54a7f3cbed4cca8164a646acce399a/FLAGe557dde7a [2021-11-09 10:36:03,695 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:36:03,696 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-11-09 10:36:03,722 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/data/c2a51aa38/df54a7f3cbed4cca8164a646acce399a/FLAGe557dde7a [2021-11-09 10:36:04,061 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/data/c2a51aa38/df54a7f3cbed4cca8164a646acce399a [2021-11-09 10:36:04,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:36:04,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:36:04,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:36:04,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:36:04,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:36:04,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a6e5a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04, skipping insertion in model container [2021-11-09 10:36:04,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:36:04,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:36:04,320 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_373df763-e55e-4600-aac4-5ab81230755f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-11-09 10:36:04,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:36:04,355 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:36:04,373 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_373df763-e55e-4600-aac4-5ab81230755f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-11-09 10:36:04,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:36:04,402 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:36:04,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04 WrapperNode [2021-11-09 10:36:04,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:36:04,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:36:04,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:36:04,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:36:04,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:36:04,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:36:04,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:36:04,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:36:04,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,477 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:36:04,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:36:04,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:36:04,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:36:04,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04" (1/1) ... [2021-11-09 10:36:04,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:36:04,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:36:04,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:36:04,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:36:04,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:36:04,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:36:04,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:36:04,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:36:04,875 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:36:04,876 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-09 10:36:04,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:36:04 BoogieIcfgContainer [2021-11-09 10:36:04,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:36:04,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:36:04,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:36:04,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:36:04,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:36:04" (1/3) ... [2021-11-09 10:36:04,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1623d4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:36:04, skipping insertion in model container [2021-11-09 10:36:04,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:04" (2/3) ... [2021-11-09 10:36:04,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1623d4da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:36:04, skipping insertion in model container [2021-11-09 10:36:04,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:36:04" (3/3) ... [2021-11-09 10:36:04,893 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-11-09 10:36:04,900 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:36:04,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:36:04,971 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:36:04,984 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=PETRI_NET, 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 [2021-11-09 10:36:04,984 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:36:05,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:36:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-09 10:36:05,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:05,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-09 10:36:05,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:05,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:05,034 INFO L85 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-11-09 10:36:05,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:05,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037448778] [2021-11-09 10:36:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:05,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:36:05,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:36:05,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037448778] [2021-11-09 10:36:05,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037448778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:05,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:36:05,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:36:05,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609142575] [2021-11-09 10:36:05,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:36:05,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:36:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:36:05,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:36:05,307 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:36:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:05,324 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-09 10:36:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:36:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-09 10:36:05,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:05,336 INFO L225 Difference]: With dead ends: 20 [2021-11-09 10:36:05,337 INFO L226 Difference]: Without dead ends: 8 [2021-11-09 10:36:05,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:36:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-09 10:36:05,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-09 10:36:05,375 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) [2021-11-09 10:36:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-09 10:36:05,379 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-09 10:36:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:05,380 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-09 10:36:05,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:36:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-09 10:36:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 10:36:05,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:05,383 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:36:05,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:36:05,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:05,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:05,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2021-11-09 10:36:05,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:36:05,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112896099] [2021-11-09 10:36:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:05,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:36:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:36:05,458 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:36:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:36:05,540 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 10:36:05,541 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-09 10:36:05,543 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:36:05,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:36:05,551 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-09 10:36:05,555 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 10:36:05,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 10:36:05 BoogieIcfgContainer [2021-11-09 10:36:05,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 10:36:05,591 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 10:36:05,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 10:36:05,592 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 10:36:05,593 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:36:04" (3/4) ... [2021-11-09 10:36:05,598 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-09 10:36:05,599 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 10:36:05,603 INFO L168 Benchmark]: Toolchain (without parser) took 1533.93 ms. Allocated memory was 88.1 MB in the beginning and 127.9 MB in the end (delta: 39.8 MB). Free memory was 51.6 MB in the beginning and 69.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 20.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:36:05,604 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory was 67.7 MB in the beginning and 67.6 MB in the end (delta: 55.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:36:05,608 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.10 ms. Allocated memory was 88.1 MB in the beginning and 127.9 MB in the end (delta: 39.8 MB). Free memory was 51.3 MB in the beginning and 103.8 MB in the end (delta: -52.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2021-11-09 10:36:05,611 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.44 ms. Allocated memory is still 127.9 MB. Free memory was 103.8 MB in the beginning and 102.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:36:05,617 INFO L168 Benchmark]: Boogie Preprocessor took 48.36 ms. Allocated memory is still 127.9 MB. Free memory was 102.2 MB in the beginning and 101.3 MB in the end (delta: 926.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:36:05,618 INFO L168 Benchmark]: RCFGBuilder took 380.48 ms. Allocated memory is still 127.9 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 10:36:05,637 INFO L168 Benchmark]: TraceAbstraction took 710.38 ms. Allocated memory is still 127.9 MB. Free memory was 91.5 MB in the beginning and 69.9 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-09 10:36:05,638 INFO L168 Benchmark]: Witness Printer took 7.66 ms. Allocated memory is still 127.9 MB. Free memory was 69.9 MB in the beginning and 69.6 MB in the end (delta: 296.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:36:05,649 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory was 67.7 MB in the beginning and 67.6 MB in the end (delta: 55.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 335.10 ms. Allocated memory was 88.1 MB in the beginning and 127.9 MB in the end (delta: 39.8 MB). Free memory was 51.3 MB in the beginning and 103.8 MB in the end (delta: -52.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.44 ms. Allocated memory is still 127.9 MB. Free memory was 103.8 MB in the beginning and 102.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.36 ms. Allocated memory is still 127.9 MB. Free memory was 102.2 MB in the beginning and 101.3 MB in the end (delta: 926.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 380.48 ms. Allocated memory is still 127.9 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 710.38 ms. Allocated memory is still 127.9 MB. Free memory was 91.5 MB in the beginning and 69.9 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 7.66 ms. Allocated memory is still 127.9 MB. Free memory was 69.9 MB in the beginning and 69.6 MB in the end (delta: 296.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * 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: 14]: 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 37, overapproximation of someBinaryArithmeticFLOAToperation at line 29. Possible FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-09 10:36:05,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/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_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:36:08,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:36:08,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:36:08,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:36:08,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:36:08,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:36:08,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:36:08,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:36:08,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:36:08,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:36:08,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:36:08,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:36:08,650 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:36:08,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:36:08,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:36:08,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:36:08,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:36:08,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:36:08,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:36:08,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:36:08,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:36:08,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:36:08,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:36:08,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:36:08,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:36:08,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:36:08,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:36:08,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:36:08,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:36:08,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:36:08,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:36:08,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:36:08,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:36:08,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:36:08,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:36:08,711 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:36:08,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:36:08,712 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:36:08,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:36:08,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:36:08,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:36:08,721 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-09 10:36:08,765 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:36:08,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:36:08,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:36:08,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:36:08,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:36:08,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:36:08,771 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:36:08,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:36:08,771 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:36:08,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:36:08,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:36:08,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:36:08,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:36:08,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:36:08,774 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-09 10:36:08,774 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-09 10:36:08,774 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:36:08,775 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:36:08,775 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:36:08,775 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:36:08,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:36:08,776 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:36:08,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:36:08,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:36:08,776 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:36:08,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:36:08,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:36:08,777 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-09 10:36:08,778 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-09 10:36:08,778 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:36:08,778 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:36:08,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:36:08,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:36:08,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-09 10:36:08,779 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_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc6c31757d65ac3409144284524de01d782484107762f8e5c588ca3f4aed3437 [2021-11-09 10:36:09,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:36:09,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:36:09,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:36:09,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:36:09,241 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:36:09,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-11-09 10:36:09,327 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/data/42d4c6030/4531f4280ad348c4ab5d47491909cc7f/FLAG9474b4c40 [2021-11-09 10:36:09,891 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:36:09,891 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-11-09 10:36:09,900 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/data/42d4c6030/4531f4280ad348c4ab5d47491909cc7f/FLAG9474b4c40 [2021-11-09 10:36:10,228 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/data/42d4c6030/4531f4280ad348c4ab5d47491909cc7f [2021-11-09 10:36:10,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:36:10,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:36:10,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:36:10,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:36:10,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:36:10,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@451d32b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10, skipping insertion in model container [2021-11-09 10:36:10,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:36:10,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:36:10,483 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_373df763-e55e-4600-aac4-5ab81230755f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-11-09 10:36:10,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:36:10,518 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:36:10,535 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_373df763-e55e-4600-aac4-5ab81230755f/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-11-09 10:36:10,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:36:10,569 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:36:10,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10 WrapperNode [2021-11-09 10:36:10,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:36:10,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:36:10,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:36:10,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:36:10,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:36:10,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:36:10,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:36:10,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:36:10,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,655 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:36:10,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:36:10,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:36:10,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:36:10,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10" (1/1) ... [2021-11-09 10:36:10,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:36:10,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:36:10,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:36:10,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:36:10,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 10:36:10,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:36:10,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:36:10,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:36:14,234 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:36:14,235 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-09 10:36:14,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:36:14 BoogieIcfgContainer [2021-11-09 10:36:14,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:36:14,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:36:14,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:36:14,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:36:14,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:36:10" (1/3) ... [2021-11-09 10:36:14,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0131ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:36:14, skipping insertion in model container [2021-11-09 10:36:14,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:36:10" (2/3) ... [2021-11-09 10:36:14,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e0131ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:36:14, skipping insertion in model container [2021-11-09 10:36:14,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:36:14" (3/3) ... [2021-11-09 10:36:14,247 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-11-09 10:36:14,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:36:14,253 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:36:14,308 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:36:14,317 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=PETRI_NET, 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 [2021-11-09 10:36:14,317 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 10:36:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:36:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-09 10:36:14,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:14,340 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-09 10:36:14,341 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:14,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:14,348 INFO L85 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-11-09 10:36:14,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:36:14,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456812017] [2021-11-09 10:36:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:14,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:36:14,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:36:14,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:36:14,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 10:36:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:36:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-09 10:36:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:36:14,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:36:14,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:36:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:36:14,928 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:36:14,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456812017] [2021-11-09 10:36:14,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456812017] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:36:14,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:36:14,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:36:14,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819848882] [2021-11-09 10:36:14,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:36:14,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:36:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:36:14,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:36:14,957 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:36:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:36:14,973 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-09 10:36:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:36:14,974 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-09 10:36:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:36:14,984 INFO L225 Difference]: With dead ends: 20 [2021-11-09 10:36:14,984 INFO L226 Difference]: Without dead ends: 8 [2021-11-09 10:36:14,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:36:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-09 10:36:15,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-09 10:36:15,020 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) [2021-11-09 10:36:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-09 10:36:15,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-11-09 10:36:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:36:15,023 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-09 10:36:15,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:36:15,023 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-09 10:36:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 10:36:15,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:36:15,024 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:36:15,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:36:15,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:36:15,240 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 10:36:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:36:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2021-11-09 10:36:15,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:36:15,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293409393] [2021-11-09 10:36:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:36:15,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:36:15,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:36:15,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:36:15,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 10:36:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:36:15,911 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 10:36:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 10:36:16,604 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-09 10:36:16,604 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-09 10:36:16,607 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-09 10:36:16,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:36:16,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:36:16,813 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-09 10:36:16,817 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 10:36:16,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 10:36:16 BoogieIcfgContainer [2021-11-09 10:36:16,853 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 10:36:16,854 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 10:36:16,854 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 10:36:16,855 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 10:36:16,855 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:36:14" (3/4) ... [2021-11-09 10:36:16,858 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-09 10:36:16,902 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 10:36:16,902 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 10:36:16,905 INFO L168 Benchmark]: Toolchain (without parser) took 6670.20 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 41.8 MB in the beginning and 61.2 MB in the end (delta: -19.4 MB). Peak memory consumption was 699.9 kB. Max. memory is 16.1 GB. [2021-11-09 10:36:16,905 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 62.9 MB. Free memory is still 42.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:36:16,906 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.50 ms. Allocated memory is still 62.9 MB. Free memory was 41.6 MB in the beginning and 45.9 MB in the end (delta: -4.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-09 10:36:16,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.37 ms. Allocated memory is still 62.9 MB. Free memory was 45.7 MB in the beginning and 44.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:36:16,908 INFO L168 Benchmark]: Boogie Preprocessor took 43.73 ms. Allocated memory is still 62.9 MB. Free memory was 44.2 MB in the beginning and 43.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:36:16,908 INFO L168 Benchmark]: RCFGBuilder took 3552.19 ms. Allocated memory is still 62.9 MB. Free memory was 43.0 MB in the beginning and 33.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 10:36:16,909 INFO L168 Benchmark]: TraceAbstraction took 2614.32 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 32.9 MB in the beginning and 63.3 MB in the end (delta: -30.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2021-11-09 10:36:16,910 INFO L168 Benchmark]: Witness Printer took 48.27 ms. Allocated memory is still 81.8 MB. Free memory was 63.3 MB in the beginning and 61.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 10:36:16,914 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 62.9 MB. Free memory is still 42.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 332.50 ms. Allocated memory is still 62.9 MB. Free memory was 41.6 MB in the beginning and 45.9 MB in the end (delta: -4.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.37 ms. Allocated memory is still 62.9 MB. Free memory was 45.7 MB in the beginning and 44.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.73 ms. Allocated memory is still 62.9 MB. Free memory was 44.2 MB in the beginning and 43.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 3552.19 ms. Allocated memory is still 62.9 MB. Free memory was 43.0 MB in the beginning and 33.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2614.32 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 32.9 MB in the beginning and 63.3 MB in the end (delta: -30.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * Witness Printer took 48.27 ms. Allocated memory is still 81.8 MB. Free memory was 63.3 MB in the beginning and 61.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L20] float x = __VERIFIER_nondet_float() ; [L21] float exp = 1.0 ; [L22] float term = 1.0 ; [L23] unsigned int count = 1 ; [L24] float result = 2*(1/(1-x)) ; [L25] int temp ; [L27] COND TRUE 1 [L29] term = term * (x/count) [L30] exp = exp + term [L31] count++ [L33] temp = __VERIFIER_nondet_int() [L34] COND TRUE temp ==0 [L14] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 proved your program to be incorrect! [2021-11-09 10:36:16,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_373df763-e55e-4600-aac4-5ab81230755f/bin/uautomizer-IVEQpCNsaX/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 Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE