./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 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs --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 a0e23aa9bbb10ea2680f8206f9d74b19166b1199 ................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs --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 a0e23aa9bbb10ea2680f8206f9d74b19166b1199 ......................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:11:23,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:11:23,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:11:23,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:11:23,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:11:23,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:11:23,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:11:23,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:11:23,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:11:23,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:11:23,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:11:23,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:11:23,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:11:23,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:11:23,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:11:23,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:11:23,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:11:23,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:11:23,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:11:23,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:11:23,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:11:23,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:11:23,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:11:23,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:11:23,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:11:23,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:11:23,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:11:23,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:11:23,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:11:23,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:11:23,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:11:23,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:11:23,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:11:23,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:11:23,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:11:23,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:11:23,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:11:23,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:11:23,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:11:23,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:11:23,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:11:23,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:11:23,633 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:11:23,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:11:23,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:11:23,635 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:11:23,636 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:11:23,636 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:11:23,636 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:11:23,637 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:11:23,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:11:23,638 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:11:23,638 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:11:23,638 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:11:23,639 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:11:23,639 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:11:23,639 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:11:23,640 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:11:23,641 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:11:23,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:11:23,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:11:23,641 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:11:23,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:11:23,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:11:23,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:11:23,643 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:11:23,643 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:11:23,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:11:23,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:11:23,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:11:23,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:11:23,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:11:23,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:11:23,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:11:23,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:11:23,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:11:23,646 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:11:23,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:11:23,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:11:23,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:11:23,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:11:23,648 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_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2021-10-16 03:11:24,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:11:24,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:11:24,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:11:24,128 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:11:24,129 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:11:24,131 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-16 03:11:24,220 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/data/d77ace10d/c4835cd286374163985d9d0fc90caee5/FLAG879cb9237 [2021-10-16 03:11:24,912 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:11:24,913 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-16 03:11:24,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/data/d77ace10d/c4835cd286374163985d9d0fc90caee5/FLAG879cb9237 [2021-10-16 03:11:25,248 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/data/d77ace10d/c4835cd286374163985d9d0fc90caee5 [2021-10-16 03:11:25,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:11:25,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:11:25,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:11:25,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:11:25,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:11:25,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5560dd94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25, skipping insertion in model container [2021-10-16 03:11:25,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:11:25,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:11:25,514 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_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-16 03:11:25,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:11:25,544 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:11:25,562 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_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-16 03:11:25,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:11:25,584 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:11:25,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25 WrapperNode [2021-10-16 03:11:25,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:11:25,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:11:25,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:11:25,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:11:25,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,606 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:11:25,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:11:25,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:11:25,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:11:25,640 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,653 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:11:25,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:11:25,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:11:25,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:11:25,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25" (1/1) ... [2021-10-16 03:11:25,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:11:25,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:11:25,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:11:25,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:11:25,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:11:25,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:11:25,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:11:25,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:11:26,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:11:26,157 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 03:11:26,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:11:26 BoogieIcfgContainer [2021-10-16 03:11:26,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:11:26,165 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:11:26,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:11:26,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:11:26,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:11:25" (1/3) ... [2021-10-16 03:11:26,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344981dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:11:26, skipping insertion in model container [2021-10-16 03:11:26,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:25" (2/3) ... [2021-10-16 03:11:26,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344981dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:11:26, skipping insertion in model container [2021-10-16 03:11:26,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:11:26" (3/3) ... [2021-10-16 03:11:26,175 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-10-16 03:11:26,183 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:11:26,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:11:26,259 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:11:26,271 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, mConcurrency=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 [2021-10-16 03:11:26,271 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 03:11:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 03:11:26,321 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:26,322 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 03:11:26,323 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:11:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:26,332 INFO L82 PathProgramCache]: Analyzing trace with hash 62074611, now seen corresponding path program 1 times [2021-10-16 03:11:26,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:26,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245312163] [2021-10-16 03:11:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:26,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:26,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:26,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245312163] [2021-10-16 03:11:26,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245312163] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:26,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:26,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:11:26,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85535603] [2021-10-16 03:11:26,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:11:26,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:26,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:11:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:11:26,612 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-16 03:11:26,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:26,630 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-16 03:11:26,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:11:26,632 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-16 03:11:26,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:26,643 INFO L225 Difference]: With dead ends: 15 [2021-10-16 03:11:26,643 INFO L226 Difference]: Without dead ends: 7 [2021-10-16 03:11:26,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:11:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-16 03:11:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-16 03:11:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-16 03:11:26,685 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-16 03:11:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:26,685 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-16 03:11:26,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2021-10-16 03:11:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-16 03:11:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:11:26,687 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:26,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:11:26,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:11:26,688 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:11:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1900119729, now seen corresponding path program 1 times [2021-10-16 03:11:26,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:26,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381581966] [2021-10-16 03:11:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:26,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:11:26,772 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 03:11:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:11:26,853 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-16 03:11:26,854 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 03:11:26,858 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:11:26,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:11:26,868 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:11:26,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:11:26 BoogieIcfgContainer [2021-10-16 03:11:26,904 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:11:26,905 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:11:26,905 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:11:26,906 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:11:26,907 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:11:26" (3/4) ... [2021-10-16 03:11:26,912 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 03:11:26,912 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:11:26,916 INFO L168 Benchmark]: Toolchain (without parser) took 1661.31 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 55.9 MB in the beginning and 82.2 MB in the end (delta: -26.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:11:26,917 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 90.2 MB. Free memory is still 71.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:11:26,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.01 ms. Allocated memory is still 90.2 MB. Free memory was 55.7 MB in the beginning and 66.7 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:26,919 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.41 ms. Allocated memory is still 90.2 MB. Free memory was 66.7 MB in the beginning and 65.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:26,920 INFO L168 Benchmark]: Boogie Preprocessor took 27.67 ms. Allocated memory is still 90.2 MB. Free memory was 65.1 MB in the beginning and 64.3 MB in the end (delta: 803.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:11:26,921 INFO L168 Benchmark]: RCFGBuilder took 502.27 ms. Allocated memory is still 90.2 MB. Free memory was 64.3 MB in the beginning and 54.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:26,922 INFO L168 Benchmark]: TraceAbstraction took 738.73 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 53.8 MB in the beginning and 82.7 MB in the end (delta: -28.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:11:26,923 INFO L168 Benchmark]: Witness Printer took 8.45 ms. Allocated memory is still 109.1 MB. Free memory was 82.7 MB in the beginning and 82.2 MB in the end (delta: 490.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:11:26,928 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 90.2 MB. Free memory is still 71.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 330.01 ms. Allocated memory is still 90.2 MB. Free memory was 55.7 MB in the beginning and 66.7 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.41 ms. Allocated memory is still 90.2 MB. Free memory was 66.7 MB in the beginning and 65.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.67 ms. Allocated memory is still 90.2 MB. Free memory was 65.1 MB in the beginning and 64.3 MB in the end (delta: 803.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 502.27 ms. Allocated memory is still 90.2 MB. Free memory was 64.3 MB in the beginning and 54.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 738.73 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 53.8 MB in the beginning and 82.7 MB in the end (delta: -28.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 8.45 ms. Allocated memory is still 109.1 MB. Free memory was 82.7 MB in the beginning and 82.2 MB in the end (delta: 490.6 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 609.1ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 35.1ms, AutomataDifference: 59.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 22.2ms SsaConstructionTime, 94.7ms SatisfiabilityAnalysisTime, 76.3ms InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 4 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 [2021-10-16 03:11:26,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:11:30,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:11:30,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:11:30,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:11:30,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:11:30,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:11:30,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:11:30,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:11:30,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:11:30,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:11:30,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:11:30,110 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:11:30,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:11:30,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:11:30,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:11:30,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:11:30,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:11:30,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:11:30,123 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:11:30,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:11:30,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:11:30,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:11:30,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:11:30,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:11:30,139 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:11:30,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:11:30,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:11:30,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:11:30,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:11:30,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:11:30,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:11:30,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:11:30,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:11:30,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:11:30,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:11:30,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:11:30,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:11:30,153 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:11:30,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:11:30,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:11:30,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:11:30,157 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 03:11:30,189 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:11:30,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:11:30,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:11:30,191 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:11:30,191 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:11:30,192 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:11:30,192 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:11:30,192 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:11:30,193 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:11:30,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:11:30,194 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:11:30,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:11:30,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:11:30,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:11:30,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:11:30,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:11:30,196 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:11:30,196 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:11:30,196 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:11:30,197 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:11:30,197 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:11:30,197 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:11:30,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:11:30,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:11:30,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:11:30,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:11:30,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:11:30,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:11:30,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:11:30,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:11:30,200 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:11:30,200 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:11:30,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:11:30,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:11:30,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:11:30,201 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_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0e23aa9bbb10ea2680f8206f9d74b19166b1199 [2021-10-16 03:11:30,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:11:30,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:11:30,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:11:30,712 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:11:30,715 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:11:30,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-16 03:11:30,825 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/data/8d6945b11/621e9b75d39640f6bfc937cf0cf17f82/FLAGb3d114937 [2021-10-16 03:11:31,366 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:11:31,366 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c [2021-10-16 03:11:31,374 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/data/8d6945b11/621e9b75d39640f6bfc937cf0cf17f82/FLAGb3d114937 [2021-10-16 03:11:31,765 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/data/8d6945b11/621e9b75d39640f6bfc937cf0cf17f82 [2021-10-16 03:11:31,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:11:31,781 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:11:31,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:11:31,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:11:31,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:11:31,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:11:31" (1/1) ... [2021-10-16 03:11:31,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71cae34d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:31, skipping insertion in model container [2021-10-16 03:11:31,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:11:31" (1/1) ... [2021-10-16 03:11:31,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:11:31,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:11:32,003 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_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-16 03:11:32,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:11:32,040 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:11:32,057 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_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/sv-benchmarks/c/loop-floats-scientific-comp/loop1-2.c[538,551] [2021-10-16 03:11:32,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:11:32,104 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:11:32,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32 WrapperNode [2021-10-16 03:11:32,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:11:32,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:11:32,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:11:32,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:11:32,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32" (1/1) ... [2021-10-16 03:11:32,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32" (1/1) ... [2021-10-16 03:11:32,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:11:32,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:11:32,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:11:32,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:11:32,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32" (1/1) ... [2021-10-16 03:11:32,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32" (1/1) ... [2021-10-16 03:11:32,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32" (1/1) ... [2021-10-16 03:11:32,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32" (1/1) ... [2021-10-16 03:11:32,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32" (1/1) ... [2021-10-16 03:11:32,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32" (1/1) ... [2021-10-16 03:11:32,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32" (1/1) ... [2021-10-16 03:11:32,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:11:32,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:11:32,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:11:32,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:11:32,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32" (1/1) ... [2021-10-16 03:11:32,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:11:32,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:11:32,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:11:32,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:11:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:11:32,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:11:32,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:11:32,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:11:35,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:11:35,762 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 03:11:35,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:11:35 BoogieIcfgContainer [2021-10-16 03:11:35,765 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:11:35,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:11:35,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:11:35,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:11:35,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:11:31" (1/3) ... [2021-10-16 03:11:35,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9c5495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:11:35, skipping insertion in model container [2021-10-16 03:11:35,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:32" (2/3) ... [2021-10-16 03:11:35,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c9c5495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:11:35, skipping insertion in model container [2021-10-16 03:11:35,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:11:35" (3/3) ... [2021-10-16 03:11:35,777 INFO L111 eAbstractionObserver]: Analyzing ICFG loop1-2.c [2021-10-16 03:11:35,783 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:11:35,784 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:11:35,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:11:35,847 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, mConcurrency=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 [2021-10-16 03:11:35,847 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 03:11:35,865 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) [2021-10-16 03:11:35,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:11:35,872 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:35,873 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:11:35,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:11:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:35,881 INFO L82 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-10-16 03:11:35,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:11:35,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797827189] [2021-10-16 03:11:35,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:35,899 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:11:35,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:11:35,901 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:11:35,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:11:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:36,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 03:11:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:36,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:36,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:11:36,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797827189] [2021-10-16 03:11:36,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797827189] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:36,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:36,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:11:36,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128732573] [2021-10-16 03:11:36,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:11:36,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:11:36,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:11:36,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:11:36,396 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) [2021-10-16 03:11:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:36,413 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-16 03:11:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:11:36,415 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 [2021-10-16 03:11:36,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:36,425 INFO L225 Difference]: With dead ends: 20 [2021-10-16 03:11:36,425 INFO L226 Difference]: Without dead ends: 8 [2021-10-16 03:11:36,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:11:36,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-16 03:11:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-16 03:11:36,462 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) [2021-10-16 03:11:36,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-16 03:11:36,464 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-16 03:11:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:36,465 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-16 03:11:36,465 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) [2021-10-16 03:11:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-16 03:11:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 03:11:36,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:36,467 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:11:36,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:36,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:11:36,687 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:11:36,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:36,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1810664400, now seen corresponding path program 1 times [2021-10-16 03:11:36,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:11:36,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739054382] [2021-10-16 03:11:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:36,690 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:11:36,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:11:36,704 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:11:36,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:11:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:11:37,409 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 03:11:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:11:38,145 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 03:11:38,145 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 03:11:38,148 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:11:38,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:38,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:11:38,357 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:11:38,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:11:38 BoogieIcfgContainer [2021-10-16 03:11:38,384 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:11:38,385 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:11:38,385 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:11:38,385 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:11:38,386 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:11:35" (3/4) ... [2021-10-16 03:11:38,389 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 03:11:38,452 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:11:38,455 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:11:38,463 INFO L168 Benchmark]: Toolchain (without parser) took 6675.81 ms. Allocated memory was 54.5 MB in the beginning and 77.6 MB in the end (delta: 23.1 MB). Free memory was 32.9 MB in the beginning and 44.1 MB in the end (delta: -11.2 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:38,467 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 54.5 MB. Free memory is still 35.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:11:38,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.15 ms. Allocated memory is still 54.5 MB. Free memory was 32.7 MB in the beginning and 38.0 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:38,469 INFO L168 Benchmark]: Boogie Procedure Inliner took 84.09 ms. Allocated memory was 54.5 MB in the beginning and 77.6 MB in the end (delta: 23.1 MB). Free memory was 38.0 MB in the beginning and 61.1 MB in the end (delta: -23.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:38,470 INFO L168 Benchmark]: Boogie Preprocessor took 53.55 ms. Allocated memory is still 77.6 MB. Free memory was 61.1 MB in the beginning and 59.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:11:38,471 INFO L168 Benchmark]: RCFGBuilder took 3519.93 ms. Allocated memory is still 77.6 MB. Free memory was 59.9 MB in the beginning and 50.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:38,472 INFO L168 Benchmark]: TraceAbstraction took 2615.92 ms. Allocated memory is still 77.6 MB. Free memory was 50.0 MB in the beginning and 45.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:38,473 INFO L168 Benchmark]: Witness Printer took 70.93 ms. Allocated memory is still 77.6 MB. Free memory was 45.9 MB in the beginning and 44.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:38,480 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 54.5 MB. Free memory is still 35.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 303.15 ms. Allocated memory is still 54.5 MB. Free memory was 32.7 MB in the beginning and 38.0 MB in the end (delta: -5.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 84.09 ms. Allocated memory was 54.5 MB in the beginning and 77.6 MB in the end (delta: 23.1 MB). Free memory was 38.0 MB in the beginning and 61.1 MB in the end (delta: -23.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.55 ms. Allocated memory is still 77.6 MB. Free memory was 61.1 MB in the beginning and 59.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 3519.93 ms. Allocated memory is still 77.6 MB. Free memory was 59.9 MB in the beginning and 50.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2615.92 ms. Allocated memory is still 77.6 MB. Free memory was 50.0 MB in the beginning and 45.9 MB in the end (delta: 4.1 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * Witness Printer took 70.93 ms. Allocated memory is still 77.6 MB. Free memory was 45.9 MB in the beginning and 44.1 MB in the end (delta: 1.7 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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: 2520.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 12.2ms, AutomataDifference: 51.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms 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, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.3ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 24.5ms SsaConstructionTime, 925.4ms SatisfiabilityAnalysisTime, 151.2ms 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! [2021-10-16 03:11:38,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_479cc0ce-61d1-4dc7-8b7c-f4031ad6ddb1/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...