./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_square-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8 --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 53d53b1526e829d58326d87a7aff591d9debe20f ................................................................................................................................................................................................................................................. 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_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8 --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 53d53b1526e829d58326d87a7aff591d9debe20f .................................................................................................................................................................................................................................................................................................. 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-4e77c04 [2021-10-13 07:16:43,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:16:43,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:16:43,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:16:43,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:16:43,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:16:43,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:16:43,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:16:43,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:16:43,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:16:43,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:16:43,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:16:43,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:16:43,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:16:43,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:16:43,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:16:43,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:16:43,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:16:43,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:16:43,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:16:43,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:16:43,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:16:43,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:16:43,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:16:43,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:16:43,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:16:43,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:16:43,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:16:43,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:16:43,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:16:43,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:16:43,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:16:43,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:16:43,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:16:43,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:16:43,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:16:43,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:16:43,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:16:43,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:16:43,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:16:43,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:16:43,599 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:16:43,646 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:16:43,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:16:43,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:16:43,648 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:16:43,648 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:16:43,648 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:16:43,649 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:16:43,649 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:16:43,649 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:16:43,650 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:16:43,666 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:16:43,667 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:16:43,667 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:16:43,667 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:16:43,668 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:16:43,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:16:43,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:16:43,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:16:43,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:16:43,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:16:43,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:16:43,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:16:43,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:16:43,671 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:16:43,671 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:16:43,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:16:43,671 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:16:43,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:16:43,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:16:43,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:16:43,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:16:43,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:16:43,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:16:43,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:16:43,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:16:43,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:16:43,674 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:16:43,674 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:16:43,674 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:16:43,674 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_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2021-10-13 07:16:43,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:16:43,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:16:43,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:16:43,991 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:16:43,992 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:16:43,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-13 07:16:44,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/data/7eb6f1339/f8b88627964e4424b6e14f415aebcdaf/FLAGc4317712b [2021-10-13 07:16:44,620 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:16:44,623 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-13 07:16:44,636 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/data/7eb6f1339/f8b88627964e4424b6e14f415aebcdaf/FLAGc4317712b [2021-10-13 07:16:44,969 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/data/7eb6f1339/f8b88627964e4424b6e14f415aebcdaf [2021-10-13 07:16:44,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:16:44,976 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:16:44,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:16:44,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:16:44,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:16:44,982 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:44" (1/1) ... [2021-10-13 07:16:44,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e6458d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:44, skipping insertion in model container [2021-10-13 07:16:44,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:44" (1/1) ... [2021-10-13 07:16:44,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:16:45,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:16:45,140 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_916f8139-0d23-4964-a896-ea95aaa4a4da/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-13 07:16:45,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:16:45,162 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:16:45,176 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_916f8139-0d23-4964-a896-ea95aaa4a4da/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-13 07:16:45,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:16:45,201 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:16:45,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45 WrapperNode [2021-10-13 07:16:45,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:16:45,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:16:45,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:16:45,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:16:45,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45" (1/1) ... [2021-10-13 07:16:45,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45" (1/1) ... [2021-10-13 07:16:45,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:16:45,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:16:45,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:16:45,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:16:45,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45" (1/1) ... [2021-10-13 07:16:45,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45" (1/1) ... [2021-10-13 07:16:45,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45" (1/1) ... [2021-10-13 07:16:45,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45" (1/1) ... [2021-10-13 07:16:45,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45" (1/1) ... [2021-10-13 07:16:45,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45" (1/1) ... [2021-10-13 07:16:45,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45" (1/1) ... [2021-10-13 07:16:45,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:16:45,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:16:45,325 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:16:45,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:16:45,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45" (1/1) ... [2021-10-13 07:16:45,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:16:45,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:16:45,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:16:45,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:16:45,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:16:45,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:16:45,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:16:45,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:16:45,730 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:16:45,730 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:16:45,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:45 BoogieIcfgContainer [2021-10-13 07:16:45,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:16:45,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:16:45,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:16:45,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:16:45,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:16:44" (1/3) ... [2021-10-13 07:16:45,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1197b18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:45, skipping insertion in model container [2021-10-13 07:16:45,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:45" (2/3) ... [2021-10-13 07:16:45,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1197b18e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:45, skipping insertion in model container [2021-10-13 07:16:45,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:45" (3/3) ... [2021-10-13 07:16:45,760 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-13 07:16:45,766 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:16:45,766 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:16:45,874 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:16:45,894 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 [2021-10-13 07:16:45,906 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:16:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:16:45,933 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:45,933 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:16:45,934 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:45,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:45,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1947436, now seen corresponding path program 1 times [2021-10-13 07:16:45,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:16:45,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148594323] [2021-10-13 07:16:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:45,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:16:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:16:46,066 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:16:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:16:46,114 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:16:46,116 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:16:46,118 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:16:46,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:16:46,128 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:16:46,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:16:46 BoogieIcfgContainer [2021-10-13 07:16:46,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:16:46,149 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:16:46,149 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:16:46,149 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:16:46,150 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:45" (3/4) ... [2021-10-13 07:16:46,154 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 07:16:46,154 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:16:46,157 INFO L168 Benchmark]: Toolchain (without parser) took 1179.23 ms. Allocated memory is still 134.2 MB. Free memory was 112.1 MB in the beginning and 85.4 MB in the end (delta: 26.6 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:46,158 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:16:46,159 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.05 ms. Allocated memory is still 134.2 MB. Free memory was 111.6 MB in the beginning and 112.6 MB in the end (delta: -1.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:46,159 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.81 ms. Allocated memory is still 134.2 MB. Free memory was 112.6 MB in the beginning and 111.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:46,160 INFO L168 Benchmark]: Boogie Preprocessor took 44.75 ms. Allocated memory is still 134.2 MB. Free memory was 111.1 MB in the beginning and 110.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:16:46,161 INFO L168 Benchmark]: RCFGBuilder took 409.01 ms. Allocated memory is still 134.2 MB. Free memory was 110.1 MB in the beginning and 99.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:46,162 INFO L168 Benchmark]: TraceAbstraction took 412.31 ms. Allocated memory is still 134.2 MB. Free memory was 99.1 MB in the beginning and 85.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:46,163 INFO L168 Benchmark]: Witness Printer took 5.57 ms. Allocated memory is still 134.2 MB. Free memory was 85.9 MB in the beginning and 85.4 MB in the end (delta: 494.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:16:46,168 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 86.0 MB. Free memory is still 55.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 224.05 ms. Allocated memory is still 134.2 MB. Free memory was 111.6 MB in the beginning and 112.6 MB in the end (delta: -1.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.81 ms. Allocated memory is still 134.2 MB. Free memory was 112.6 MB in the beginning and 111.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.75 ms. Allocated memory is still 134.2 MB. Free memory was 111.1 MB in the beginning and 110.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 409.01 ms. Allocated memory is still 134.2 MB. Free memory was 110.1 MB in the beginning and 99.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 412.31 ms. Allocated memory is still 134.2 MB. Free memory was 99.1 MB in the beginning and 85.9 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Witness Printer took 5.57 ms. Allocated memory is still 134.2 MB. Free memory was 85.9 MB in the beginning and 85.4 MB in the end (delta: 494.5 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: 13]: 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 22, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 253.8ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 13.3ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.2ms SsaConstructionTime, 48.0ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-13 07:16:46,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:16:49,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:16:49,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:16:49,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:16:49,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:16:49,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:16:49,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:16:49,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:16:49,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:16:49,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:16:49,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:16:49,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:16:49,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:16:49,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:16:49,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:16:49,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:16:49,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:16:49,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:16:49,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:16:49,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:16:49,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:16:49,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:16:49,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:16:49,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:16:49,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:16:49,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:16:49,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:16:49,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:16:49,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:16:49,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:16:49,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:16:49,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:16:49,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:16:49,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:16:49,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:16:49,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:16:49,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:16:49,355 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:16:49,355 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:16:49,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:16:49,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:16:49,359 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:16:49,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:16:49,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:16:49,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:16:49,399 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:16:49,399 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:16:49,400 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:16:49,400 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:16:49,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:16:49,400 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:16:49,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:16:49,404 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:16:49,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:16:49,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:16:49,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:16:49,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:16:49,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:16:49,405 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:16:49,406 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:16:49,406 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:16:49,406 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:16:49,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:16:49,407 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:16:49,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:16:49,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:16:49,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:16:49,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:16:49,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:16:49,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:16:49,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:16:49,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:16:49,410 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:16:49,410 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:16:49,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:16:49,411 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:16:49,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:16:49,412 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_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2021-10-13 07:16:49,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:16:49,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:16:49,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:16:49,909 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:16:49,910 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:16:49,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-13 07:16:49,986 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/data/48494e40e/d200ef724df14e75859055b79503c713/FLAG177cb73e1 [2021-10-13 07:16:50,553 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:16:50,553 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-13 07:16:50,561 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/data/48494e40e/d200ef724df14e75859055b79503c713/FLAG177cb73e1 [2021-10-13 07:16:50,909 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/data/48494e40e/d200ef724df14e75859055b79503c713 [2021-10-13 07:16:50,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:16:50,916 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:16:50,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:16:50,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:16:50,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:16:50,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:50" (1/1) ... [2021-10-13 07:16:50,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77101485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:50, skipping insertion in model container [2021-10-13 07:16:50,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:50" (1/1) ... [2021-10-13 07:16:50,935 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:16:50,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:16:51,138 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_916f8139-0d23-4964-a896-ea95aaa4a4da/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-13 07:16:51,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:16:51,170 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:16:51,188 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_916f8139-0d23-4964-a896-ea95aaa4a4da/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-13 07:16:51,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:16:51,213 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:16:51,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51 WrapperNode [2021-10-13 07:16:51,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:16:51,217 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:16:51,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:16:51,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:16:51,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2021-10-13 07:16:51,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2021-10-13 07:16:51,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:16:51,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:16:51,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:16:51,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:16:51,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2021-10-13 07:16:51,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2021-10-13 07:16:51,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2021-10-13 07:16:51,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2021-10-13 07:16:51,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2021-10-13 07:16:51,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2021-10-13 07:16:51,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2021-10-13 07:16:51,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:16:51,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:16:51,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:16:51,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:16:51,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2021-10-13 07:16:51,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:16:51,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:16:51,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:16:51,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:16:51,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:16:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:16:51,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:16:51,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:16:52,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:16:52,365 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:16:52,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:52 BoogieIcfgContainer [2021-10-13 07:16:52,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:16:52,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:16:52,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:16:52,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:16:52,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:16:50" (1/3) ... [2021-10-13 07:16:52,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1087bb67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:52, skipping insertion in model container [2021-10-13 07:16:52,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (2/3) ... [2021-10-13 07:16:52,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1087bb67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:52, skipping insertion in model container [2021-10-13 07:16:52,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:52" (3/3) ... [2021-10-13 07:16:52,376 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-13 07:16:52,382 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:16:52,383 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:16:52,433 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:16:52,440 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 [2021-10-13 07:16:52,441 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:16:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:16:52,461 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:52,462 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:16:52,462 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:52,469 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-10-13 07:16:52,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:52,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072779764] [2021-10-13 07:16:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:52,485 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:52,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:52,510 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:52,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:16:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:52,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:16:52,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:52,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:52,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:52,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072779764] [2021-10-13 07:16:52,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072779764] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:16:52,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:16:52,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:16:52,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006842459] [2021-10-13 07:16:52,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:16:52,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:52,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:16:52,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:16:52,802 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-10-13 07:16:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:52,818 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-13 07:16:52,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:16:52,820 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 [2021-10-13 07:16:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:52,830 INFO L225 Difference]: With dead ends: 21 [2021-10-13 07:16:52,831 INFO L226 Difference]: Without dead ends: 7 [2021-10-13 07:16:52,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:16:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-13 07:16:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-13 07:16:52,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 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) [2021-10-13 07:16:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-13 07:16:52,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-10-13 07:16:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:52,869 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-13 07:16:52,870 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) [2021-10-13 07:16:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-13 07:16:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:16:52,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:52,871 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:16:52,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:53,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:53,086 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:53,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:53,088 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-10-13 07:16:53,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:53,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470817741] [2021-10-13 07:16:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:53,090 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:53,095 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:53,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:16:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:16:53,218 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:16:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:16:53,340 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:16:53,340 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:16:53,342 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:16:53,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 07:16:53,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:16:53,550 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:16:53,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:16:53 BoogieIcfgContainer [2021-10-13 07:16:53,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:16:53,575 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:16:53,575 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:16:53,575 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:16:53,576 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:52" (3/4) ... [2021-10-13 07:16:53,578 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:16:53,617 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:16:53,618 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:16:53,620 INFO L168 Benchmark]: Toolchain (without parser) took 2702.82 ms. Allocated memory was 65.0 MB in the beginning and 83.9 MB in the end (delta: 18.9 MB). Free memory was 44.6 MB in the beginning and 51.0 MB in the end (delta: -6.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:53,621 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 65.0 MB. Free memory was 45.2 MB in the beginning and 45.2 MB in the end (delta: 52.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:16:53,622 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.84 ms. Allocated memory is still 65.0 MB. Free memory was 44.5 MB in the beginning and 34.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:53,622 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.52 ms. Allocated memory is still 65.0 MB. Free memory was 34.4 MB in the beginning and 48.1 MB in the end (delta: -13.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:53,623 INFO L168 Benchmark]: Boogie Preprocessor took 53.77 ms. Allocated memory is still 65.0 MB. Free memory was 48.1 MB in the beginning and 46.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:16:53,624 INFO L168 Benchmark]: RCFGBuilder took 1028.67 ms. Allocated memory is still 65.0 MB. Free memory was 46.9 MB in the beginning and 37.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:53,625 INFO L168 Benchmark]: TraceAbstraction took 1204.68 ms. Allocated memory was 65.0 MB in the beginning and 83.9 MB in the end (delta: 18.9 MB). Free memory was 37.4 MB in the beginning and 53.1 MB in the end (delta: -15.7 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:53,626 INFO L168 Benchmark]: Witness Printer took 43.16 ms. Allocated memory is still 83.9 MB. Free memory was 52.7 MB in the beginning and 51.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:53,630 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 65.0 MB. Free memory was 45.2 MB in the beginning and 45.2 MB in the end (delta: 52.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 294.84 ms. Allocated memory is still 65.0 MB. Free memory was 44.5 MB in the beginning and 34.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.52 ms. Allocated memory is still 65.0 MB. Free memory was 34.4 MB in the beginning and 48.1 MB in the end (delta: -13.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.77 ms. Allocated memory is still 65.0 MB. Free memory was 48.1 MB in the beginning and 46.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1028.67 ms. Allocated memory is still 65.0 MB. Free memory was 46.9 MB in the beginning and 37.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1204.68 ms. Allocated memory was 65.0 MB in the beginning and 83.9 MB in the end (delta: 18.9 MB). Free memory was 37.4 MB in the beginning and 53.1 MB in the end (delta: -15.7 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * Witness Printer took 43.16 ms. Allocated memory is still 83.9 MB. Free memory was 52.7 MB in the beginning and 51.0 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: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1117.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 10.7ms, AutomataDifference: 61.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.8ms, 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, 0.1ms 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: 17.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 19.6ms SsaConstructionTime, 188.5ms SatisfiabilityAnalysisTime, 96.7ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 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! [2021-10-13 07:16:53,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_916f8139-0d23-4964-a896-ea95aaa4a4da/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...