./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI --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_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI --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 0.2.0-7b2dab5 [2021-10-11 02:24:37,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:24:37,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:24:37,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:24:37,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:24:37,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:24:37,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:24:38,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:24:38,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:24:38,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:24:38,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:24:38,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:24:38,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:24:38,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:24:38,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:24:38,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:24:38,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:24:38,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:24:38,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:24:38,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:24:38,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:24:38,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:24:38,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:24:38,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:24:38,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:24:38,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:24:38,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:24:38,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:24:38,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:24:38,046 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:24:38,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:24:38,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:24:38,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:24:38,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:24:38,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:24:38,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:24:38,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:24:38,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:24:38,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:24:38,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:24:38,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:24:38,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:24:38,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:24:38,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:24:38,102 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:24:38,102 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:24:38,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:24:38,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:24:38,103 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:24:38,109 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:24:38,109 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:24:38,109 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:24:38,110 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:24:38,111 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:24:38,111 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:24:38,111 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:24:38,111 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:24:38,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:24:38,113 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:24:38,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:24:38,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:24:38,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:24:38,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:24:38,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:24:38,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:24:38,114 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:24:38,114 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:24:38,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:24:38,115 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:24:38,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:24:38,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:24:38,117 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:24:38,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:24:38,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:24:38,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:24:38,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:24:38,118 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:24:38,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:24:38,118 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:24:38,118 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:24:38,119 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:24:38,119 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_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2021-10-11 02:24:38,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:24:38,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:24:38,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:24:38,409 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:24:38,410 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:24:38,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-11 02:24:38,479 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/data/50c132b46/693fda18ded54d29a5dd02e544971c13/FLAG5c35bc497 [2021-10-11 02:24:38,918 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:24:38,920 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-11 02:24:38,931 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/data/50c132b46/693fda18ded54d29a5dd02e544971c13/FLAG5c35bc497 [2021-10-11 02:24:39,313 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/data/50c132b46/693fda18ded54d29a5dd02e544971c13 [2021-10-11 02:24:39,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:24:39,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:24:39,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:39,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:24:39,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:24:39,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:39" (1/1) ... [2021-10-11 02:24:39,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f30a501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39, skipping insertion in model container [2021-10-11 02:24:39,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:39" (1/1) ... [2021-10-11 02:24:39,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:24:39,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:24:39,548 WARN L226 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_3956e74f-d56c-483f-b9b7-27311cd1fac0/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-11 02:24:39,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:39,568 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:24:39,580 WARN L226 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_3956e74f-d56c-483f-b9b7-27311cd1fac0/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-11 02:24:39,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:39,596 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:24:39,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39 WrapperNode [2021-10-11 02:24:39,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:39,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:39,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:24:39,598 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:24:39,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39" (1/1) ... [2021-10-11 02:24:39,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39" (1/1) ... [2021-10-11 02:24:39,628 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:39,629 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:24:39,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:24:39,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:24:39,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39" (1/1) ... [2021-10-11 02:24:39,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39" (1/1) ... [2021-10-11 02:24:39,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39" (1/1) ... [2021-10-11 02:24:39,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39" (1/1) ... [2021-10-11 02:24:39,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39" (1/1) ... [2021-10-11 02:24:39,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39" (1/1) ... [2021-10-11 02:24:39,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39" (1/1) ... [2021-10-11 02:24:39,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:24:39,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:24:39,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:24:39,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:24:39,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:24:39,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:24:39,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:24:39,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:24:39,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:24:40,096 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:24:40,097 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:24:40,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:40 BoogieIcfgContainer [2021-10-11 02:24:40,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:24:40,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:24:40,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:24:40,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:24:40,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:24:39" (1/3) ... [2021-10-11 02:24:40,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5300a06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:40, skipping insertion in model container [2021-10-11 02:24:40,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:39" (2/3) ... [2021-10-11 02:24:40,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5300a06e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:40, skipping insertion in model container [2021-10-11 02:24:40,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:40" (3/3) ... [2021-10-11 02:24:40,141 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-11 02:24:40,154 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:24:40,169 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:24:40,179 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:24:40,201 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:24:40,202 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:24:40,202 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:24:40,202 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:24:40,202 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:24:40,202 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:24:40,203 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:24:40,203 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:24:40,214 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2021-10-11 02:24:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:24:40,219 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:40,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:24:40,220 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:40,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:40,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1947436, now seen corresponding path program 1 times [2021-10-11 02:24:40,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:40,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585474516] [2021-10-11 02:24:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:24:40,403 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:24:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:24:40,457 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:24:40,479 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:24:40,480 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:24:40,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:24:40,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:24:40 BoogieIcfgContainer [2021-10-11 02:24:40,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:24:40,507 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:24:40,507 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:24:40,507 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:24:40,508 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:40" (3/4) ... [2021-10-11 02:24:40,515 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:24:40,515 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:24:40,519 INFO L168 Benchmark]: Toolchain (without parser) took 1200.04 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 52.4 MB in the beginning and 75.5 MB in the end (delta: -23.1 MB). Peak memory consumption was 17.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:40,521 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 86.0 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:40,522 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.23 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 52.2 MB in the beginning and 105.4 MB in the end (delta: -53.2 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:40,524 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.48 ms. Allocated memory is still 130.0 MB. Free memory was 105.4 MB in the beginning and 103.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:40,525 INFO L168 Benchmark]: Boogie Preprocessor took 18.56 ms. Allocated memory is still 130.0 MB. Free memory was 103.9 MB in the beginning and 103.0 MB in the end (delta: 925.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:40,526 INFO L168 Benchmark]: RCFGBuilder took 470.86 ms. Allocated memory is still 130.0 MB. Free memory was 103.0 MB in the beginning and 88.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:40,527 INFO L168 Benchmark]: TraceAbstraction took 382.96 ms. Allocated memory is still 130.0 MB. Free memory was 87.7 MB in the beginning and 75.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:40,528 INFO L168 Benchmark]: Witness Printer took 8.62 ms. Allocated memory is still 130.0 MB. Free memory was 75.7 MB in the beginning and 75.5 MB in the end (delta: 228.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:40,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 86.0 MB. Free memory is still 49.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.23 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 52.2 MB in the beginning and 105.4 MB in the end (delta: -53.2 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.48 ms. Allocated memory is still 130.0 MB. Free memory was 105.4 MB in the beginning and 103.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.56 ms. Allocated memory is still 130.0 MB. Free memory was 103.9 MB in the beginning and 103.0 MB in the end (delta: 925.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 470.86 ms. Allocated memory is still 130.0 MB. Free memory was 103.0 MB in the beginning and 88.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 382.96 ms. Allocated memory is still 130.0 MB. Free memory was 87.7 MB in the beginning and 75.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 8.62 ms. Allocated memory is still 130.0 MB. Free memory was 75.7 MB in the beginning and 75.5 MB in the end (delta: 228.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:24:42,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:24:42,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:24:43,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:24:43,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:24:43,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:24:43,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:24:43,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:24:43,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:24:43,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:24:43,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:24:43,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:24:43,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:24:43,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:24:43,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:24:43,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:24:43,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:24:43,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:24:43,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:24:43,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:24:43,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:24:43,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:24:43,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:24:43,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:24:43,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:24:43,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:24:43,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:24:43,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:24:43,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:24:43,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:24:43,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:24:43,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:24:43,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:24:43,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:24:43,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:24:43,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:24:43,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:24:43,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:24:43,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:24:43,120 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:24:43,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:24:43,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:24:43,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:24:43,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:24:43,169 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:24:43,170 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:24:43,170 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:24:43,170 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:24:43,170 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:24:43,170 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:24:43,171 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:24:43,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:24:43,173 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:24:43,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:24:43,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:24:43,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:24:43,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:24:43,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:24:43,175 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:24:43,175 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:24:43,175 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:24:43,175 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:24:43,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:24:43,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:24:43,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:24:43,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:24:43,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:24:43,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:24:43,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:24:43,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:24:43,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:24:43,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:24:43,178 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:24:43,178 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:24:43,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:24:43,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:24:43,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:24:43,179 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_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2021-10-11 02:24:43,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:24:43,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:24:43,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:24:43,606 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:24:43,607 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:24:43,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-11 02:24:43,664 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/data/8386ae7fb/b7747d6c76274c97ad89ac1f90cabeb2/FLAG943db41e1 [2021-10-11 02:24:44,131 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:24:44,132 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/sv-benchmarks/c/float-benchs/inv_square-1.c [2021-10-11 02:24:44,140 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/data/8386ae7fb/b7747d6c76274c97ad89ac1f90cabeb2/FLAG943db41e1 [2021-10-11 02:24:44,491 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/data/8386ae7fb/b7747d6c76274c97ad89ac1f90cabeb2 [2021-10-11 02:24:44,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:24:44,495 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:24:44,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:44,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:24:44,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:24:44,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:44" (1/1) ... [2021-10-11 02:24:44,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d34ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44, skipping insertion in model container [2021-10-11 02:24:44,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:44" (1/1) ... [2021-10-11 02:24:44,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:24:44,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:24:44,655 WARN L226 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_3956e74f-d56c-483f-b9b7-27311cd1fac0/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-11 02:24:44,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:44,684 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:24:44,735 WARN L226 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_3956e74f-d56c-483f-b9b7-27311cd1fac0/sv-benchmarks/c/float-benchs/inv_square-1.c[487,500] [2021-10-11 02:24:44,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:24:44,752 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:24:44,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44 WrapperNode [2021-10-11 02:24:44,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:24:44,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:44,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:24:44,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:24:44,761 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44" (1/1) ... [2021-10-11 02:24:44,770 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44" (1/1) ... [2021-10-11 02:24:44,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:24:44,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:24:44,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:24:44,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:24:44,794 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44" (1/1) ... [2021-10-11 02:24:44,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44" (1/1) ... [2021-10-11 02:24:44,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44" (1/1) ... [2021-10-11 02:24:44,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44" (1/1) ... [2021-10-11 02:24:44,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44" (1/1) ... [2021-10-11 02:24:44,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44" (1/1) ... [2021-10-11 02:24:44,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44" (1/1) ... [2021-10-11 02:24:44,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:24:44,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:24:44,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:24:44,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:24:44,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:24:44,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:24:44,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:24:44,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:24:44,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:24:46,122 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:24:46,122 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:24:46,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:46 BoogieIcfgContainer [2021-10-11 02:24:46,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:24:46,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:24:46,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:24:46,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:24:46,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:24:44" (1/3) ... [2021-10-11 02:24:46,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0de447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:46, skipping insertion in model container [2021-10-11 02:24:46,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:44" (2/3) ... [2021-10-11 02:24:46,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0de447 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:46, skipping insertion in model container [2021-10-11 02:24:46,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:46" (3/3) ... [2021-10-11 02:24:46,138 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2021-10-11 02:24:46,151 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:24:46,168 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:24:46,178 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:24:46,199 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:24:46,199 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:24:46,199 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:24:46,199 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:24:46,199 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:24:46,199 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:24:46,200 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:24:46,200 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:24:46,211 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-10-11 02:24:46,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:24:46,215 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:46,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:24:46,216 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-10-11 02:24:46,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:46,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978923105] [2021-10-11 02:24:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:46,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:24:46,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:46,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:24:46,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978923105] [2021-10-11 02:24:46,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:46,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:24:46,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301861274] [2021-10-11 02:24:46,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:24:46,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:24:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:24:46,476 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-10-11 02:24:46,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:46,490 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:24:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:24:46,492 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 02:24:46,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:46,499 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:24:46,500 INFO L226 Difference]: Without dead ends: 7 [2021-10-11 02:24:46,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:24:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-11 02:24:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-11 02:24:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 02:24:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-11 02:24:46,531 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-10-11 02:24:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:46,531 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-11 02:24:46,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:24:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-11 02:24:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:24:46,532 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:46,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:24:46,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:24:46,748 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:46,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:46,749 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-10-11 02:24:46,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:46,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125088943] [2021-10-11 02:24:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:24:46,868 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:24:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:24:46,962 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:24:46,989 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-11 02:24:46,989 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:24:47,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:24:47,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:24:47 BoogieIcfgContainer [2021-10-11 02:24:47,211 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:24:47,212 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:24:47,212 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:24:47,212 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:24:47,213 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:46" (3/4) ... [2021-10-11 02:24:47,215 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:24:47,248 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3956e74f-d56c-483f-b9b7-27311cd1fac0/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:24:47,248 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:24:47,250 INFO L168 Benchmark]: Toolchain (without parser) took 2754.27 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 50.0 MB in the beginning and 46.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 23.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:47,251 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 67.1 MB. Free memory was 49.1 MB in the beginning and 49.1 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:47,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.62 ms. Allocated memory is still 67.1 MB. Free memory was 49.7 MB in the beginning and 51.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:47,252 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.27 ms. Allocated memory is still 67.1 MB. Free memory was 51.1 MB in the beginning and 49.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:47,252 INFO L168 Benchmark]: Boogie Preprocessor took 24.13 ms. Allocated memory is still 67.1 MB. Free memory was 49.5 MB in the beginning and 48.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:47,253 INFO L168 Benchmark]: RCFGBuilder took 1312.94 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 37.0 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:47,254 INFO L168 Benchmark]: TraceAbstraction took 1085.81 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 36.5 MB in the beginning and 48.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:47,255 INFO L168 Benchmark]: Witness Printer took 36.28 ms. Allocated memory is still 86.0 MB. Free memory was 48.0 MB in the beginning and 46.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:47,258 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 67.1 MB. Free memory was 49.1 MB in the beginning and 49.1 MB in the end (delta: 54.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 256.62 ms. Allocated memory is still 67.1 MB. Free memory was 49.7 MB in the beginning and 51.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.27 ms. Allocated memory is still 67.1 MB. Free memory was 51.1 MB in the beginning and 49.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.13 ms. Allocated memory is still 67.1 MB. Free memory was 49.5 MB in the beginning and 48.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1312.94 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 37.0 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1085.81 ms. Allocated memory was 67.1 MB in the beginning and 86.0 MB in the end (delta: 18.9 MB). Free memory was 36.5 MB in the beginning and 48.0 MB in the end (delta: -11.4 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * Witness Printer took 36.28 ms. Allocated memory is still 86.0 MB. Free memory was 48.0 MB in the beginning and 46.3 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: - 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. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 SizeOfPredicates, 0 NumberOfNonLiveVariables, 32 ConjunctsInSsa, 1 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 proved your program to be incorrect! Received shutdown request...