./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH --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 a3f1488b0e5756e8d9e219e50ec38e84e8e4fac76b2e3a5e1785d4e14d4111d8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:44:45,138 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:44:45,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:44:45,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:44:45,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:44:45,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:44:45,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:44:45,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:44:45,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:44:45,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:44:45,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:44:45,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:44:45,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:44:45,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:44:45,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:44:45,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:44:45,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:44:45,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:44:45,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:44:45,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:44:45,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:44:45,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:44:45,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:44:45,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:44:45,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:44:45,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:44:45,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:44:45,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:44:45,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:44:45,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:44:45,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:44:45,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:44:45,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:44:45,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:44:45,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:44:45,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:44:45,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:44:45,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:44:45,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:44:45,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:44:45,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:44:45,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:44:45,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:44:45,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:44:45,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:44:45,309 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:44:45,309 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:44:45,310 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:44:45,310 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:44:45,310 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:44:45,310 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:44:45,310 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:44:45,311 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:44:45,312 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:44:45,312 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:44:45,312 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:44:45,312 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:44:45,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:44:45,313 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:44:45,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:44:45,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:44:45,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:44:45,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:44:45,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:44:45,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:44:45,315 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:44:45,315 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:44:45,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:44:45,315 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:44:45,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:44:45,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:44:45,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:44:45,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:44:45,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:44:45,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:44:45,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:44:45,319 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:44:45,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:44:45,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:44:45,319 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:44:45,319 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:44:45,319 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_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3f1488b0e5756e8d9e219e50ec38e84e8e4fac76b2e3a5e1785d4e14d4111d8 [2021-11-03 05:44:45,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:44:45,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:44:45,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:44:45,646 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:44:45,647 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:44:45,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-11-03 05:44:45,716 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/data/d9413799f/ed87c60bf5d44d09bbf1b0badcdab8bc/FLAGe23ad0df0 [2021-11-03 05:44:46,247 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:44:46,248 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-11-03 05:44:46,260 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/data/d9413799f/ed87c60bf5d44d09bbf1b0badcdab8bc/FLAGe23ad0df0 [2021-11-03 05:44:46,609 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/data/d9413799f/ed87c60bf5d44d09bbf1b0badcdab8bc [2021-11-03 05:44:46,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:44:46,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:44:46,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:44:46,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:44:46,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:44:46,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d4b076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46, skipping insertion in model container [2021-11-03 05:44:46,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:44:46,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:44:46,806 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_3402afcd-8cfc-4ea9-ab32-0560c5197f60/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-11-03 05:44:46,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:44:46,852 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:44:46,865 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_3402afcd-8cfc-4ea9-ab32-0560c5197f60/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-11-03 05:44:46,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:44:46,886 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:44:46,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46 WrapperNode [2021-11-03 05:44:46,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:44:46,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:44:46,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:44:46,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:44:46,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:44:46,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:44:46,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:44:46,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:44:46,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:44:46,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:44:46,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:44:46,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:44:46,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46" (1/1) ... [2021-11-03 05:44:46,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:44:46,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:44:46,991 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:44:47,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:44:47,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:44:47,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:44:47,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:44:47,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:44:47,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:44:47,343 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-03 05:44:47,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:44:47 BoogieIcfgContainer [2021-11-03 05:44:47,345 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:44:47,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:44:47,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:44:47,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:44:47,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:44:46" (1/3) ... [2021-11-03 05:44:47,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f68f79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:44:47, skipping insertion in model container [2021-11-03 05:44:47,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:46" (2/3) ... [2021-11-03 05:44:47,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f68f79b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:44:47, skipping insertion in model container [2021-11-03 05:44:47,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:44:47" (3/3) ... [2021-11-03 05:44:47,367 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2021-11-03 05:44:47,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:44:47,388 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:44:47,450 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:44:47,457 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:44:47,457 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:44:47,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:44:47,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:47,475 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:44:47,476 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:44:47,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:47,488 INFO L85 PathProgramCache]: Analyzing trace with hash 58046, now seen corresponding path program 1 times [2021-11-03 05:44:47,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:44:47,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099285728] [2021-11-03 05:44:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:47,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:44:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:44:47,646 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 05:44:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:44:47,712 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 05:44:47,715 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 05:44:47,716 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:44:47,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:44:47,723 INFO L731 BasicCegarLoop]: Path program histogram: [1] [2021-11-03 05:44:47,726 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 05:44:47,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 05:44:47 BoogieIcfgContainer [2021-11-03 05:44:47,757 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 05:44:47,761 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 05:44:47,761 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 05:44:47,761 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 05:44:47,762 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:44:47" (3/4) ... [2021-11-03 05:44:47,765 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-03 05:44:47,765 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 05:44:47,769 INFO L168 Benchmark]: Toolchain (without parser) took 1153.62 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 53.6 MB in the beginning and 84.5 MB in the end (delta: -30.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:44:47,770 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 88.1 MB. Free memory was 61.0 MB in the beginning and 60.9 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:44:47,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.21 ms. Allocated memory is still 88.1 MB. Free memory was 53.4 MB in the beginning and 64.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:44:47,772 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.03 ms. Allocated memory is still 88.1 MB. Free memory was 64.3 MB in the beginning and 63.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:44:47,773 INFO L168 Benchmark]: Boogie Preprocessor took 33.33 ms. Allocated memory is still 88.1 MB. Free memory was 62.6 MB in the beginning and 61.9 MB in the end (delta: 712.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:44:47,774 INFO L168 Benchmark]: RCFGBuilder took 387.92 ms. Allocated memory is still 88.1 MB. Free memory was 61.9 MB in the beginning and 49.7 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:44:47,781 INFO L168 Benchmark]: TraceAbstraction took 410.61 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 49.4 MB in the beginning and 84.8 MB in the end (delta: -35.5 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:44:47,782 INFO L168 Benchmark]: Witness Printer took 5.11 ms. Allocated memory is still 107.0 MB. Free memory was 84.8 MB in the beginning and 84.5 MB in the end (delta: 326.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:44:47,790 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 88.1 MB. Free memory was 61.0 MB in the beginning and 60.9 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 271.21 ms. Allocated memory is still 88.1 MB. Free memory was 53.4 MB in the beginning and 64.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.03 ms. Allocated memory is still 88.1 MB. Free memory was 64.3 MB in the beginning and 63.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.33 ms. Allocated memory is still 88.1 MB. Free memory was 62.6 MB in the beginning and 61.9 MB in the end (delta: 712.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 387.92 ms. Allocated memory is still 88.1 MB. Free memory was 61.9 MB in the beginning and 49.7 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 410.61 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 49.4 MB in the beginning and 84.8 MB in the end (delta: -35.5 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. * Witness Printer took 5.11 ms. Allocated memory is still 107.0 MB. Free memory was 84.8 MB in the beginning and 84.5 MB in the end (delta: 326.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 11]: 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 21. Possible FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L11] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-03 05:44:47,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/float_int_inv_square.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH --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 a3f1488b0e5756e8d9e219e50ec38e84e8e4fac76b2e3a5e1785d4e14d4111d8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:44:50,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:44:50,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:44:50,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:44:50,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:44:50,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:44:50,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:44:50,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:44:50,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:44:50,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:44:50,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:44:50,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:44:50,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:44:50,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:44:50,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:44:50,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:44:50,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:44:50,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:44:50,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:44:50,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:44:50,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:44:50,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:44:50,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:44:50,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:44:50,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:44:50,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:44:50,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:44:50,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:44:50,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:44:50,384 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:44:50,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:44:50,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:44:50,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:44:50,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:44:50,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:44:50,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:44:50,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:44:50,401 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:44:50,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:44:50,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:44:50,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:44:50,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:44:50,454 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:44:50,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:44:50,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:44:50,456 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:44:50,457 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:44:50,457 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:44:50,457 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:44:50,457 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:44:50,457 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:44:50,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:44:50,460 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:44:50,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:44:50,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:44:50,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:44:50,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:44:50,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:44:50,462 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:44:50,462 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:44:50,462 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:44:50,462 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:44:50,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:44:50,463 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:44:50,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:44:50,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:44:50,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:44:50,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:44:50,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:44:50,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:44:50,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:44:50,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:44:50,465 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:44:50,465 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:44:50,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:44:50,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:44:50,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:44:50,466 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_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3f1488b0e5756e8d9e219e50ec38e84e8e4fac76b2e3a5e1785d4e14d4111d8 [2021-11-03 05:44:50,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:44:50,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:44:50,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:44:50,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:44:50,853 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:44:50,854 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-11-03 05:44:50,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/data/924ee3675/f8fcc6b321e7458f9408aa40ee59a07a/FLAG552c36975 [2021-11-03 05:44:51,527 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:44:51,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-11-03 05:44:51,536 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/data/924ee3675/f8fcc6b321e7458f9408aa40ee59a07a/FLAG552c36975 [2021-11-03 05:44:51,976 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/data/924ee3675/f8fcc6b321e7458f9408aa40ee59a07a [2021-11-03 05:44:51,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:44:51,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:44:51,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:44:51,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:44:51,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:44:51,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:44:51" (1/1) ... [2021-11-03 05:44:51,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f82c01e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:51, skipping insertion in model container [2021-11-03 05:44:51,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:44:51" (1/1) ... [2021-11-03 05:44:51,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:44:52,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:44:52,184 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_3402afcd-8cfc-4ea9-ab32-0560c5197f60/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-11-03 05:44:52,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:44:52,208 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:44:52,219 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_3402afcd-8cfc-4ea9-ab32-0560c5197f60/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-11-03 05:44:52,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:44:52,237 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:44:52,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52 WrapperNode [2021-11-03 05:44:52,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:44:52,239 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:44:52,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:44:52,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:44:52,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52" (1/1) ... [2021-11-03 05:44:52,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52" (1/1) ... [2021-11-03 05:44:52,274 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:44:52,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:44:52,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:44:52,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:44:52,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52" (1/1) ... [2021-11-03 05:44:52,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52" (1/1) ... [2021-11-03 05:44:52,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52" (1/1) ... [2021-11-03 05:44:52,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52" (1/1) ... [2021-11-03 05:44:52,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52" (1/1) ... [2021-11-03 05:44:52,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52" (1/1) ... [2021-11-03 05:44:52,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52" (1/1) ... [2021-11-03 05:44:52,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:44:52,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:44:52,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:44:52,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:44:52,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52" (1/1) ... [2021-11-03 05:44:52,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:44:52,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:44:52,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:44:52,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:44:52,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:44:52,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:44:52,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:44:52,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:44:53,746 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:44:53,747 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-03 05:44:53,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:44:53 BoogieIcfgContainer [2021-11-03 05:44:53,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:44:53,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:44:53,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:44:53,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:44:53,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:44:51" (1/3) ... [2021-11-03 05:44:53,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175e1530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:44:53, skipping insertion in model container [2021-11-03 05:44:53,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:44:52" (2/3) ... [2021-11-03 05:44:53,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@175e1530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:44:53, skipping insertion in model container [2021-11-03 05:44:53,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:44:53" (3/3) ... [2021-11-03 05:44:53,758 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2021-11-03 05:44:53,763 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:44:53,763 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:44:53,809 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:44:53,815 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:44:53,816 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:44:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:44:53,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:53,834 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:44:53,835 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:44:53,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2021-11-03 05:44:53,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:44:53,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014596281] [2021-11-03 05:44:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:53,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:44:53,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:44:53,873 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:44:53,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:44:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:44:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:44:54,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:44:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:54,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:44:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:44:54,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:44:54,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014596281] [2021-11-03 05:44:54,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014596281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:44:54,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:44:54,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:44:54,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472881688] [2021-11-03 05:44:54,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:44:54,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:44:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:44:54,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:44:54,150 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:44:54,163 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-11-03 05:44:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:44:54,165 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 05:44:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:44:54,172 INFO L225 Difference]: With dead ends: 19 [2021-11-03 05:44:54,172 INFO L226 Difference]: Without dead ends: 7 [2021-11-03 05:44:54,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:44:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-11-03 05:44:54,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-11-03 05:44:54,201 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) [2021-11-03 05:44:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-11-03 05:44:54,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-11-03 05:44:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:44:54,203 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-11-03 05:44:54,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:44:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-11-03 05:44:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:44:54,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:44:54,204 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:44:54,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:44:54,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:44:54,423 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:44:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:44:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2021-11-03 05:44:54,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:44:54,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837059900] [2021-11-03 05:44:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:44:54,440 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:44:54,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:44:54,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:44:54,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:44:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:44:54,570 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 05:44:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:44:54,729 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-03 05:44:54,729 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 05:44:54,731 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:44:54,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:44:54,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:44:54,946 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-03 05:44:54,948 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 05:44:54,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 05:44:54 BoogieIcfgContainer [2021-11-03 05:44:54,974 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 05:44:54,975 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 05:44:54,975 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 05:44:54,975 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 05:44:54,976 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:44:53" (3/4) ... [2021-11-03 05:44:54,978 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-03 05:44:55,030 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 05:44:55,031 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 05:44:55,034 INFO L168 Benchmark]: Toolchain (without parser) took 3051.32 ms. Allocated memory is still 67.1 MB. Free memory was 49.4 MB in the beginning and 44.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2021-11-03 05:44:55,037 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 67.1 MB. Free memory was 48.1 MB in the beginning and 48.0 MB in the end (delta: 54.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:44:55,042 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.52 ms. Allocated memory is still 67.1 MB. Free memory was 49.3 MB in the beginning and 39.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:44:55,043 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.77 ms. Allocated memory is still 67.1 MB. Free memory was 39.2 MB in the beginning and 37.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:44:55,044 INFO L168 Benchmark]: Boogie Preprocessor took 25.56 ms. Allocated memory is still 67.1 MB. Free memory was 37.7 MB in the beginning and 36.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:44:55,045 INFO L168 Benchmark]: RCFGBuilder took 1447.98 ms. Allocated memory is still 67.1 MB. Free memory was 36.6 MB in the beginning and 46.5 MB in the end (delta: -9.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2021-11-03 05:44:55,045 INFO L168 Benchmark]: TraceAbstraction took 1223.15 ms. Allocated memory is still 67.1 MB. Free memory was 46.0 MB in the beginning and 45.9 MB in the end (delta: 79.6 kB). Peak memory consumption was 997.2 kB. Max. memory is 16.1 GB. [2021-11-03 05:44:55,046 INFO L168 Benchmark]: Witness Printer took 56.79 ms. Allocated memory is still 67.1 MB. Free memory was 45.6 MB in the beginning and 44.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:44:55,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 67.1 MB. Free memory was 48.1 MB in the beginning and 48.0 MB in the end (delta: 54.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.52 ms. Allocated memory is still 67.1 MB. Free memory was 49.3 MB in the beginning and 39.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.77 ms. Allocated memory is still 67.1 MB. Free memory was 39.2 MB in the beginning and 37.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.56 ms. Allocated memory is still 67.1 MB. Free memory was 37.7 MB in the beginning and 36.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1447.98 ms. Allocated memory is still 67.1 MB. Free memory was 36.6 MB in the beginning and 46.5 MB in the end (delta: -9.9 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1223.15 ms. Allocated memory is still 67.1 MB. Free memory was 46.0 MB in the beginning and 45.9 MB in the end (delta: 79.6 kB). Peak memory consumption was 997.2 kB. Max. memory is 16.1 GB. * Witness Printer took 56.79 ms. Allocated memory is still 67.1 MB. Free memory was 45.6 MB in the beginning and 44.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L11] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 31 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-03 05:44:55,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3402afcd-8cfc-4ea9-ab32-0560c5197f60/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE