./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/square_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:23:44,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:23:44,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:23:44,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:23:44,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:23:44,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:23:44,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:23:44,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:23:44,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:23:44,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:23:44,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:23:44,237 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:23:44,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:23:44,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:23:44,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:23:44,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:23:44,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:23:44,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:23:44,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:23:44,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:23:44,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:23:44,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:23:44,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:23:44,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:23:44,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:23:44,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:23:44,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:23:44,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:23:44,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:23:44,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:23:44,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:23:44,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:23:44,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:23:44,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:23:44,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:23:44,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:23:44,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:23:44,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:23:44,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:23:44,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:23:44,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:23:44,290 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:23:44,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:23:44,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:23:44,332 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:23:44,333 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:23:44,334 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:23:44,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:23:44,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:23:44,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:23:44,335 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:23:44,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:23:44,337 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:23:44,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:23:44,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:23:44,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:23:44,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:23:44,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:23:44,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:23:44,338 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:23:44,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:23:44,339 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:23:44,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:23:44,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:23:44,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:23:44,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:23:44,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:23:44,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:23:44,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:23:44,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:23:44,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:23:44,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:23:44,342 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:23:44,342 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:23:44,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:23:44,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 [2022-11-20 12:23:44,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:23:44,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:23:44,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:23:44,714 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:23:44,714 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:23:44,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/floats-cdfpl/square_4.i [2022-11-20 12:23:48,568 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:23:48,775 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:23:48,776 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/sv-benchmarks/c/floats-cdfpl/square_4.i [2022-11-20 12:23:48,784 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/data/b6c02f937/87cb212007a148a2827c67c8f8319311/FLAG81db82a09 [2022-11-20 12:23:48,801 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/data/b6c02f937/87cb212007a148a2827c67c8f8319311 [2022-11-20 12:23:48,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:23:48,806 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:23:48,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:23:48,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:23:48,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:23:48,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:23:48" (1/1) ... [2022-11-20 12:23:48,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31273e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:48, skipping insertion in model container [2022-11-20 12:23:48,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:23:48" (1/1) ... [2022-11-20 12:23:48,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:23:48,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:23:49,038 WARN L237 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_697bf033-f808-48c9-8785-b77ab9c97e60/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2022-11-20 12:23:49,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:23:49,063 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:23:49,085 WARN L237 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_697bf033-f808-48c9-8785-b77ab9c97e60/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2022-11-20 12:23:49,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:23:49,101 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:23:49,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49 WrapperNode [2022-11-20 12:23:49,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:23:49,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:23:49,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:23:49,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:23:49,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (1/1) ... [2022-11-20 12:23:49,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (1/1) ... [2022-11-20 12:23:49,144 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2022-11-20 12:23:49,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:23:49,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:23:49,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:23:49,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:23:49,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (1/1) ... [2022-11-20 12:23:49,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (1/1) ... [2022-11-20 12:23:49,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (1/1) ... [2022-11-20 12:23:49,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (1/1) ... [2022-11-20 12:23:49,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (1/1) ... [2022-11-20 12:23:49,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (1/1) ... [2022-11-20 12:23:49,166 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (1/1) ... [2022-11-20 12:23:49,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (1/1) ... [2022-11-20 12:23:49,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:23:49,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:23:49,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:23:49,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:23:49,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (1/1) ... [2022-11-20 12:23:49,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:23:49,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:23:49,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:23:49,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:23:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:23:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:23:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:23:49,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:23:49,332 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:23:49,333 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:23:49,442 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:23:49,449 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:23:49,449 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 12:23:49,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:23:49 BoogieIcfgContainer [2022-11-20 12:23:49,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:23:49,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:23:49,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:23:49,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:23:49,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:23:48" (1/3) ... [2022-11-20 12:23:49,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10efa418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:23:49, skipping insertion in model container [2022-11-20 12:23:49,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:49" (2/3) ... [2022-11-20 12:23:49,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10efa418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:23:49, skipping insertion in model container [2022-11-20 12:23:49,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:23:49" (3/3) ... [2022-11-20 12:23:49,464 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4.i [2022-11-20 12:23:49,489 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:23:49,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:23:49,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:23:49,561 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2abff630, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:23:49,562 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:23:49,567 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) [2022-11-20 12:23:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:23:49,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:23:49,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:23:49,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:23:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:23:49,581 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2022-11-20 12:23:49,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:23:49,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690795949] [2022-11-20 12:23:49,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:23:49,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:23:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:23:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:23:49,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:23:49,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690795949] [2022-11-20 12:23:49,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690795949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:23:49,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:23:49,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:23:49,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145026729] [2022-11-20 12:23:49,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:23:49,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:23:49,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:23:49,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:23:49,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:23:49,852 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) [2022-11-20 12:23:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:23:49,869 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-20 12:23:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:23:49,872 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 [2022-11-20 12:23:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:23:49,882 INFO L225 Difference]: With dead ends: 19 [2022-11-20 12:23:49,882 INFO L226 Difference]: Without dead ends: 7 [2022-11-20 12:23:49,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:23:49,891 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:23:49,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:23:49,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-11-20 12:23:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-11-20 12:23:49,924 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) [2022-11-20 12:23:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-11-20 12:23:49,926 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2022-11-20 12:23:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:23:49,927 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-11-20 12:23:49,927 INFO L496 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) [2022-11-20 12:23:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-11-20 12:23:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:23:49,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:23:49,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:23:49,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:23:49,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:23:49,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:23:49,930 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2022-11-20 12:23:49,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:23:49,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086083141] [2022-11-20 12:23:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:23:49,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:23:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:23:49,955 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 12:23:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 12:23:49,990 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 12:23:49,991 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 12:23:49,993 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 12:23:49,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:23:50,000 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 12:23:50,005 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 12:23:50,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 12:23:50 BoogieIcfgContainer [2022-11-20 12:23:50,029 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 12:23:50,030 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 12:23:50,030 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 12:23:50,031 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 12:23:50,031 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:23:49" (3/4) ... [2022-11-20 12:23:50,034 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-20 12:23:50,034 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 12:23:50,035 INFO L158 Benchmark]: Toolchain (without parser) took 1228.89ms. Allocated memory was 157.3MB in the beginning and 203.4MB in the end (delta: 46.1MB). Free memory was 112.8MB in the beginning and 162.7MB in the end (delta: -49.9MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:23:50,036 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 96.5MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:23:50,036 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.74ms. Allocated memory is still 157.3MB. Free memory was 112.4MB in the beginning and 102.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 12:23:50,037 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.85ms. Allocated memory is still 157.3MB. Free memory was 102.3MB in the beginning and 101.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 12:23:50,038 INFO L158 Benchmark]: Boogie Preprocessor took 23.81ms. Allocated memory is still 157.3MB. Free memory was 101.0MB in the beginning and 99.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:23:50,038 INFO L158 Benchmark]: RCFGBuilder took 282.29ms. Allocated memory is still 157.3MB. Free memory was 99.8MB in the beginning and 91.0MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 12:23:50,039 INFO L158 Benchmark]: TraceAbstraction took 573.86ms. Allocated memory was 157.3MB in the beginning and 203.4MB in the end (delta: 46.1MB). Free memory was 90.6MB in the beginning and 162.7MB in the end (delta: -72.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:23:50,039 INFO L158 Benchmark]: Witness Printer took 4.45ms. Allocated memory is still 203.4MB. Free memory is still 162.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 12:23:50,042 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 96.5MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.74ms. Allocated memory is still 157.3MB. Free memory was 112.4MB in the beginning and 102.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.85ms. Allocated memory is still 157.3MB. Free memory was 102.3MB in the beginning and 101.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.81ms. Allocated memory is still 157.3MB. Free memory was 101.0MB in the beginning and 99.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 282.29ms. Allocated memory is still 157.3MB. Free memory was 99.8MB in the beginning and 91.0MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 573.86ms. Allocated memory was 157.3MB in the beginning and 203.4MB in the end (delta: 46.1MB). Free memory was 90.6MB in the beginning and 162.7MB in the end (delta: -72.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 4.45ms. Allocated memory is still 203.4MB. Free memory is still 162.7MB. There was no memory consumed. Max. memory is 16.1GB. * 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: 38]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 37, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L29] float IN = __VERIFIER_nondet_float(); [L30] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L24] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L30] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L32] float x = IN; [L34-L35] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=53, x=53] [L37] COND TRUE !(result >= 0.0f && result < 1.39844f) VAL [IN=53, x=53] [L38] reach_error() VAL [IN=53, x=53] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 10 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 10 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=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, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-20 12:23:50,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 12:23:52,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:23:52,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:23:52,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:23:52,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:23:52,958 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:23:52,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:23:52,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:23:52,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:23:52,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:23:52,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:23:52,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:23:52,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:23:52,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:23:52,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:23:52,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:23:52,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:23:52,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:23:52,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:23:52,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:23:52,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:23:52,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:23:52,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:23:52,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:23:52,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:23:52,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:23:52,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:23:52,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:23:52,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:23:52,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:23:52,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:23:52,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:23:52,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:23:53,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:23:53,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:23:53,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:23:53,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:23:53,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:23:53,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:23:53,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:23:53,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:23:53,030 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-20 12:23:53,082 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:23:53,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:23:53,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:23:53,087 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:23:53,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:23:53,089 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:23:53,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:23:53,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:23:53,090 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:23:53,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:23:53,092 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:23:53,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:23:53,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:23:53,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:23:53,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:23:53,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:23:53,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 12:23:53,095 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 12:23:53,095 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 12:23:53,096 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:23:53,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:23:53,097 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:23:53,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:23:53,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:23:53,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:23:53,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:23:53,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:23:53,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:23:53,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:23:53,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:23:53,100 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 12:23:53,100 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 12:23:53,101 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:23:53,101 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:23:53,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:23:53,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 12:23:53,102 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_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a48c5cd45981ad19c66d741a4ad9a0eb2d2fb135a3f4c24edf8153a131c05f3 [2022-11-20 12:23:53,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:23:53,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:23:53,612 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:23:53,614 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:23:53,615 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:23:53,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/floats-cdfpl/square_4.i [2022-11-20 12:23:57,230 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:23:57,477 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:23:57,478 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/sv-benchmarks/c/floats-cdfpl/square_4.i [2022-11-20 12:23:57,486 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/data/11c75b539/e6a91ac0e0b149a3a71e0d0a35107e92/FLAG96e53cf35 [2022-11-20 12:23:57,510 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/data/11c75b539/e6a91ac0e0b149a3a71e0d0a35107e92 [2022-11-20 12:23:57,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:23:57,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:23:57,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:23:57,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:23:57,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:23:57,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@271641d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57, skipping insertion in model container [2022-11-20 12:23:57,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:23:57,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:23:57,745 WARN L237 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_697bf033-f808-48c9-8785-b77ab9c97e60/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2022-11-20 12:23:57,752 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:23:57,782 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:23:57,818 WARN L237 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_697bf033-f808-48c9-8785-b77ab9c97e60/sv-benchmarks/c/floats-cdfpl/square_4.i[1629,1642] [2022-11-20 12:23:57,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:23:57,852 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:23:57,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57 WrapperNode [2022-11-20 12:23:57,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:23:57,854 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:23:57,855 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:23:57,855 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:23:57,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,911 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2022-11-20 12:23:57,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:23:57,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:23:57,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:23:57,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:23:57,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,936 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,946 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:23:57,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:23:57,956 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:23:57,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:23:57,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (1/1) ... [2022-11-20 12:23:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:23:58,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:23:58,021 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:23:58,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:23:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:23:58,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 12:23:58,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:23:58,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:23:58,187 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:23:58,189 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:24:00,465 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:24:00,472 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:24:00,473 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 12:24:00,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:24:00 BoogieIcfgContainer [2022-11-20 12:24:00,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:24:00,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:24:00,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:24:00,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:24:00,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:23:57" (1/3) ... [2022-11-20 12:24:00,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4d7df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:24:00, skipping insertion in model container [2022-11-20 12:24:00,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:23:57" (2/3) ... [2022-11-20 12:24:00,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4d7df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:24:00, skipping insertion in model container [2022-11-20 12:24:00,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:24:00" (3/3) ... [2022-11-20 12:24:00,487 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4.i [2022-11-20 12:24:00,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:24:00,511 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:24:00,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:24:00,583 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5ac2ed89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:24:00,583 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 12:24:00,588 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) [2022-11-20 12:24:00,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:24:00,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:24:00,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:24:00,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:24:00,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:24:00,604 INFO L85 PathProgramCache]: Analyzing trace with hash 889508712, now seen corresponding path program 1 times [2022-11-20 12:24:00,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:24:00,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964700536] [2022-11-20 12:24:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:24:00,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:24:00,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:24:00,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 12:24:00,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 12:24:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:24:01,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 12:24:01,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:24:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:24:01,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:24:01,288 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 12:24:01,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964700536] [2022-11-20 12:24:01,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964700536] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:24:01,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:24:01,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:24:01,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11216365] [2022-11-20 12:24:01,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:24:01,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:24:01,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 12:24:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:24:01,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:24:01,342 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) [2022-11-20 12:24:01,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:24:01,360 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-11-20 12:24:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:24:01,363 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 [2022-11-20 12:24:01,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:24:01,373 INFO L225 Difference]: With dead ends: 19 [2022-11-20 12:24:01,374 INFO L226 Difference]: Without dead ends: 7 [2022-11-20 12:24:01,377 INFO L412 NwaCegarLoop]: 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 [2022-11-20 12:24:01,382 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:24:01,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:24:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-11-20 12:24:01,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-11-20 12:24:01,416 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) [2022-11-20 12:24:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2022-11-20 12:24:01,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2022-11-20 12:24:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:24:01,419 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2022-11-20 12:24:01,419 INFO L496 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) [2022-11-20 12:24:01,419 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2022-11-20 12:24:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:24:01,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:24:01,420 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:24:01,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:24:01,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:24:01,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:24:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:24:01,625 INFO L85 PathProgramCache]: Analyzing trace with hash 889568294, now seen corresponding path program 1 times [2022-11-20 12:24:01,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 12:24:01,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313638235] [2022-11-20 12:24:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:24:01,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 12:24:01,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 12:24:01,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 12:24:01,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697bf033-f808-48c9-8785-b77ab9c97e60/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process