./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/inv_square-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 052b65435ce93a43ae641d125fc7546191d1b08e ................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/inv_square-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 052b65435ce93a43ae641d125fc7546191d1b08e ........................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:21:05,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:21:05,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:21:05,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:21:05,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:21:05,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:21:05,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:21:05,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:21:05,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:21:05,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:21:05,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:21:05,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:21:05,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:21:05,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:21:05,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:21:05,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:21:05,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:21:05,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:21:05,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:21:05,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:21:05,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:21:05,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:21:05,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:21:05,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:21:05,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:21:05,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:21:05,254 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:21:05,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:21:05,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:21:05,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:21:05,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:21:05,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:21:05,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:21:05,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:21:05,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:21:05,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:21:05,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:21:05,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:21:05,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:21:05,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:21:05,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:21:05,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:21:05,296 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:21:05,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:21:05,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:21:05,298 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:21:05,298 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:21:05,298 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:21:05,298 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:21:05,298 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:21:05,299 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:21:05,299 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:21:05,299 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:21:05,299 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:21:05,300 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:21:05,300 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:21:05,300 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:21:05,301 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:21:05,301 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:21:05,301 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:21:05,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:21:05,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:21:05,302 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:21:05,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:21:05,302 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:21:05,302 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:21:05,302 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:21:05,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:21:05,303 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:21:05,303 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:21:05,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:21:05,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:21:05,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:05,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:21:05,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:21:05,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:21:05,305 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:21:05,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:21:05,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:21:05,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:21:05,305 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:21:05,306 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_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2021-10-11 02:21:05,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:21:05,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:21:05,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:21:05,595 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:21:05,596 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:21:05,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-benchs/inv_square-2.c [2021-10-11 02:21:05,662 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/data/250fc5b93/c72428cb2e9942c3a44eb5b45ef2c518/FLAG63f217a0c [2021-10-11 02:21:06,149 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:21:06,150 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/sv-benchmarks/c/float-benchs/inv_square-2.c [2021-10-11 02:21:06,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/data/250fc5b93/c72428cb2e9942c3a44eb5b45ef2c518/FLAG63f217a0c [2021-10-11 02:21:06,532 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/data/250fc5b93/c72428cb2e9942c3a44eb5b45ef2c518 [2021-10-11 02:21:06,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:21:06,536 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:21:06,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:06,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:21:06,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:21:06,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:06" (1/1) ... [2021-10-11 02:21:06,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5abff30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06, skipping insertion in model container [2021-10-11 02:21:06,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:06" (1/1) ... [2021-10-11 02:21:06,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:21:06,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:21:06,775 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2021-10-11 02:21:06,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:06,810 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:21:06,819 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2021-10-11 02:21:06,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:06,833 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:21:06,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06 WrapperNode [2021-10-11 02:21:06,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:06,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:06,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:21:06,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:21:06,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06" (1/1) ... [2021-10-11 02:21:06,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06" (1/1) ... [2021-10-11 02:21:06,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:06,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:21:06,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:21:06,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:21:06,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06" (1/1) ... [2021-10-11 02:21:06,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06" (1/1) ... [2021-10-11 02:21:06,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06" (1/1) ... [2021-10-11 02:21:06,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06" (1/1) ... [2021-10-11 02:21:06,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06" (1/1) ... [2021-10-11 02:21:06,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06" (1/1) ... [2021-10-11 02:21:06,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06" (1/1) ... [2021-10-11 02:21:06,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:21:06,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:21:06,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:21:06,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:21:06,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:06,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:21:06,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:21:06,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:21:06,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:21:07,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:21:07,260 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:21:07,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:07 BoogieIcfgContainer [2021-10-11 02:21:07,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:21:07,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:21:07,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:21:07,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:21:07,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:21:06" (1/3) ... [2021-10-11 02:21:07,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89c8f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:07, skipping insertion in model container [2021-10-11 02:21:07,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:06" (2/3) ... [2021-10-11 02:21:07,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@89c8f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:07, skipping insertion in model container [2021-10-11 02:21:07,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:07" (3/3) ... [2021-10-11 02:21:07,284 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2021-10-11 02:21:07,304 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:21:07,310 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:21:07,322 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:21:07,376 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:21:07,376 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:21:07,377 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:21:07,377 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:21:07,377 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:21:07,377 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:21:07,377 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:21:07,377 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:21:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2021-10-11 02:21:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:21:07,406 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:07,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:21:07,407 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:07,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:07,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1947436, now seen corresponding path program 1 times [2021-10-11 02:21:07,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:07,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533087834] [2021-10-11 02:21:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:21:07,605 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:21:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:21:07,646 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:21:07,686 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:21:07,686 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:21:07,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:21:07,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:21:07 BoogieIcfgContainer [2021-10-11 02:21:07,707 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:21:07,709 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:21:07,711 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:21:07,712 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:21:07,712 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:07" (3/4) ... [2021-10-11 02:21:07,715 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:21:07,725 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:21:07,728 INFO L168 Benchmark]: Toolchain (without parser) took 1190.80 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 73.2 MB in the beginning and 96.9 MB in the end (delta: -23.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:07,728 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory is still 58.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:07,729 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.98 ms. Allocated memory is still 100.7 MB. Free memory was 73.0 MB in the beginning and 76.9 MB in the end (delta: -3.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:07,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.88 ms. Allocated memory is still 100.7 MB. Free memory was 76.9 MB in the beginning and 75.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:07,731 INFO L168 Benchmark]: Boogie Preprocessor took 21.24 ms. Allocated memory is still 100.7 MB. Free memory was 75.5 MB in the beginning and 74.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:07,732 INFO L168 Benchmark]: RCFGBuilder took 372.96 ms. Allocated memory is still 100.7 MB. Free memory was 74.4 MB in the beginning and 59.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:07,733 INFO L168 Benchmark]: TraceAbstraction took 442.63 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 59.3 MB in the beginning and 97.4 MB in the end (delta: -38.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:07,733 INFO L168 Benchmark]: Witness Printer took 16.92 ms. Allocated memory is still 121.6 MB. Free memory was 97.4 MB in the beginning and 96.9 MB in the end (delta: 499.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:07,738 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 100.7 MB. Free memory is still 58.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.98 ms. Allocated memory is still 100.7 MB. Free memory was 73.0 MB in the beginning and 76.9 MB in the end (delta: -3.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.88 ms. Allocated memory is still 100.7 MB. Free memory was 76.9 MB in the beginning and 75.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.24 ms. Allocated memory is still 100.7 MB. Free memory was 75.5 MB in the beginning and 74.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 372.96 ms. Allocated memory is still 100.7 MB. Free memory was 74.4 MB in the beginning and 59.7 MB in the end (delta: 14.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 442.63 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 59.3 MB in the beginning and 97.4 MB in the end (delta: -38.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 16.92 ms. Allocated memory is still 121.6 MB. Free memory was 97.4 MB in the beginning and 96.9 MB in the end (delta: 499.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 23. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x <= -1e-20f || x >= 1e-20f [L23] y = x * x [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 8 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:21:10,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:21:10,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:21:10,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:21:10,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:21:10,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:21:10,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:21:10,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:21:10,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:21:10,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:21:10,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:21:10,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:21:10,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:21:10,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:21:10,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:21:10,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:21:10,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:21:10,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:21:10,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:21:10,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:21:10,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:21:10,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:21:10,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:21:10,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:21:10,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:21:10,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:21:10,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:21:10,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:21:10,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:21:10,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:21:10,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:21:10,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:21:10,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:21:10,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:21:10,507 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:21:10,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:21:10,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:21:10,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:21:10,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:21:10,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:21:10,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:21:10,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:21:10,562 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:21:10,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:21:10,563 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:21:10,563 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:21:10,564 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:21:10,564 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:21:10,564 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:21:10,565 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:21:10,565 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:21:10,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:21:10,566 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:21:10,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:21:10,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:21:10,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:21:10,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:21:10,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:21:10,568 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:21:10,568 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:21:10,568 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:21:10,568 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:21:10,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:21:10,569 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:21:10,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:21:10,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:21:10,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:21:10,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:21:10,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:10,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:21:10,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:21:10,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:21:10,571 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:21:10,572 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:21:10,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:21:10,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:21:10,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:21:10,573 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_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 052b65435ce93a43ae641d125fc7546191d1b08e [2021-10-11 02:21:10,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:21:11,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:21:11,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:21:11,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:21:11,021 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:21:11,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/float-benchs/inv_square-2.c [2021-10-11 02:21:11,107 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/data/c93dc4cc4/ff83cb772abf4e9dbf7a0d2608b503fd/FLAG87aa6ef77 [2021-10-11 02:21:11,695 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:21:11,695 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/sv-benchmarks/c/float-benchs/inv_square-2.c [2021-10-11 02:21:11,702 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/data/c93dc4cc4/ff83cb772abf4e9dbf7a0d2608b503fd/FLAG87aa6ef77 [2021-10-11 02:21:12,049 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/data/c93dc4cc4/ff83cb772abf4e9dbf7a0d2608b503fd [2021-10-11 02:21:12,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:21:12,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:21:12,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:12,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:21:12,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:21:12,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:12" (1/1) ... [2021-10-11 02:21:12,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e1af2eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12, skipping insertion in model container [2021-10-11 02:21:12,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:12" (1/1) ... [2021-10-11 02:21:12,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:21:12,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:21:12,256 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2021-10-11 02:21:12,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:12,302 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:21:12,352 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/sv-benchmarks/c/float-benchs/inv_square-2.c[484,497] [2021-10-11 02:21:12,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:12,401 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:21:12,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12 WrapperNode [2021-10-11 02:21:12,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:12,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:12,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:21:12,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:21:12,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12" (1/1) ... [2021-10-11 02:21:12,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12" (1/1) ... [2021-10-11 02:21:12,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:12,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:21:12,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:21:12,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:21:12,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12" (1/1) ... [2021-10-11 02:21:12,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12" (1/1) ... [2021-10-11 02:21:12,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12" (1/1) ... [2021-10-11 02:21:12,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12" (1/1) ... [2021-10-11 02:21:12,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12" (1/1) ... [2021-10-11 02:21:12,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12" (1/1) ... [2021-10-11 02:21:12,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12" (1/1) ... [2021-10-11 02:21:12,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:21:12,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:21:12,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:21:12,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:21:12,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:12,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:21:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:21:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:21:12,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:21:14,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:21:14,448 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:21:14,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:14 BoogieIcfgContainer [2021-10-11 02:21:14,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:21:14,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:21:14,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:21:14,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:21:14,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:21:12" (1/3) ... [2021-10-11 02:21:14,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1356b7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:14, skipping insertion in model container [2021-10-11 02:21:14,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:12" (2/3) ... [2021-10-11 02:21:14,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1356b7ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:14, skipping insertion in model container [2021-10-11 02:21:14,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:14" (3/3) ... [2021-10-11 02:21:14,459 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-2.c [2021-10-11 02:21:14,475 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:21:14,478 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:21:14,490 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:21:14,516 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:21:14,516 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:21:14,517 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:21:14,517 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:21:14,517 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:21:14,517 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:21:14,517 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:21:14,518 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:21:14,532 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-10-11 02:21:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:21:14,537 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:14,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:21:14,539 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:14,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2021-10-11 02:21:14,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:21:14,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79892917] [2021-10-11 02:21:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:21:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:21:14,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:14,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:21:14,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79892917] [2021-10-11 02:21:14,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:14,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:21:14,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669701192] [2021-10-11 02:21:14,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:21:14,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:21:14,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:21:14,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:21:14,842 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-10-11 02:21:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:14,859 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:21:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:21:14,860 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 02:21:14,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:14,869 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:21:14,870 INFO L226 Difference]: Without dead ends: 7 [2021-10-11 02:21:14,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:21:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-11 02:21:14,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-11 02:21:14,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 02:21:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-11 02:21:14,911 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-10-11 02:21:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:14,912 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-11 02:21:14,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:21:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-11 02:21:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:21:14,913 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:14,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:21:15,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:21:15,124 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:15,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:15,125 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2021-10-11 02:21:15,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:21:15,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682206501] [2021-10-11 02:21:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:21:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:15,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:21:15,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:15,490 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:21:15,494 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:21:16,436 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:21:17,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:17,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:21:17,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682206501] [2021-10-11 02:21:17,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:17,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:21:17,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354675630] [2021-10-11 02:21:17,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:21:17,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:21:17,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:21:17,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:21:17,279 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 6 states. [2021-10-11 02:21:17,804 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-10-11 02:21:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:17,806 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2021-10-11 02:21:17,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:21:17,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2021-10-11 02:21:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:17,807 INFO L225 Difference]: With dead ends: 7 [2021-10-11 02:21:17,807 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:21:17,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:21:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:21:17,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:21:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:21:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:21:17,809 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2021-10-11 02:21:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:17,810 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:21:17,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:21:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:21:17,810 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:21:18,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:21:18,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:21:18,044 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:21:18,045 INFO L265 CegarLoopResult]: At program point L27(lines 15 28) the Hoare annotation is: true [2021-10-11 02:21:18,045 INFO L262 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2021-10-11 02:21:18,045 INFO L262 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-10-11 02:21:18,045 INFO L262 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2021-10-11 02:21:18,045 INFO L265 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: true [2021-10-11 02:21:18,046 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-11 02:21:18,046 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:21:18,046 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-11 02:21:18,046 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-10-11 02:21:18,046 INFO L262 CegarLoopResult]: For program point L22-1(lines 22 26) no Hoare annotation was computed. [2021-10-11 02:21:18,046 INFO L262 CegarLoopResult]: For program point L10(lines 22 26) no Hoare annotation was computed. [2021-10-11 02:21:18,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:21:18 BoogieIcfgContainer [2021-10-11 02:21:18,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:21:18,055 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:21:18,055 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:21:18,055 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:21:18,056 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:14" (3/4) ... [2021-10-11 02:21:18,059 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:21:18,069 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-11 02:21:18,070 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 02:21:18,070 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:21:18,070 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:21:18,110 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c316c037-f96f-4ae3-a2bc-2346554e9321/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:21:18,110 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:21:18,111 INFO L168 Benchmark]: Toolchain (without parser) took 6054.34 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 49.4 MB in the beginning and 46.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:18,112 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 69.2 MB. Free memory is still 49.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:18,113 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.27 ms. Allocated memory is still 69.2 MB. Free memory was 49.1 MB in the beginning and 52.3 MB in the end (delta: -3.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:18,113 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.82 ms. Allocated memory is still 69.2 MB. Free memory was 52.3 MB in the beginning and 50.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:18,114 INFO L168 Benchmark]: Boogie Preprocessor took 49.02 ms. Allocated memory is still 69.2 MB. Free memory was 50.7 MB in the beginning and 49.7 MB in the end (delta: 985.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:18,115 INFO L168 Benchmark]: RCFGBuilder took 1957.97 ms. Allocated memory is still 69.2 MB. Free memory was 49.6 MB in the beginning and 37.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:18,116 INFO L168 Benchmark]: TraceAbstraction took 3602.48 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 37.4 MB in the beginning and 48.9 MB in the end (delta: -11.6 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:18,117 INFO L168 Benchmark]: Witness Printer took 55.16 ms. Allocated memory is still 83.9 MB. Free memory was 48.9 MB in the beginning and 46.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:18,121 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 69.2 MB. Free memory is still 49.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 344.27 ms. Allocated memory is still 69.2 MB. Free memory was 49.1 MB in the beginning and 52.3 MB in the end (delta: -3.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.82 ms. Allocated memory is still 69.2 MB. Free memory was 52.3 MB in the beginning and 50.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.02 ms. Allocated memory is still 69.2 MB. Free memory was 50.7 MB in the beginning and 49.7 MB in the end (delta: 985.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1957.97 ms. Allocated memory is still 69.2 MB. Free memory was 49.6 MB in the beginning and 37.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3602.48 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 37.4 MB in the beginning and 48.9 MB in the end (delta: -11.6 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Witness Printer took 55.16 ms. Allocated memory is still 83.9 MB. Free memory was 48.9 MB in the beginning and 46.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 6 SDslu, 1 SDs, 0 SdLazy, 8 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 335 SizeOfPredicates, 6 NumberOfNonLiveVariables, 64 ConjunctsInSsa, 10 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 correct! Received shutdown request...