./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/floats-cdfpl/square_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer --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 e4a477de7e338b2b004255d636f7482e0c252b22 ............................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/floats-cdfpl/square_2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer --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 e4a477de7e338b2b004255d636f7482e0c252b22 ........................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:12:31,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:12:31,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:12:32,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:12:32,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:12:32,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:12:32,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:12:32,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:12:32,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:12:32,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:12:32,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:12:32,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:12:32,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:12:32,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:12:32,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:12:32,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:12:32,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:12:32,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:12:32,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:12:32,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:12:32,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:12:32,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:12:32,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:12:32,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:12:32,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:12:32,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:12:32,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:12:32,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:12:32,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:12:32,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:12:32,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:12:32,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:12:32,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:12:32,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:12:32,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:12:32,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:12:32,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:12:32,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:12:32,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:12:32,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:12:32,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:12:32,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:12:32,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:12:32,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:12:32,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:12:32,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:12:32,197 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:12:32,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:12:32,197 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:12:32,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:12:32,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:12:32,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:12:32,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:12:32,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:12:32,200 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:12:32,200 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:12:32,200 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:12:32,201 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:12:32,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:12:32,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:12:32,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:12:32,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:12:32,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:12:32,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:12:32,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:12:32,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:12:32,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:12:32,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:12:32,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:12:32,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:12:32,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:12:32,204 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-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a477de7e338b2b004255d636f7482e0c252b22 [2020-11-30 01:12:32,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:12:32,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:12:32,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:12:32,607 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:12:32,608 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:12:32,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/../../sv-benchmarks/c/floats-cdfpl/square_2.i [2020-11-30 01:12:32,705 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/data/937b9ae34/cc6a4290ca804fbc8aab9a45e5468810/FLAG3848a637d [2020-11-30 01:12:33,212 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:12:33,212 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/sv-benchmarks/c/floats-cdfpl/square_2.i [2020-11-30 01:12:33,219 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/data/937b9ae34/cc6a4290ca804fbc8aab9a45e5468810/FLAG3848a637d [2020-11-30 01:12:33,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/data/937b9ae34/cc6a4290ca804fbc8aab9a45e5468810 [2020-11-30 01:12:33,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:12:33,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:12:33,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:12:33,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:12:33,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:12:33,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:12:33" (1/1) ... [2020-11-30 01:12:33,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b97b46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33, skipping insertion in model container [2020-11-30 01:12:33,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:12:33" (1/1) ... [2020-11-30 01:12:33,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:12:33,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:12:33,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:12:33,936 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:12:33,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:12:33,978 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:12:33,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33 WrapperNode [2020-11-30 01:12:33,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:12:33,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:12:33,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:12:33,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:12:33,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33" (1/1) ... [2020-11-30 01:12:33,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33" (1/1) ... [2020-11-30 01:12:34,014 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:12:34,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:12:34,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:12:34,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:12:34,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33" (1/1) ... [2020-11-30 01:12:34,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33" (1/1) ... [2020-11-30 01:12:34,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33" (1/1) ... [2020-11-30 01:12:34,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33" (1/1) ... [2020-11-30 01:12:34,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33" (1/1) ... [2020-11-30 01:12:34,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33" (1/1) ... [2020-11-30 01:12:34,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33" (1/1) ... [2020-11-30 01:12:34,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:12:34,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:12:34,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:12:34,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:12:34,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/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 [2020-11-30 01:12:34,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:12:34,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:12:34,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:12:34,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:12:34,335 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:12:34,336 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-30 01:12:34,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:12:34 BoogieIcfgContainer [2020-11-30 01:12:34,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:12:34,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:12:34,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:12:34,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:12:34,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:12:33" (1/3) ... [2020-11-30 01:12:34,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed04593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:12:34, skipping insertion in model container [2020-11-30 01:12:34,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:33" (2/3) ... [2020-11-30 01:12:34,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ed04593 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:12:34, skipping insertion in model container [2020-11-30 01:12:34,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:12:34" (3/3) ... [2020-11-30 01:12:34,347 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2020-11-30 01:12:34,359 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:12:34,364 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:12:34,379 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:12:34,408 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:12:34,408 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:12:34,408 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:12:34,408 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:12:34,409 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:12:34,409 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:12:34,409 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:12:34,409 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:12:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-30 01:12:34,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:12:34,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:12:34,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:12:34,429 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:12:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:12:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-11-30 01:12:34,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:12:34,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209002029] [2020-11-30 01:12:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:12:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:12:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:12:34,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209002029] [2020-11-30 01:12:34,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:12:34,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:12:34,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501114651] [2020-11-30 01:12:34,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:12:34,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:12:34,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:12:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:12:34,691 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-30 01:12:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:12:34,707 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-30 01:12:34,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:12:34,709 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-11-30 01:12:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:12:34,717 INFO L225 Difference]: With dead ends: 21 [2020-11-30 01:12:34,718 INFO L226 Difference]: Without dead ends: 8 [2020-11-30 01:12:34,721 INFO L677 BasicCegarLoop]: 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 [2020-11-30 01:12:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-30 01:12:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-30 01:12:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-30 01:12:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-11-30 01:12:34,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-11-30 01:12:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:12:34,759 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-11-30 01:12:34,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:12:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-11-30 01:12:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:12:34,760 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:12:34,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:12:34,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:12:34,761 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:12:34,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:12:34,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-11-30 01:12:34,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:12:34,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977136830] [2020-11-30 01:12:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:12:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:12:34,789 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:12:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:12:34,815 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:12:34,837 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:12:34,837 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:12:34,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:12:34,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:12:34 BoogieIcfgContainer [2020-11-30 01:12:34,862 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:12:34,863 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:12:34,863 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:12:34,863 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:12:34,864 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:12:34" (3/4) ... [2020-11-30 01:12:34,868 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 01:12:34,868 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:12:34,871 INFO L168 Benchmark]: Toolchain (without parser) took 1271.20 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 51.3 MB in the beginning and 73.8 MB in the end (delta: -22.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:12:34,872 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory is still 67.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:12:34,873 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.82 ms. Allocated memory is still 86.0 MB. Free memory was 51.1 MB in the beginning and 63.7 MB in the end (delta: -12.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-11-30 01:12:34,874 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.66 ms. Allocated memory is still 86.0 MB. Free memory was 63.7 MB in the beginning and 62.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:12:34,875 INFO L168 Benchmark]: Boogie Preprocessor took 32.41 ms. Allocated memory is still 86.0 MB. Free memory was 62.2 MB in the beginning and 61.3 MB in the end (delta: 890.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:12:34,875 INFO L168 Benchmark]: RCFGBuilder took 289.17 ms. Allocated memory is still 86.0 MB. Free memory was 61.1 MB in the beginning and 51.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:12:34,877 INFO L168 Benchmark]: TraceAbstraction took 522.75 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 50.5 MB in the beginning and 74.0 MB in the end (delta: -23.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:12:34,877 INFO L168 Benchmark]: Witness Printer took 5.41 ms. Allocated memory is still 109.1 MB. Free memory was 74.0 MB in the beginning and 73.8 MB in the end (delta: 227.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:12:34,882 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 86.0 MB. Free memory is still 67.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 377.82 ms. Allocated memory is still 86.0 MB. Free memory was 51.1 MB in the beginning and 63.7 MB in the end (delta: -12.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.66 ms. Allocated memory is still 86.0 MB. Free memory was 63.7 MB in the beginning and 62.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.41 ms. Allocated memory is still 86.0 MB. Free memory was 62.2 MB in the beginning and 61.3 MB in the end (delta: 890.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 289.17 ms. Allocated memory is still 86.0 MB. Free memory was 61.1 MB in the beginning and 51.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 522.75 ms. Allocated memory was 86.0 MB in the beginning and 109.1 MB in the end (delta: 23.1 MB). Free memory was 50.5 MB in the beginning and 74.0 MB in the end (delta: -23.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.41 ms. Allocated memory is still 109.1 MB. Free memory was 74.0 MB in the beginning and 73.8 MB in the end (delta: 227.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 28, overapproximation of someBinaryArithmeticFLOAToperation at line 26. Possible FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_2.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, 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=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:12:37,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:12:37,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:12:37,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:12:37,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:12:37,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:12:37,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:12:37,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:12:37,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:12:37,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:12:37,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:12:37,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:12:37,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:12:37,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:12:37,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:12:37,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:12:37,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:12:37,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:12:37,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:12:37,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:12:37,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:12:37,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:12:37,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:12:37,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:12:37,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:12:37,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:12:37,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:12:37,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:12:37,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:12:37,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:12:37,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:12:37,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:12:37,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:12:37,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:12:37,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:12:37,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:12:37,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:12:37,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:12:37,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:12:37,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:12:37,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:12:37,773 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-11-30 01:12:37,824 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:12:37,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:12:37,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:12:37,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:12:37,829 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:12:37,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:12:37,830 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:12:37,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:12:37,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:12:37,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:12:37,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:12:37,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:12:37,833 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 01:12:37,833 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 01:12:37,833 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:12:37,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:12:37,834 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:12:37,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:12:37,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:12:37,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:12:37,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:12:37,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:12:37,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:12:37,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:12:37,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:12:37,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:12:37,836 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-11-30 01:12:37,836 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 01:12:37,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:12:37,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:12:37,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:12:37,837 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-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4a477de7e338b2b004255d636f7482e0c252b22 [2020-11-30 01:12:38,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:12:38,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:12:38,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:12:38,317 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:12:38,318 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:12:38,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/../../sv-benchmarks/c/floats-cdfpl/square_2.i [2020-11-30 01:12:38,415 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/data/555fc920c/970d88e40a2444a28f71166a1ac31084/FLAG4789a51ca [2020-11-30 01:12:39,087 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:12:39,088 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/sv-benchmarks/c/floats-cdfpl/square_2.i [2020-11-30 01:12:39,098 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/data/555fc920c/970d88e40a2444a28f71166a1ac31084/FLAG4789a51ca [2020-11-30 01:12:39,437 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/data/555fc920c/970d88e40a2444a28f71166a1ac31084 [2020-11-30 01:12:39,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:12:39,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:12:39,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:12:39,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:12:39,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:12:39,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:12:39" (1/1) ... [2020-11-30 01:12:39,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a71945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39, skipping insertion in model container [2020-11-30 01:12:39,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:12:39" (1/1) ... [2020-11-30 01:12:39,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:12:39,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:12:39,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:12:39,672 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:12:39,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:12:39,771 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:12:39,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39 WrapperNode [2020-11-30 01:12:39,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:12:39,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:12:39,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:12:39,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:12:39,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39" (1/1) ... [2020-11-30 01:12:39,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39" (1/1) ... [2020-11-30 01:12:39,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:12:39,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:12:39,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:12:39,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:12:39,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39" (1/1) ... [2020-11-30 01:12:39,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39" (1/1) ... [2020-11-30 01:12:39,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39" (1/1) ... [2020-11-30 01:12:39,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39" (1/1) ... [2020-11-30 01:12:39,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39" (1/1) ... [2020-11-30 01:12:39,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39" (1/1) ... [2020-11-30 01:12:39,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39" (1/1) ... [2020-11-30 01:12:39,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:12:39,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:12:39,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:12:39,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:12:39,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/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 [2020-11-30 01:12:39,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 01:12:39,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:12:39,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:12:39,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:12:42,428 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:12:42,428 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-30 01:12:42,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:12:42 BoogieIcfgContainer [2020-11-30 01:12:42,430 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:12:42,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:12:42,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:12:42,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:12:42,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:12:39" (1/3) ... [2020-11-30 01:12:42,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc24258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:12:42, skipping insertion in model container [2020-11-30 01:12:42,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:12:39" (2/3) ... [2020-11-30 01:12:42,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dc24258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:12:42, skipping insertion in model container [2020-11-30 01:12:42,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:12:42" (3/3) ... [2020-11-30 01:12:42,440 INFO L111 eAbstractionObserver]: Analyzing ICFG square_2.i [2020-11-30 01:12:42,452 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:12:42,457 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:12:42,483 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:12:42,509 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:12:42,510 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:12:42,510 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:12:42,510 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:12:42,510 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:12:42,510 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:12:42,511 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:12:42,511 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:12:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-30 01:12:42,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:12:42,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:12:42,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:12:42,532 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:12:42,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:12:42,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1804966438, now seen corresponding path program 1 times [2020-11-30 01:12:42,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-30 01:12:42,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206065791] [2020-11-30 01:12:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/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 [2020-11-30 01:12:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:12:43,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 01:12:43,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:12:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:12:43,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:12:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:12:43,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206065791] [2020-11-30 01:12:43,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:12:43,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 01:12:43,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760547114] [2020-11-30 01:12:43,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:12:43,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-11-30 01:12:43,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:12:43,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:12:43,392 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-11-30 01:12:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:12:43,408 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-11-30 01:12:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:12:43,410 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-11-30 01:12:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:12:43,419 INFO L225 Difference]: With dead ends: 21 [2020-11-30 01:12:43,420 INFO L226 Difference]: Without dead ends: 8 [2020-11-30 01:12:43,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:12:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-30 01:12:43,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-30 01:12:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-30 01:12:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-11-30 01:12:43,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-11-30 01:12:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:12:43,456 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-11-30 01:12:43,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:12:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-11-30 01:12:43,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:12:43,457 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:12:43,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:12:43,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 01:12:43,667 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:12:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:12:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1806813480, now seen corresponding path program 1 times [2020-11-30 01:12:43,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-11-30 01:12:43,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008211219] [2020-11-30 01:12:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/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 [2020-11-30 01:13:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:13:42,635 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:14:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:14:13,807 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:14:13,892 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-11-30 01:14:13,893 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:14:14,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 01:14:14,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:14:14 BoogieIcfgContainer [2020-11-30 01:14:14,114 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:14:14,115 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:14:14,115 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:14:14,115 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:14:14,116 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:12:42" (3/4) ... [2020-11-30 01:14:14,118 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:14:14,170 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9f85a565-dab8-43bb-8da7-fabb84ab24bc/bin/uautomizer/witness.graphml [2020-11-30 01:14:14,171 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:14:14,179 INFO L168 Benchmark]: Toolchain (without parser) took 94717.33 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 36.2 MB in the beginning and 46.7 MB in the end (delta: -10.5 MB). Peak memory consumption was 702.3 kB. Max. memory is 16.1 GB. [2020-11-30 01:14:14,180 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 39.4 MB in the end (delta: 43.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:14:14,182 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.96 ms. Allocated memory is still 56.6 MB. Free memory was 36.1 MB in the beginning and 40.7 MB in the end (delta: -4.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:14:14,184 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.63 ms. Allocated memory is still 56.6 MB. Free memory was 40.6 MB in the beginning and 39.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:14:14,186 INFO L168 Benchmark]: Boogie Preprocessor took 60.55 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 37.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:14:14,190 INFO L168 Benchmark]: RCFGBuilder took 2539.64 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 27.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:14:14,191 INFO L168 Benchmark]: TraceAbstraction took 91681.72 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 26.7 MB in the beginning and 48.3 MB in the end (delta: -21.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:14:14,193 INFO L168 Benchmark]: Witness Printer took 56.07 ms. Allocated memory is still 69.2 MB. Free memory was 48.3 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:14:14,197 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 39.4 MB in the end (delta: 43.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 314.96 ms. Allocated memory is still 56.6 MB. Free memory was 36.1 MB in the beginning and 40.7 MB in the end (delta: -4.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.63 ms. Allocated memory is still 56.6 MB. Free memory was 40.6 MB in the beginning and 39.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.55 ms. Allocated memory is still 56.6 MB. Free memory was 39.2 MB in the beginning and 37.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2539.64 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 27.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 91681.72 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 26.7 MB in the beginning and 48.3 MB in the end (delta: -21.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 56.07 ms. Allocated memory is still 69.2 MB. Free memory was 48.3 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] float IN = __VERIFIER_nondet_float(); [L15] COND FALSE !(!cond) [L23] float x = IN; [L25-L26] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; [L28] COND TRUE !(result >= 0.0f && result < 1.398f) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "square_2.c", 7, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 91.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 59.5s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 72 SizeOfPredicates, 0 NumberOfNonLiveVariables, 27 ConjunctsInSsa, 1 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...