./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/inv_square-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ee8e70e7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/inv_square-1.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux --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 53d53b1526e829d58326d87a7aff591d9debe20f ........................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-benchs/inv_square-1.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux --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 53d53b1526e829d58326d87a7aff591d9debe20f ................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-ee8e70e [2020-10-24 14:37:22,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:37:22,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:37:22,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:37:22,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:37:22,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:37:22,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:37:22,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:37:22,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:37:22,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:37:22,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:37:22,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:37:22,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:37:22,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:37:22,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:37:22,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:37:22,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:37:22,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:37:22,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:37:22,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:37:22,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:37:22,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:37:22,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:37:22,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:37:22,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:37:22,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:37:22,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:37:22,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:37:22,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:37:22,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:37:22,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:37:22,179 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:37:22,180 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:37:22,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:37:22,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:37:22,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:37:22,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:37:22,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:37:22,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:37:22,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:37:22,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:37:22,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 14:37:22,254 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:37:22,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:37:22,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:37:22,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:37:22,258 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:37:22,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:37:22,259 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:37:22,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 14:37:22,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:37:22,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:37:22,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:37:22,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:37:22,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:37:22,262 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:37:22,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:37:22,262 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:37:22,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:37:22,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:37:22,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:37:22,263 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:37:22,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:37:22,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:37:22,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:37:22,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:37:22,265 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:37:22,265 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 14:37:22,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 14:37:22,266 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:37:22,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:37:22,266 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:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2020-10-24 14:37:22,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:37:22,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:37:22,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:37:22,757 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:37:22,760 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:37:22,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-1.c [2020-10-24 14:37:22,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d52d925e4/0fb32205a6d147049f28ea140d02caab/FLAG223601a46 [2020-10-24 14:37:23,546 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:37:23,547 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-1.c [2020-10-24 14:37:23,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d52d925e4/0fb32205a6d147049f28ea140d02caab/FLAG223601a46 [2020-10-24 14:37:23,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d52d925e4/0fb32205a6d147049f28ea140d02caab [2020-10-24 14:37:23,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:37:23,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:37:23,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:37:23,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:37:23,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:37:23,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:37:23" (1/1) ... [2020-10-24 14:37:23,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ee43e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:23, skipping insertion in model container [2020-10-24 14:37:23,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:37:23" (1/1) ... [2020-10-24 14:37:23,937 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:37:23,958 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:37:24,183 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:37:24,195 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:37:24,213 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:37:24,230 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:37:24,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24 WrapperNode [2020-10-24 14:37:24,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:37:24,232 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:37:24,232 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:37:24,232 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:37:24,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24" (1/1) ... [2020-10-24 14:37:24,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24" (1/1) ... [2020-10-24 14:37:24,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:37:24,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:37:24,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:37:24,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:37:24,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24" (1/1) ... [2020-10-24 14:37:24,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24" (1/1) ... [2020-10-24 14:37:24,285 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24" (1/1) ... [2020-10-24 14:37:24,285 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24" (1/1) ... [2020-10-24 14:37:24,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24" (1/1) ... [2020-10-24 14:37:24,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24" (1/1) ... [2020-10-24 14:37:24,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24" (1/1) ... [2020-10-24 14:37:24,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:37:24,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:37:24,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:37:24,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:37:24,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/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 [2020-10-24 14:37:24,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 14:37:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:37:24,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:37:24,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:37:24,617 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:37:24,618 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-24 14:37:24,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:24 BoogieIcfgContainer [2020-10-24 14:37:24,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:37:24,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:37:24,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:37:24,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:37:24,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:37:23" (1/3) ... [2020-10-24 14:37:24,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f5d682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:37:24, skipping insertion in model container [2020-10-24 14:37:24,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:24" (2/3) ... [2020-10-24 14:37:24,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f5d682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:37:24, skipping insertion in model container [2020-10-24 14:37:24,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:24" (3/3) ... [2020-10-24 14:37:24,630 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2020-10-24 14:37:24,644 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:37:24,649 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:37:24,665 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:37:24,700 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:37:24,700 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:37:24,700 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:37:24,701 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:37:24,701 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:37:24,701 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:37:24,701 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:37:24,701 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:37:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-24 14:37:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:37:24,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:37:24,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:37:24,727 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:37:24,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:37:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash 889510699, now seen corresponding path program 1 times [2020-10-24 14:37:24,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:37:24,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128014090] [2020-10-24 14:37:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:37:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:37:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:37:24,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128014090] [2020-10-24 14:37:24,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:37:24,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 14:37:24,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581710335] [2020-10-24 14:37:24,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:37:24,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 14:37:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:37:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:37:24,955 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-10-24 14:37:24,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:37:24,974 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-10-24 14:37:24,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:37:24,976 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-24 14:37:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:37:24,986 INFO L225 Difference]: With dead ends: 22 [2020-10-24 14:37:24,986 INFO L226 Difference]: Without dead ends: 7 [2020-10-24 14:37:24,990 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 [2020-10-24 14:37:25,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-10-24 14:37:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-24 14:37:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-24 14:37:25,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-10-24 14:37:25,027 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-10-24 14:37:25,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:37:25,028 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-10-24 14:37:25,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:37:25,028 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-10-24 14:37:25,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-24 14:37:25,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:37:25,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-24 14:37:25,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 14:37:25,030 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:37:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:37:25,032 INFO L82 PathProgramCache]: Analyzing trace with hash 889570281, now seen corresponding path program 1 times [2020-10-24 14:37:25,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 14:37:25,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790308964] [2020-10-24 14:37:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 14:37:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:37:25,068 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:37:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:37:25,095 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:37:25,135 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 14:37:25,136 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:37:25,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 14:37:25,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:37:25 BoogieIcfgContainer [2020-10-24 14:37:25,172 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:37:25,173 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:37:25,173 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:37:25,174 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:37:25,175 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:24" (3/4) ... [2020-10-24 14:37:25,179 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 14:37:25,180 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:37:25,186 INFO L168 Benchmark]: Toolchain (without parser) took 1275.90 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 27.9 MB in the beginning and 35.5 MB in the end (delta: -7.5 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:25,189 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 37.7 MB. Free memory was 20.1 MB in the beginning and 20.1 MB in the end (delta: 22.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:37:25,191 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.48 ms. Allocated memory is still 50.3 MB. Free memory was 27.3 MB in the beginning and 31.2 MB in the end (delta: -3.9 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:25,192 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.01 ms. Allocated memory is still 50.3 MB. Free memory was 31.2 MB in the beginning and 29.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:25,193 INFO L168 Benchmark]: Boogie Preprocessor took 23.04 ms. Allocated memory is still 50.3 MB. Free memory was 29.8 MB in the beginning and 28.9 MB in the end (delta: 976.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:37:25,194 INFO L168 Benchmark]: RCFGBuilder took 323.21 ms. Allocated memory is still 50.3 MB. Free memory was 28.7 MB in the beginning and 31.6 MB in the end (delta: -2.9 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:25,196 INFO L168 Benchmark]: TraceAbstraction took 550.74 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 31.3 MB in the beginning and 36.0 MB in the end (delta: -4.6 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:25,197 INFO L168 Benchmark]: Witness Printer took 7.22 ms. Allocated memory is still 60.8 MB. Free memory was 36.0 MB in the beginning and 35.5 MB in the end (delta: 510.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:37:25,210 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 37.7 MB. Free memory was 20.1 MB in the beginning and 20.1 MB in the end (delta: 22.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 317.48 ms. Allocated memory is still 50.3 MB. Free memory was 27.3 MB in the beginning and 31.2 MB in the end (delta: -3.9 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.01 ms. Allocated memory is still 50.3 MB. Free memory was 31.2 MB in the beginning and 29.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.04 ms. Allocated memory is still 50.3 MB. Free memory was 29.8 MB in the beginning and 28.9 MB in the end (delta: 976.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 323.21 ms. Allocated memory is still 50.3 MB. Free memory was 28.7 MB in the beginning and 31.6 MB in the end (delta: -2.9 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 550.74 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 31.3 MB in the beginning and 36.0 MB in the end (delta: -4.6 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. * Witness Printer took 7.22 ms. Allocated memory is still 60.8 MB. Free memory was 36.0 MB in the beginning and 35.5 MB in the end (delta: 510.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryArithmeticFLOAT_SMToperation at line 23, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 22. Possible FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L11] COND FALSE !(!cond) [L22] COND TRUE x != 0.f [L23] y = x * x [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_square-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 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: 12 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=13occurred 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, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 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-ee8e70e [2020-10-24 14:37:27,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 14:37:27,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 14:37:27,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 14:37:27,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 14:37:28,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 14:37:28,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 14:37:28,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 14:37:28,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 14:37:28,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 14:37:28,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 14:37:28,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 14:37:28,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 14:37:28,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 14:37:28,029 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 14:37:28,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 14:37:28,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 14:37:28,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 14:37:28,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 14:37:28,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 14:37:28,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 14:37:28,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 14:37:28,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 14:37:28,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 14:37:28,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 14:37:28,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 14:37:28,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 14:37:28,049 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 14:37:28,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 14:37:28,051 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 14:37:28,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 14:37:28,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 14:37:28,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 14:37:28,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 14:37:28,056 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 14:37:28,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 14:37:28,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 14:37:28,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 14:37:28,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 14:37:28,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 14:37:28,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 14:37:28,071 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 14:37:28,101 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 14:37:28,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 14:37:28,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 14:37:28,104 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 14:37:28,104 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 14:37:28,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 14:37:28,105 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 14:37:28,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 14:37:28,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 14:37:28,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 14:37:28,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 14:37:28,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 14:37:28,106 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 14:37:28,106 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 14:37:28,106 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 14:37:28,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 14:37:28,107 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 14:37:28,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 14:37:28,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 14:37:28,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 14:37:28,108 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 14:37:28,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 14:37:28,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 14:37:28,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 14:37:28,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 14:37:28,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 14:37:28,109 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 14:37:28,110 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 14:37:28,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 14:37:28,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 14:37:28,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 14:37:28,111 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:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 53d53b1526e829d58326d87a7aff591d9debe20f [2020-10-24 14:37:28,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 14:37:28,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 14:37:28,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 14:37:28,646 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 14:37:28,647 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 14:37:28,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/inv_square-1.c [2020-10-24 14:37:28,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24ffb92ed/f94d1e311b6c43a7bfd9ce48fa56d2b1/FLAGe5e46ede0 [2020-10-24 14:37:29,326 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 14:37:29,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/float-benchs/inv_square-1.c [2020-10-24 14:37:29,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24ffb92ed/f94d1e311b6c43a7bfd9ce48fa56d2b1/FLAGe5e46ede0 [2020-10-24 14:37:29,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/24ffb92ed/f94d1e311b6c43a7bfd9ce48fa56d2b1 [2020-10-24 14:37:29,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 14:37:29,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 14:37:29,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 14:37:29,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 14:37:29,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 14:37:29,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:37:29" (1/1) ... [2020-10-24 14:37:29,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d2331eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:29, skipping insertion in model container [2020-10-24 14:37:29,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:37:29" (1/1) ... [2020-10-24 14:37:29,752 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 14:37:29,784 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-10-24 14:37:30,023 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:37:30,054 INFO L212 MainTranslator]: Completed pre-run [2020-10-24 14:37:30,095 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-10-24 14:37:30,130 INFO L217 MainTranslator]: Completed translation [2020-10-24 14:37:30,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30 WrapperNode [2020-10-24 14:37:30,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 14:37:30,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 14:37:30,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 14:37:30,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 14:37:30,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30" (1/1) ... [2020-10-24 14:37:30,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30" (1/1) ... [2020-10-24 14:37:30,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 14:37:30,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 14:37:30,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 14:37:30,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 14:37:30,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30" (1/1) ... [2020-10-24 14:37:30,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30" (1/1) ... [2020-10-24 14:37:30,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30" (1/1) ... [2020-10-24 14:37:30,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30" (1/1) ... [2020-10-24 14:37:30,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30" (1/1) ... [2020-10-24 14:37:30,294 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30" (1/1) ... [2020-10-24 14:37:30,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30" (1/1) ... [2020-10-24 14:37:30,306 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 14:37:30,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 14:37:30,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 14:37:30,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 14:37:30,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/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 [2020-10-24 14:37:30,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 14:37:30,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 14:37:30,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 14:37:30,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 14:37:30,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-10-24 14:37:32,021 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 14:37:32,022 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-24 14:37:32,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:32 BoogieIcfgContainer [2020-10-24 14:37:32,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 14:37:32,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 14:37:32,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 14:37:32,032 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 14:37:32,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:37:29" (1/3) ... [2020-10-24 14:37:32,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@349b4172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:37:32, skipping insertion in model container [2020-10-24 14:37:32,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:37:30" (2/3) ... [2020-10-24 14:37:32,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@349b4172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:37:32, skipping insertion in model container [2020-10-24 14:37:32,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:32" (3/3) ... [2020-10-24 14:37:32,036 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square-1.c [2020-10-24 14:37:32,057 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 14:37:32,062 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 14:37:32,082 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 14:37:32,115 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 14:37:32,116 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 14:37:32,116 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 14:37:32,116 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 14:37:32,116 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 14:37:32,116 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 14:37:32,117 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 14:37:32,117 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 14:37:32,131 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-10-24 14:37:32,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-24 14:37:32,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:37:32,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:37:32,139 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:37:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:37:32,145 INFO L82 PathProgramCache]: Analyzing trace with hash -594068790, now seen corresponding path program 1 times [2020-10-24 14:37:32,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:37:32,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108082303] [2020-10-24 14:37:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/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 [2020-10-24 14:37:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 14:37:32,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 14:37:32,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 14:37:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:37:32,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 14:37:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 14:37:32,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108082303] [2020-10-24 14:37:32,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 14:37:32,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 14:37:32,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372752942] [2020-10-24 14:37:32,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 14:37:32,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 14:37:32,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 14:37:32,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:37:32,374 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-10-24 14:37:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 14:37:32,393 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-10-24 14:37:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 14:37:32,394 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-10-24 14:37:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 14:37:32,410 INFO L225 Difference]: With dead ends: 26 [2020-10-24 14:37:32,410 INFO L226 Difference]: Without dead ends: 10 [2020-10-24 14:37:32,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 14:37:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-10-24 14:37:32,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-10-24 14:37:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-24 14:37:32,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-10-24 14:37:32,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 9 [2020-10-24 14:37:32,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 14:37:32,450 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-10-24 14:37:32,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 14:37:32,450 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-10-24 14:37:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-24 14:37:32,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 14:37:32,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 14:37:32,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 14:37:32,665 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 14:37:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 14:37:32,668 INFO L82 PathProgramCache]: Analyzing trace with hash -592221748, now seen corresponding path program 1 times [2020-10-24 14:37:32,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 14:37:32,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696607257] [2020-10-24 14:37:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/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 [2020-10-24 14:37:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:37:32,835 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:37:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 14:37:32,942 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 14:37:32,990 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-24 14:37:32,991 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 14:37:33,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 14:37:33,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:37:33 BoogieIcfgContainer [2020-10-24 14:37:33,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 14:37:33,224 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 14:37:33,225 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 14:37:33,225 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 14:37:33,225 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:37:32" (3/4) ... [2020-10-24 14:37:33,228 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-24 14:37:33,279 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 14:37:33,279 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 14:37:33,282 INFO L168 Benchmark]: Toolchain (without parser) took 3573.23 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 19.9 MB in the beginning and 33.4 MB in the end (delta: -13.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:33,283 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 41.9 MB. Free memory is still 26.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 14:37:33,284 INFO L168 Benchmark]: CACSL2BoogieTranslator took 418.25 ms. Allocated memory is still 41.9 MB. Free memory was 19.2 MB in the beginning and 18.3 MB in the end (delta: 946.8 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:33,284 INFO L168 Benchmark]: Boogie Procedure Inliner took 89.18 ms. Allocated memory is still 41.9 MB. Free memory was 18.3 MB in the beginning and 16.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:33,286 INFO L168 Benchmark]: Boogie Preprocessor took 84.35 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 16.8 MB in the beginning and 35.5 MB in the end (delta: -18.7 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:33,286 INFO L168 Benchmark]: RCFGBuilder took 1711.84 ms. Allocated memory is still 50.3 MB. Free memory was 35.5 MB in the beginning and 22.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:33,287 INFO L168 Benchmark]: TraceAbstraction took 1197.85 ms. Allocated memory is still 50.3 MB. Free memory was 22.2 MB in the beginning and 20.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:33,288 INFO L168 Benchmark]: Witness Printer took 54.85 ms. Allocated memory is still 50.3 MB. Free memory was 20.9 MB in the beginning and 33.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 14:37:33,293 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 41.9 MB. Free memory is still 26.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 418.25 ms. Allocated memory is still 41.9 MB. Free memory was 19.2 MB in the beginning and 18.3 MB in the end (delta: 946.8 kB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 89.18 ms. Allocated memory is still 41.9 MB. Free memory was 18.3 MB in the beginning and 16.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 84.35 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 16.8 MB in the beginning and 35.5 MB in the end (delta: -18.7 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1711.84 ms. Allocated memory is still 50.3 MB. Free memory was 35.5 MB in the beginning and 22.6 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1197.85 ms. Allocated memory is still 50.3 MB. Free memory was 22.2 MB in the beginning and 20.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. * Witness Printer took 54.85 ms. Allocated memory is still 50.3 MB. Free memory was 20.9 MB in the beginning and 33.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] float x, y, z; [L19] x = __VERIFIER_nondet_float() [L20] EXPR 1.f [L20] EXPR -1.f [L20] x >= -1.f && x <= 1.f [L20] EXPR 1.f [L20] x >= -1.f && x <= 1.f [L11] COND FALSE !(!cond) [L22] EXPR 0.f [L22] COND TRUE x != 0.f [L23] EXPR x * x [L23] y = x * x [L24] 0.f [L13] COND TRUE !(cond) [L3] __assert_fail("0", "inv_square-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 128 SizeOfPredicates, 0 NumberOfNonLiveVariables, 40 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...