./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/float-benchs/inv_square_int.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2880296f Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-benchs/inv_square_int.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 ba8acdf434ba605da81b4b94488025a77c80baa5 ............................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/float-benchs/inv_square_int.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 ba8acdf434ba605da81b4b94488025a77c80baa5 ..................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-2880296 [2020-12-02 14:37:33,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 14:37:33,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 14:37:33,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 14:37:33,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 14:37:33,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 14:37:33,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 14:37:33,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 14:37:33,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 14:37:33,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 14:37:33,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 14:37:33,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 14:37:33,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 14:37:33,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 14:37:33,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 14:37:33,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 14:37:33,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 14:37:33,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 14:37:33,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 14:37:33,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 14:37:33,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 14:37:33,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 14:37:33,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 14:37:33,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 14:37:33,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 14:37:33,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 14:37:33,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 14:37:33,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 14:37:33,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 14:37:33,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 14:37:33,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 14:37:33,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 14:37:33,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 14:37:33,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 14:37:33,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 14:37:33,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 14:37:33,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 14:37:33,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 14:37:33,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 14:37:33,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 14:37:33,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 14:37:33,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-02 14:37:33,500 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 14:37:33,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 14:37:33,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 14:37:33,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 14:37:33,507 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 14:37:33,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 14:37:33,508 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 14:37:33,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-02 14:37:33,509 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 14:37:33,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 14:37:33,510 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 14:37:33,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 14:37:33,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 14:37:33,511 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 14:37:33,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 14:37:33,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 14:37:33,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 14:37:33,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 14:37:33,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 14:37:33,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 14:37:33,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 14:37:33,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 14:37:33,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 14:37:33,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 14:37:33,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 14:37:33,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-02 14:37:33,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-02 14:37:33,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 14:37:33,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 14:37:33,516 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2020-12-02 14:37:34,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 14:37:34,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 14:37:34,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 14:37:34,063 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 14:37:34,064 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 14:37:34,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_square_int.c [2020-12-02 14:37:34,164 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7708e222/9af630306e0345b099822707343d3ad3/FLAGf2642fd24 [2020-12-02 14:37:34,741 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 14:37:34,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square_int.c [2020-12-02 14:37:34,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7708e222/9af630306e0345b099822707343d3ad3/FLAGf2642fd24 [2020-12-02 14:37:35,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7708e222/9af630306e0345b099822707343d3ad3 [2020-12-02 14:37:35,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 14:37:35,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 14:37:35,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 14:37:35,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 14:37:35,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 14:37:35,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:37:35" (1/1) ... [2020-12-02 14:37:35,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d05b6b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35, skipping insertion in model container [2020-12-02 14:37:35,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:37:35" (1/1) ... [2020-12-02 14:37:35,161 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 14:37:35,177 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 14:37:35,332 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square_int.c[482,495] [2020-12-02 14:37:35,345 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:37:35,356 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 14:37:35,371 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square_int.c[482,495] [2020-12-02 14:37:35,375 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:37:35,391 INFO L217 MainTranslator]: Completed translation [2020-12-02 14:37:35,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35 WrapperNode [2020-12-02 14:37:35,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 14:37:35,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 14:37:35,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 14:37:35,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 14:37:35,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35" (1/1) ... [2020-12-02 14:37:35,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35" (1/1) ... [2020-12-02 14:37:35,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 14:37:35,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 14:37:35,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 14:37:35,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 14:37:35,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35" (1/1) ... [2020-12-02 14:37:35,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35" (1/1) ... [2020-12-02 14:37:35,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35" (1/1) ... [2020-12-02 14:37:35,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35" (1/1) ... [2020-12-02 14:37:35,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35" (1/1) ... [2020-12-02 14:37:35,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35" (1/1) ... [2020-12-02 14:37:35,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35" (1/1) ... [2020-12-02 14:37:35,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 14:37:35,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 14:37:35,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 14:37:35,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 14:37:35,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 14:37:35,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-02 14:37:35,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 14:37:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 14:37:35,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 14:37:35,825 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 14:37:35,825 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-02 14:37:35,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:35 BoogieIcfgContainer [2020-12-02 14:37:35,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 14:37:35,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 14:37:35,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 14:37:35,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 14:37:35,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:37:35" (1/3) ... [2020-12-02 14:37:35,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2d9dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:37:35, skipping insertion in model container [2020-12-02 14:37:35,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:35" (2/3) ... [2020-12-02 14:37:35,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2d9dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:37:35, skipping insertion in model container [2020-12-02 14:37:35,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:35" (3/3) ... [2020-12-02 14:37:35,837 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-12-02 14:37:35,855 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 14:37:35,859 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 14:37:35,873 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 14:37:35,902 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 14:37:35,903 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 14:37:35,903 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 14:37:35,903 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 14:37:35,904 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 14:37:35,904 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 14:37:35,904 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 14:37:35,904 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 14:37:35,920 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-02 14:37:35,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 14:37:35,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:37:35,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 14:37:35,928 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:37:35,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:37:35,935 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-12-02 14:37:35,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:37:35,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779458283] [2020-12-02 14:37:35,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:37:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:37:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:37:36,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779458283] [2020-12-02 14:37:36,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-02 14:37:36,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-02 14:37:36,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921016093] [2020-12-02 14:37:36,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 14:37:36,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-02 14:37:36,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 14:37:36,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 14:37:36,141 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-02 14:37:36,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:37:36,159 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-02 14:37:36,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 14:37:36,161 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-02 14:37:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:37:36,170 INFO L225 Difference]: With dead ends: 19 [2020-12-02 14:37:36,171 INFO L226 Difference]: Without dead ends: 7 [2020-12-02 14:37:36,174 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 [2020-12-02 14:37:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-02 14:37:36,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-02 14:37:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-02 14:37:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-12-02 14:37:36,210 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-12-02 14:37:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:37:36,210 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-12-02 14:37:36,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 14:37:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-12-02 14:37:36,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 14:37:36,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:37:36,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 14:37:36,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-02 14:37:36,213 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:37:36,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:37:36,214 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-12-02 14:37:36,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-02 14:37:36,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523879413] [2020-12-02 14:37:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-02 14:37:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:37:36,256 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:37:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-02 14:37:36,278 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-02 14:37:36,301 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-02 14:37:36,302 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-02 14:37:36,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-02 14:37:36,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:37:36 BoogieIcfgContainer [2020-12-02 14:37:36,330 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 14:37:36,331 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 14:37:36,332 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 14:37:36,332 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 14:37:36,333 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:35" (3/4) ... [2020-12-02 14:37:36,336 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-02 14:37:36,337 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 14:37:36,340 INFO L168 Benchmark]: Toolchain (without parser) took 1198.19 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 27.5 MB in the beginning and 43.3 MB in the end (delta: -15.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:37:36,341 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 41.9 MB. Free memory was 21.7 MB in the beginning and 21.6 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:37:36,342 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.86 ms. Allocated memory is still 50.3 MB. Free memory was 27.2 MB in the beginning and 29.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:36,343 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.16 ms. Allocated memory is still 50.3 MB. Free memory was 29.0 MB in the beginning and 27.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:37:36,344 INFO L168 Benchmark]: Boogie Preprocessor took 22.19 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:36,345 INFO L168 Benchmark]: RCFGBuilder took 371.79 ms. Allocated memory is still 50.3 MB. Free memory was 26.6 MB in the beginning and 29.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:36,347 INFO L168 Benchmark]: TraceAbstraction took 501.66 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 28.7 MB in the beginning and 43.6 MB in the end (delta: -14.9 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:36,348 INFO L168 Benchmark]: Witness Printer took 5.57 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 43.3 MB in the end (delta: 288.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:37:36,356 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 41.9 MB. Free memory was 21.7 MB in the beginning and 21.6 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 248.86 ms. Allocated memory is still 50.3 MB. Free memory was 27.2 MB in the beginning and 29.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.16 ms. Allocated memory is still 50.3 MB. Free memory was 29.0 MB in the beginning and 27.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.19 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 371.79 ms. Allocated memory is still 50.3 MB. Free memory was 26.6 MB in the beginning and 29.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 501.66 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 28.7 MB in the beginning and 43.6 MB in the end (delta: -14.9 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. * Witness Printer took 5.57 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 43.3 MB in the end (delta: 288.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryArithmeticFLOAT_SMToperation at line 23, overapproximation of someBinaryFLOAT_SMTComparisonOperation at line 24. Possible FailurePath: [L17] int x; [L18] float y, z; [L20] x = __VERIFIER_nondet_int() [L11] COND FALSE !(!cond) [L23] y = x*x - 2.f [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 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: 10 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=11occurred 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 0.2.0-2880296 [2020-12-02 14:37:38,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-02 14:37:39,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-02 14:37:39,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-02 14:37:39,058 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-02 14:37:39,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-02 14:37:39,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-02 14:37:39,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-02 14:37:39,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-02 14:37:39,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-02 14:37:39,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-02 14:37:39,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-02 14:37:39,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-02 14:37:39,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-02 14:37:39,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-02 14:37:39,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-02 14:37:39,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-02 14:37:39,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-02 14:37:39,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-02 14:37:39,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-02 14:37:39,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-02 14:37:39,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-02 14:37:39,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-02 14:37:39,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-02 14:37:39,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-02 14:37:39,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-02 14:37:39,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-02 14:37:39,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-02 14:37:39,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-02 14:37:39,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-02 14:37:39,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-02 14:37:39,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-02 14:37:39,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-02 14:37:39,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-02 14:37:39,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-02 14:37:39,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-02 14:37:39,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-02 14:37:39,131 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-02 14:37:39,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-02 14:37:39,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-02 14:37:39,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-02 14:37:39,135 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-02 14:37:39,176 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-02 14:37:39,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-02 14:37:39,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-02 14:37:39,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-02 14:37:39,180 INFO L138 SettingsManager]: * Use SBE=true [2020-12-02 14:37:39,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-02 14:37:39,181 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-02 14:37:39,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-02 14:37:39,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-02 14:37:39,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-02 14:37:39,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-02 14:37:39,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-02 14:37:39,183 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-02 14:37:39,184 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-02 14:37:39,184 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-02 14:37:39,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-02 14:37:39,184 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-02 14:37:39,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-02 14:37:39,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-02 14:37:39,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-02 14:37:39,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-02 14:37:39,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-02 14:37:39,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-02 14:37:39,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-02 14:37:39,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-02 14:37:39,187 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-02 14:37:39,187 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-02 14:37:39,187 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-12-02 14:37:39,188 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-02 14:37:39,188 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-02 14:37:39,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-02 14:37:39,188 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba8acdf434ba605da81b4b94488025a77c80baa5 [2020-12-02 14:37:39,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-02 14:37:39,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-02 14:37:39,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-02 14:37:39,660 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-02 14:37:39,661 INFO L275 PluginConnector]: CDTParser initialized [2020-12-02 14:37:39,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/inv_square_int.c [2020-12-02 14:37:39,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ef25b2d3/e379c03590e3459095f6373971e0d7c1/FLAGc9597bcf1 [2020-12-02 14:37:40,341 INFO L306 CDTParser]: Found 1 translation units. [2020-12-02 14:37:40,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square_int.c [2020-12-02 14:37:40,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ef25b2d3/e379c03590e3459095f6373971e0d7c1/FLAGc9597bcf1 [2020-12-02 14:37:40,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ef25b2d3/e379c03590e3459095f6373971e0d7c1 [2020-12-02 14:37:40,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-02 14:37:40,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-02 14:37:40,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-02 14:37:40,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-02 14:37:40,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-02 14:37:40,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:37:40" (1/1) ... [2020-12-02 14:37:40,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66e8ddef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:40, skipping insertion in model container [2020-12-02 14:37:40,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:37:40" (1/1) ... [2020-12-02 14:37:40,695 INFO L146 MainTranslator]: Starting translation in SV-COMP mode [2020-12-02 14:37:40,713 INFO L179 MainTranslator]: Built tables and reachable declarations [2020-12-02 14:37:40,975 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square_int.c[482,495] [2020-12-02 14:37:41,004 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:37:41,031 INFO L212 MainTranslator]: Completed pre-run [2020-12-02 14:37:41,051 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/inv_square_int.c[482,495] [2020-12-02 14:37:41,059 INFO L211 PostProcessor]: Analyzing one entry point: main [2020-12-02 14:37:41,097 INFO L217 MainTranslator]: Completed translation [2020-12-02 14:37:41,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41 WrapperNode [2020-12-02 14:37:41,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-02 14:37:41,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-02 14:37:41,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-02 14:37:41,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-02 14:37:41,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41" (1/1) ... [2020-12-02 14:37:41,141 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41" (1/1) ... [2020-12-02 14:37:41,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-02 14:37:41,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-02 14:37:41,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-02 14:37:41,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-02 14:37:41,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41" (1/1) ... [2020-12-02 14:37:41,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41" (1/1) ... [2020-12-02 14:37:41,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41" (1/1) ... [2020-12-02 14:37:41,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41" (1/1) ... [2020-12-02 14:37:41,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41" (1/1) ... [2020-12-02 14:37:41,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41" (1/1) ... [2020-12-02 14:37:41,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41" (1/1) ... [2020-12-02 14:37:41,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-02 14:37:41,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-02 14:37:41,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-02 14:37:41,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-02 14:37:41,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 14:37:41,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-02 14:37:41,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-02 14:37:41,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-02 14:37:41,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-02 14:37:41,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.float_to_bitvec_FLOAT [2020-12-02 14:37:43,613 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-02 14:37:43,613 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-02 14:37:43,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:43 BoogieIcfgContainer [2020-12-02 14:37:43,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-02 14:37:43,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-02 14:37:43,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-02 14:37:43,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-02 14:37:43,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:37:40" (1/3) ... [2020-12-02 14:37:43,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261f1a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:37:43, skipping insertion in model container [2020-12-02 14:37:43,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:41" (2/3) ... [2020-12-02 14:37:43,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261f1a00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:37:43, skipping insertion in model container [2020-12-02 14:37:43,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:43" (3/3) ... [2020-12-02 14:37:43,624 INFO L111 eAbstractionObserver]: Analyzing ICFG inv_square_int.c [2020-12-02 14:37:43,639 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-02 14:37:43,643 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-02 14:37:43,655 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-02 14:37:43,679 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-02 14:37:43,680 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-02 14:37:43,680 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-02 14:37:43,680 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-02 14:37:43,680 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-02 14:37:43,681 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-02 14:37:43,681 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-02 14:37:43,681 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-02 14:37:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-02 14:37:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 14:37:43,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:37:43,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 14:37:43,701 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:37:43,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:37:43,707 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2020-12-02 14:37:43,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 14:37:43,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728273796] [2020-12-02 14:37:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 14:37:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:37:43,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-02 14:37:43,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:37:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:37:44,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 14:37:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:37:44,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728273796] [2020-12-02 14:37:44,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 14:37:44,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-02 14:37:44,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84081974] [2020-12-02 14:37:44,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-02 14:37:44,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 14:37:44,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-02 14:37:44,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 14:37:44,068 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-12-02 14:37:44,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:37:44,089 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-02 14:37:44,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-02 14:37:44,091 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-02 14:37:44,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:37:44,103 INFO L225 Difference]: With dead ends: 19 [2020-12-02 14:37:44,104 INFO L226 Difference]: Without dead ends: 7 [2020-12-02 14:37:44,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-02 14:37:44,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-02 14:37:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-02 14:37:44,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-02 14:37:44,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2020-12-02 14:37:44,146 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2020-12-02 14:37:44,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:37:44,146 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2020-12-02 14:37:44,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-02 14:37:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2020-12-02 14:37:44,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-02 14:37:44,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-02 14:37:44,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-02 14:37:44,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-02 14:37:44,361 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-02 14:37:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-02 14:37:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2020-12-02 14:37:44,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-02 14:37:44,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450309044] [2020-12-02 14:37:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-12-02 14:37:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-02 14:37:44,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-02 14:37:44,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-02 14:37:44,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 14:37:44,592 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-02 14:37:44,595 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-02 14:37:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:37:48,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-02 14:37:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-02 14:37:50,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450309044] [2020-12-02 14:37:50,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-02 14:37:50,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-02 14:37:50,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349759871] [2020-12-02 14:37:50,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-02 14:37:50,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-02 14:37:50,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-02 14:37:50,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-02 14:37:50,280 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 5 states. [2020-12-02 14:37:51,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-02 14:37:51,209 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2020-12-02 14:37:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-02 14:37:51,209 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-02 14:37:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-02 14:37:51,209 INFO L225 Difference]: With dead ends: 7 [2020-12-02 14:37:51,210 INFO L226 Difference]: Without dead ends: 0 [2020-12-02 14:37:51,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-02 14:37:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-02 14:37:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-02 14:37:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-02 14:37:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-02 14:37:51,211 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2020-12-02 14:37:51,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-02 14:37:51,212 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-02 14:37:51,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-02 14:37:51,212 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-02 14:37:51,212 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-02 14:37:51,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-02 14:37:51,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-02 14:37:51,462 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-02 14:37:51,462 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-02 14:37:51,463 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-02 14:37:51,463 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-02 14:37:51,463 INFO L265 CegarLoopResult]: At program point L26(lines 15 27) the Hoare annotation is: true [2020-12-02 14:37:51,463 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-12-02 14:37:51,463 INFO L262 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-12-02 14:37:51,463 INFO L262 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-12-02 14:37:51,464 INFO L262 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-12-02 14:37:51,464 INFO L262 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-12-02 14:37:51,464 INFO L265 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: true [2020-12-02 14:37:51,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:37:51 BoogieIcfgContainer [2020-12-02 14:37:51,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-02 14:37:51,473 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-02 14:37:51,473 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-02 14:37:51,473 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-02 14:37:51,474 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:43" (3/4) ... [2020-12-02 14:37:51,478 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-02 14:37:51,488 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-02 14:37:51,489 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-02 14:37:51,489 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-02 14:37:51,489 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-02 14:37:51,532 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-02 14:37:51,533 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-02 14:37:51,535 INFO L168 Benchmark]: Toolchain (without parser) took 10859.49 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 25.9 MB in the beginning and 25.0 MB in the end (delta: 924.4 kB). Peak memory consumption was 16.5 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:51,536 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 48.2 MB. Free memory was 31.0 MB in the beginning and 30.9 MB in the end (delta: 34.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:37:51,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 423.11 ms. Allocated memory is still 48.2 MB. Free memory was 25.7 MB in the beginning and 28.6 MB in the end (delta: -2.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:51,537 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.61 ms. Allocated memory is still 48.2 MB. Free memory was 28.6 MB in the beginning and 27.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:51,538 INFO L168 Benchmark]: Boogie Preprocessor took 58.16 ms. Allocated memory is still 48.2 MB. Free memory was 27.1 MB in the beginning and 25.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-02 14:37:51,539 INFO L168 Benchmark]: RCFGBuilder took 2384.28 ms. Allocated memory is still 48.2 MB. Free memory was 25.8 MB in the beginning and 26.8 MB in the end (delta: -961.6 kB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:51,540 INFO L168 Benchmark]: TraceAbstraction took 7855.72 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 26.3 MB in the beginning and 27.4 MB in the end (delta: -1.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:51,541 INFO L168 Benchmark]: Witness Printer took 59.95 ms. Allocated memory is still 58.7 MB. Free memory was 27.4 MB in the beginning and 25.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-02 14:37:51,545 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 48.2 MB. Free memory was 31.0 MB in the beginning and 30.9 MB in the end (delta: 34.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 423.11 ms. Allocated memory is still 48.2 MB. Free memory was 25.7 MB in the beginning and 28.6 MB in the end (delta: -2.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.61 ms. Allocated memory is still 48.2 MB. Free memory was 28.6 MB in the beginning and 27.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.16 ms. Allocated memory is still 48.2 MB. Free memory was 27.1 MB in the beginning and 25.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 2384.28 ms. Allocated memory is still 48.2 MB. Free memory was 25.8 MB in the beginning and 26.8 MB in the end (delta: -961.6 kB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7855.72 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 26.3 MB in the beginning and 27.4 MB in the end (delta: -1.1 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Witness Printer took 59.95 ms. Allocated memory is still 58.7 MB. Free memory was 27.4 MB in the beginning and 25.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 1 SDslu, 3 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 165 SizeOfPredicates, 6 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...