./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/float_int_inv_square.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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 ../sv-benchmarks/c/float-benchs/float_int_inv_square.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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ................................................................................................................................................................................................................................................................................. 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 ../sv-benchmarks/c/float-benchs/float_int_inv_square.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 8f5b02e58995f52dca6597ad4ab9c04cae63d27d ............................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-20ed64e [2021-08-26 00:26:21,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 00:26:21,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 00:26:21,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 00:26:21,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 00:26:21,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 00:26:21,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 00:26:21,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 00:26:21,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 00:26:21,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 00:26:21,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 00:26:21,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 00:26:21,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 00:26:21,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 00:26:21,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 00:26:21,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 00:26:21,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 00:26:21,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 00:26:21,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 00:26:21,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 00:26:21,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 00:26:21,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 00:26:21,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 00:26:21,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 00:26:21,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 00:26:21,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 00:26:21,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 00:26:21,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 00:26:21,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 00:26:21,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 00:26:21,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 00:26:21,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 00:26:21,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 00:26:21,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 00:26:21,837 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 00:26:21,837 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 00:26:21,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 00:26:21,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 00:26:21,838 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 00:26:21,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 00:26:21,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 00:26:21,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 00:26:21,871 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 00:26:21,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 00:26:21,872 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 00:26:21,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 00:26:21,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 00:26:21,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 00:26:21,874 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 00:26:21,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 00:26:21,875 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 00:26:21,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 00:26:21,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 00:26:21,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 00:26:21,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 00:26:21,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 00:26:21,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 00:26:21,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 00:26:21,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 00:26:21,876 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 00:26:21,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 00:26:21,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 00:26:21,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 00:26:21,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 00:26:21,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:26:21,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 00:26:21,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 00:26:21,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 00:26:21,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 00:26:21,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 00:26:21,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 00:26:21,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 00:26:21,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2021-08-26 00:26:22,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 00:26:22,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 00:26:22,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 00:26:22,144 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 00:26:22,145 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 00:26:22,145 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-08-26 00:26:22,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/000cfc5e8/fd7928b3612046cb8fb2c71b0e105d25/FLAGf8d6af579 [2021-08-26 00:26:22,496 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 00:26:22,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-08-26 00:26:22,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/000cfc5e8/fd7928b3612046cb8fb2c71b0e105d25/FLAGf8d6af579 [2021-08-26 00:26:22,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/000cfc5e8/fd7928b3612046cb8fb2c71b0e105d25 [2021-08-26 00:26:22,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 00:26:22,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 00:26:22,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 00:26:22,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 00:26:22,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 00:26:22,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:26:22" (1/1) ... [2021-08-26 00:26:22,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@557dda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:22, skipping insertion in model container [2021-08-26 00:26:22,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:26:22" (1/1) ... [2021-08-26 00:26:22,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 00:26:22,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 00:26:23,049 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-08-26 00:26:23,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:26:23,060 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 00:26:23,068 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-08-26 00:26:23,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:26:23,078 INFO L208 MainTranslator]: Completed translation [2021-08-26 00:26:23,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23 WrapperNode [2021-08-26 00:26:23,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 00:26:23,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 00:26:23,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 00:26:23,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 00:26:23,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23" (1/1) ... [2021-08-26 00:26:23,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23" (1/1) ... [2021-08-26 00:26:23,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 00:26:23,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 00:26:23,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 00:26:23,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 00:26:23,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23" (1/1) ... [2021-08-26 00:26:23,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23" (1/1) ... [2021-08-26 00:26:23,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23" (1/1) ... [2021-08-26 00:26:23,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23" (1/1) ... [2021-08-26 00:26:23,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23" (1/1) ... [2021-08-26 00:26:23,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23" (1/1) ... [2021-08-26 00:26:23,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23" (1/1) ... [2021-08-26 00:26:23,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 00:26:23,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 00:26:23,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 00:26:23,121 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 00:26:23,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23" (1/1) ... [2021-08-26 00:26:23,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:26:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 00:26:23,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 00:26:23,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 00:26:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 00:26:23,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 00:26:23,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 00:26:23,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 00:26:23,368 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 00:26:23,368 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-26 00:26:23,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:26:23 BoogieIcfgContainer [2021-08-26 00:26:23,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 00:26:23,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 00:26:23,372 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 00:26:23,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 00:26:23,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:26:22" (1/3) ... [2021-08-26 00:26:23,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730a1150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:26:23, skipping insertion in model container [2021-08-26 00:26:23,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:23" (2/3) ... [2021-08-26 00:26:23,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@730a1150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:26:23, skipping insertion in model container [2021-08-26 00:26:23,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:26:23" (3/3) ... [2021-08-26 00:26:23,377 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2021-08-26 00:26:23,381 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 00:26:23,381 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 00:26:23,428 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 00:26:23,435 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 00:26:23,435 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 00:26:23,446 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 00:26:23,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:26:23,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:26:23,450 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:26:23,451 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:26:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:26:23,455 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2021-08-26 00:26:23,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 00:26:23,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358530804] [2021-08-26 00:26:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:26:23,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 00:26:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 00:26:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:26:23,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 00:26:23,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358530804] [2021-08-26 00:26:23,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358530804] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 00:26:23,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 00:26:23,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 00:26:23,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007521147] [2021-08-26 00:26:23,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 00:26:23,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 00:26:23,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 00:26:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:26:23,635 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 00:26:23,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 00:26:23,642 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-08-26 00:26:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 00:26:23,644 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-26 00:26:23,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 00:26:23,648 INFO L225 Difference]: With dead ends: 19 [2021-08-26 00:26:23,655 INFO L226 Difference]: Without dead ends: 7 [2021-08-26 00:26:23,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:26:23,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-08-26 00:26:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-26 00:26:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 00:26:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-08-26 00:26:23,675 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-08-26 00:26:23,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 00:26:23,676 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-08-26 00:26:23,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 00:26:23,676 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-08-26 00:26:23,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:26:23,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:26:23,677 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:26:23,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 00:26:23,677 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:26:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:26:23,678 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2021-08-26 00:26:23,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 00:26:23,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916880883] [2021-08-26 00:26:23,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:26:23,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 00:26:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:26:23,697 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 00:26:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:26:23,727 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 00:26:23,727 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 00:26:23,728 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 00:26:23,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 00:26:23,733 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 00:26:23,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:26:23 BoogieIcfgContainer [2021-08-26 00:26:23,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 00:26:23,744 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 00:26:23,744 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 00:26:23,745 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 00:26:23,745 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:26:23" (3/4) ... [2021-08-26 00:26:23,747 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 00:26:23,747 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 00:26:23,748 INFO L168 Benchmark]: Toolchain (without parser) took 813.48 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.9 MB in the beginning and 47.3 MB in the end (delta: -15.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:26:23,749 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 54.5 MB. Free memory was 36.7 MB in the beginning and 36.7 MB in the end (delta: 36.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:26:23,749 INFO L168 Benchmark]: CACSL2BoogieTranslator took 142.52 ms. Allocated memory is still 54.5 MB. Free memory was 31.7 MB in the beginning and 35.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2021-08-26 00:26:23,750 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.55 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.8 MB in the beginning and 50.7 MB in the end (delta: -14.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 00:26:23,750 INFO L168 Benchmark]: Boogie Preprocessor took 11.72 ms. Allocated memory is still 67.1 MB. Free memory was 50.7 MB in the beginning and 49.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:26:23,751 INFO L168 Benchmark]: RCFGBuilder took 249.80 ms. Allocated memory is still 67.1 MB. Free memory was 49.6 MB in the beginning and 38.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 00:26:23,751 INFO L168 Benchmark]: TraceAbstraction took 371.95 ms. Allocated memory is still 67.1 MB. Free memory was 38.2 MB in the beginning and 47.9 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-08-26 00:26:23,751 INFO L168 Benchmark]: Witness Printer took 2.95 ms. Allocated memory is still 67.1 MB. Free memory was 47.6 MB in the beginning and 47.3 MB in the end (delta: 298.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:26:23,753 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 54.5 MB. Free memory was 36.7 MB in the beginning and 36.7 MB in the end (delta: 36.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 142.52 ms. Allocated memory is still 54.5 MB. Free memory was 31.7 MB in the beginning and 35.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.55 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 35.8 MB in the beginning and 50.7 MB in the end (delta: -14.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 11.72 ms. Allocated memory is still 67.1 MB. Free memory was 50.7 MB in the beginning and 49.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 249.80 ms. Allocated memory is still 67.1 MB. Free memory was 49.6 MB in the beginning and 38.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 371.95 ms. Allocated memory is still 67.1 MB. Free memory was 38.2 MB in the beginning and 47.9 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.95 ms. Allocated memory is still 67.1 MB. Free memory was 47.6 MB in the beginning and 47.3 MB in the end (delta: 298.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 11]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 22, overapproximation of someBinaryArithmeticFLOAToperation at line 21. Possible FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L11] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 305.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.1ms, AutomataDifference: 31.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.7ms SsaConstructionTime, 37.8ms SatisfiabilityAnalysisTime, 72.2ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-26 00:26:23,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 00:26:25,417 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2021-08-26 00:26:25,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 00:26:25,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 00:26:25,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 00:26:25,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 00:26:25,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 00:26:25,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 00:26:25,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 00:26:25,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 00:26:25,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 00:26:25,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 00:26:25,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 00:26:25,497 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 00:26:25,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 00:26:25,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 00:26:25,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 00:26:25,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 00:26:25,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 00:26:25,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 00:26:25,528 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 00:26:25,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 00:26:25,528 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 00:26:25,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 00:26:25,529 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 00:26:25,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 00:26:25,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 00:26:25,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 00:26:25,529 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 00:26:25,529 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 00:26:25,530 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 00:26:25,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 00:26:25,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 00:26:25,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 00:26:25,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 00:26:25,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 00:26:25,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 00:26:25,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:26:25,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 00:26:25,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 00:26:25,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 00:26:25,531 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 00:26:25,531 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 00:26:25,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 00:26:25,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 00:26:25,532 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 00:26:25,532 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f5b02e58995f52dca6597ad4ab9c04cae63d27d [2021-08-26 00:26:25,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 00:26:25,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 00:26:25,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 00:26:25,775 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 00:26:25,776 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 00:26:25,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-08-26 00:26:25,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742cda1b9/a140158496994c30bcde210cf96062d4/FLAG4afe48cec [2021-08-26 00:26:26,203 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 00:26:26,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c [2021-08-26 00:26:26,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742cda1b9/a140158496994c30bcde210cf96062d4/FLAG4afe48cec [2021-08-26 00:26:26,222 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742cda1b9/a140158496994c30bcde210cf96062d4 [2021-08-26 00:26:26,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 00:26:26,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 00:26:26,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 00:26:26,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 00:26:26,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 00:26:26,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@da0a1a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26, skipping insertion in model container [2021-08-26 00:26:26,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 00:26:26,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 00:26:26,379 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-08-26 00:26:26,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:26:26,396 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 00:26:26,406 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/float_int_inv_square.c[488,501] [2021-08-26 00:26:26,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 00:26:26,417 INFO L208 MainTranslator]: Completed translation [2021-08-26 00:26:26,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26 WrapperNode [2021-08-26 00:26:26,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 00:26:26,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 00:26:26,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 00:26:26,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 00:26:26,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,467 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 00:26:26,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 00:26:26,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 00:26:26,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 00:26:26,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,496 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 00:26:26,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 00:26:26,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 00:26:26,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 00:26:26,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26" (1/1) ... [2021-08-26 00:26:26,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 00:26:26,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 00:26:26,531 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 00:26:26,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 00:26:26,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 00:26:26,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 00:26:26,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 00:26:26,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 00:26:27,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 00:26:27,599 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-26 00:26:27,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:26:27 BoogieIcfgContainer [2021-08-26 00:26:27,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 00:26:27,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 00:26:27,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 00:26:27,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 00:26:27,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:26:26" (1/3) ... [2021-08-26 00:26:27,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5811a80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:26:27, skipping insertion in model container [2021-08-26 00:26:27,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:26:26" (2/3) ... [2021-08-26 00:26:27,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5811a80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:26:27, skipping insertion in model container [2021-08-26 00:26:27,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:26:27" (3/3) ... [2021-08-26 00:26:27,605 INFO L111 eAbstractionObserver]: Analyzing ICFG float_int_inv_square.c [2021-08-26 00:26:27,613 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 00:26:27,614 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 00:26:27,642 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 00:26:27,646 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 00:26:27,646 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 00:26:27,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 00:26:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:26:27,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:26:27,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:26:27,658 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:26:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:26:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash 889508713, now seen corresponding path program 1 times [2021-08-26 00:26:27,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 00:26:27,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786509753] [2021-08-26 00:26:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:26:27,669 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 00:26:27,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 00:26:27,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 00:26:27,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 00:26:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 00:26:27,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 00:26:27,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 00:26:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:26:27,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 00:26:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 00:26:27,842 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 00:26:27,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786509753] [2021-08-26 00:26:27,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786509753] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 00:26:27,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 00:26:27,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-26 00:26:27,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712510140] [2021-08-26 00:26:27,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 00:26:27,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 00:26:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 00:26:27,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:26:27,858 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 00:26:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 00:26:27,866 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-08-26 00:26:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 00:26:27,867 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-26 00:26:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 00:26:27,871 INFO L225 Difference]: With dead ends: 19 [2021-08-26 00:26:27,872 INFO L226 Difference]: Without dead ends: 7 [2021-08-26 00:26:27,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 00:26:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-08-26 00:26:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-26 00:26:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 00:26:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-08-26 00:26:27,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 6 [2021-08-26 00:26:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 00:26:27,894 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-08-26 00:26:27,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 00:26:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-08-26 00:26:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 00:26:27,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 00:26:27,894 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 00:26:27,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-26 00:26:28,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 00:26:28,104 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 00:26:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 00:26:28,105 INFO L82 PathProgramCache]: Analyzing trace with hash 889568295, now seen corresponding path program 1 times [2021-08-26 00:26:28,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 00:26:28,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898765173] [2021-08-26 00:26:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 00:26:28,106 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 00:26:28,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 00:26:28,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 00:26:28,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 00:26:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:26:28,194 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 00:26:28,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 00:26:28,273 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-26 00:26:28,273 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 00:26:28,274 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 00:26:28,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-26 00:26:28,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 00:26:28,480 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 00:26:28,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:26:28 BoogieIcfgContainer [2021-08-26 00:26:28,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 00:26:28,495 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 00:26:28,495 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 00:26:28,495 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 00:26:28,495 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:26:27" (3/4) ... [2021-08-26 00:26:28,497 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 00:26:28,535 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 00:26:28,535 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 00:26:28,539 INFO L168 Benchmark]: Toolchain (without parser) took 2310.71 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 24.5 MB in the beginning and 29.6 MB in the end (delta: -5.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2021-08-26 00:26:28,541 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 48.2 MB. Free memory was 30.9 MB in the beginning and 30.9 MB in the end (delta: 21.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:26:28,542 INFO L168 Benchmark]: CACSL2BoogieTranslator took 191.04 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 24.3 MB in the beginning and 38.1 MB in the end (delta: -13.7 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-08-26 00:26:28,542 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.89 ms. Allocated memory is still 60.8 MB. Free memory was 38.1 MB in the beginning and 44.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 00:26:28,543 INFO L168 Benchmark]: Boogie Preprocessor took 29.47 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 43.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:26:28,544 INFO L168 Benchmark]: RCFGBuilder took 1102.59 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 32.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 00:26:28,544 INFO L168 Benchmark]: TraceAbstraction took 892.98 ms. Allocated memory is still 60.8 MB. Free memory was 31.6 MB in the beginning and 31.2 MB in the end (delta: 436.7 kB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. [2021-08-26 00:26:28,544 INFO L168 Benchmark]: Witness Printer took 40.70 ms. Allocated memory is still 60.8 MB. Free memory was 31.2 MB in the beginning and 29.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 00:26:28,549 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 48.2 MB. Free memory was 30.9 MB in the beginning and 30.9 MB in the end (delta: 21.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 191.04 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 24.3 MB in the beginning and 38.1 MB in the end (delta: -13.7 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.89 ms. Allocated memory is still 60.8 MB. Free memory was 38.1 MB in the beginning and 44.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.47 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 43.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1102.59 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 32.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 892.98 ms. Allocated memory is still 60.8 MB. Free memory was 31.6 MB in the beginning and 31.2 MB in the end (delta: 436.7 kB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. * Witness Printer took 40.70 ms. Allocated memory is still 60.8 MB. Free memory was 31.2 MB in the beginning and 29.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int x; [L16] float y, z; [L18] x = __VERIFIER_nondet_int() [L9] COND FALSE !(!cond) [L21] y = x*x - 4.f [L11] COND TRUE !(cond) [L11] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 838.0ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 5.2ms, AutomataDifference: 25.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 13.1ms SsaConstructionTime, 107.4ms SatisfiabilityAnalysisTime, 68.9ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 31 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! [2021-08-26 00:26:28,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...