./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/floats-cbmc-regression/float2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54a68f41 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/floats-cbmc-regression/float2.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 069e404bf7b01a351383c4004538ba52022db96a .......................................................................................................................................................................................................................................... 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/floats-cbmc-regression/float2.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 069e404bf7b01a351383c4004538ba52022db96a ....................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-54a68f4 [2020-12-03 17:53:30,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 17:53:30,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 17:53:30,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 17:53:30,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 17:53:30,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 17:53:30,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 17:53:30,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 17:53:30,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 17:53:30,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 17:53:30,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 17:53:30,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 17:53:30,110 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 17:53:30,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 17:53:30,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 17:53:30,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 17:53:30,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 17:53:30,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 17:53:30,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 17:53:30,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 17:53:30,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 17:53:30,124 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 17:53:30,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 17:53:30,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 17:53:30,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 17:53:30,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 17:53:30,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 17:53:30,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 17:53:30,134 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 17:53:30,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 17:53:30,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 17:53:30,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 17:53:30,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 17:53:30,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 17:53:30,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 17:53:30,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 17:53:30,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 17:53:30,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 17:53:30,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 17:53:30,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 17:53:30,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 17:53:30,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-03 17:53:30,182 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 17:53:30,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 17:53:30,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 17:53:30,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 17:53:30,186 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 17:53:30,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 17:53:30,186 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 17:53:30,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 17:53:30,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 17:53:30,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 17:53:30,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 17:53:30,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 17:53:30,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 17:53:30,188 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 17:53:30,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 17:53:30,188 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 17:53:30,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 17:53:30,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 17:53:30,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 17:53:30,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 17:53:30,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 17:53:30,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 17:53:30,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 17:53:30,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 17:53:30,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-03 17:53:30,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 17:53:30,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 17:53:30,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 17:53:30,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 069e404bf7b01a351383c4004538ba52022db96a [2020-12-03 17:53:30,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 17:53:30,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 17:53:30,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 17:53:30,581 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 17:53:30,581 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 17:53:30,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-cbmc-regression/float2.c [2020-12-03 17:53:30,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ef2a16d0/c1b62da86dea44cdbcef4fad5cdb9e68/FLAG7cd35c32f [2020-12-03 17:53:31,314 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 17:53:31,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c [2020-12-03 17:53:31,322 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ef2a16d0/c1b62da86dea44cdbcef4fad5cdb9e68/FLAG7cd35c32f [2020-12-03 17:53:31,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ef2a16d0/c1b62da86dea44cdbcef4fad5cdb9e68 [2020-12-03 17:53:31,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 17:53:31,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 17:53:31,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 17:53:31,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 17:53:31,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 17:53:31,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:53:31" (1/1) ... [2020-12-03 17:53:31,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e285de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31, skipping insertion in model container [2020-12-03 17:53:31,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:53:31" (1/1) ... [2020-12-03 17:53:31,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 17:53:31,774 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 17:53:31,937 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[366,379] [2020-12-03 17:53:31,941 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[420,433] [2020-12-03 17:53:31,943 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[493,506] [2020-12-03 17:53:31,945 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[557,570] [2020-12-03 17:53:31,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 17:53:31,957 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 17:53:31,972 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[366,379] [2020-12-03 17:53:31,973 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[420,433] [2020-12-03 17:53:31,974 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[493,506] [2020-12-03 17:53:31,975 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[557,570] [2020-12-03 17:53:31,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 17:53:31,992 INFO L208 MainTranslator]: Completed translation [2020-12-03 17:53:31,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31 WrapperNode [2020-12-03 17:53:31,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 17:53:31,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 17:53:31,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 17:53:31,995 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 17:53:32,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31" (1/1) ... [2020-12-03 17:53:32,012 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31" (1/1) ... [2020-12-03 17:53:32,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 17:53:32,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 17:53:32,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 17:53:32,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 17:53:32,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31" (1/1) ... [2020-12-03 17:53:32,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31" (1/1) ... [2020-12-03 17:53:32,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31" (1/1) ... [2020-12-03 17:53:32,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31" (1/1) ... [2020-12-03 17:53:32,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31" (1/1) ... [2020-12-03 17:53:32,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31" (1/1) ... [2020-12-03 17:53:32,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31" (1/1) ... [2020-12-03 17:53:32,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 17:53:32,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 17:53:32,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 17:53:32,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 17:53:32,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31" (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 [2020-12-03 17:53:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 17:53:32,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 17:53:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 17:53:32,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 17:53:32,488 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 17:53:32,489 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-03 17:53:32,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:53:32 BoogieIcfgContainer [2020-12-03 17:53:32,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 17:53:32,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 17:53:32,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 17:53:32,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 17:53:32,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 05:53:31" (1/3) ... [2020-12-03 17:53:32,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1670a612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:53:32, skipping insertion in model container [2020-12-03 17:53:32,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:31" (2/3) ... [2020-12-03 17:53:32,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1670a612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:53:32, skipping insertion in model container [2020-12-03 17:53:32,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:53:32" (3/3) ... [2020-12-03 17:53:32,505 INFO L111 eAbstractionObserver]: Analyzing ICFG float2.c [2020-12-03 17:53:32,522 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 17:53:32,526 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-03 17:53:32,543 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-03 17:53:32,576 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 17:53:32,577 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 17:53:32,577 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 17:53:32,578 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 17:53:32,578 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 17:53:32,578 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 17:53:32,578 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 17:53:32,579 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 17:53:32,597 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-03 17:53:32,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 17:53:32,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 17:53:32,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 17:53:32,604 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 17:53:32,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 17:53:32,612 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2020-12-03 17:53:32,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-03 17:53:32,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747658503] [2020-12-03 17:53:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 17:53:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 17:53:32,801 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 17:53:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 17:53:32,844 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 17:53:32,882 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-03 17:53:32,883 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 17:53:32,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 17:53:32,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 05:53:32 BoogieIcfgContainer [2020-12-03 17:53:32,926 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 17:53:32,929 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 17:53:32,929 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 17:53:32,930 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 17:53:32,930 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:53:32" (3/4) ... [2020-12-03 17:53:32,938 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-03 17:53:32,939 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 17:53:32,945 INFO L168 Benchmark]: Toolchain (without parser) took 1247.67 ms. Allocated memory was 44.0 MB in the beginning and 58.7 MB in the end (delta: 14.7 MB). Free memory was 21.5 MB in the beginning and 41.2 MB in the end (delta: -19.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:53:32,947 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 44.0 MB. Free memory was 23.9 MB in the beginning and 23.9 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:53:32,950 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.00 ms. Allocated memory was 44.0 MB in the beginning and 58.7 MB in the end (delta: 14.7 MB). Free memory was 21.3 MB in the beginning and 35.6 MB in the end (delta: -14.3 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-12-03 17:53:32,951 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.54 ms. Allocated memory is still 58.7 MB. Free memory was 35.6 MB in the beginning and 34.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:53:32,953 INFO L168 Benchmark]: Boogie Preprocessor took 21.12 ms. Allocated memory is still 58.7 MB. Free memory was 34.3 MB in the beginning and 33.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 17:53:32,956 INFO L168 Benchmark]: RCFGBuilder took 440.80 ms. Allocated memory is still 58.7 MB. Free memory was 33.3 MB in the beginning and 37.1 MB in the end (delta: -3.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. [2020-12-03 17:53:32,957 INFO L168 Benchmark]: TraceAbstraction took 429.96 ms. Allocated memory is still 58.7 MB. Free memory was 36.7 MB in the beginning and 41.8 MB in the end (delta: -5.1 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. [2020-12-03 17:53:32,959 INFO L168 Benchmark]: Witness Printer took 9.93 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 41.2 MB in the end (delta: 287.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:53:32,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 44.0 MB. Free memory was 23.9 MB in the beginning and 23.9 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 297.00 ms. Allocated memory was 44.0 MB in the beginning and 58.7 MB in the end (delta: 14.7 MB). Free memory was 21.3 MB in the beginning and 35.6 MB in the end (delta: -14.3 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.54 ms. Allocated memory is still 58.7 MB. Free memory was 35.6 MB in the beginning and 34.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.12 ms. Allocated memory is still 58.7 MB. Free memory was 34.3 MB in the beginning and 33.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 440.80 ms. Allocated memory is still 58.7 MB. Free memory was 33.3 MB in the beginning and 37.1 MB in the end (delta: -3.8 MB). Peak memory consumption was 10.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 429.96 ms. Allocated memory is still 58.7 MB. Free memory was 36.7 MB in the beginning and 41.8 MB in the end (delta: -5.1 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. * Witness Printer took 9.93 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 41.2 MB in the end (delta: 287.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 12. Possible FailurePath: [L7] float a; [L8] double b; [L11] a=1.25L [L12] COND TRUE !(a==1.25) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-54a68f4 [2020-12-03 17:53:35,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 17:53:35,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 17:53:35,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 17:53:35,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 17:53:35,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 17:53:35,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 17:53:35,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 17:53:35,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 17:53:35,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 17:53:35,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 17:53:35,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 17:53:35,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 17:53:35,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 17:53:35,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 17:53:35,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 17:53:35,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 17:53:35,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 17:53:35,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 17:53:35,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 17:53:35,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 17:53:35,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 17:53:35,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 17:53:35,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 17:53:35,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 17:53:35,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 17:53:35,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 17:53:35,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 17:53:35,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 17:53:35,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 17:53:35,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 17:53:35,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 17:53:35,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 17:53:35,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 17:53:35,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 17:53:35,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 17:53:35,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 17:53:35,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 17:53:35,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 17:53:35,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 17:53:35,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 17:53:35,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-12-03 17:53:35,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 17:53:35,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 17:53:35,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-03 17:53:35,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-03 17:53:35,527 INFO L138 SettingsManager]: * Use SBE=true [2020-12-03 17:53:35,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 17:53:35,527 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 17:53:35,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 17:53:35,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 17:53:35,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 17:53:35,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 17:53:35,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 17:53:35,530 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-03 17:53:35,530 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-03 17:53:35,530 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 17:53:35,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 17:53:35,531 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 17:53:35,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 17:53:35,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 17:53:35,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-03 17:53:35,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 17:53:35,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 17:53:35,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 17:53:35,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 17:53:35,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 17:53:35,533 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-12-03 17:53:35,533 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-03 17:53:35,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 17:53:35,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 17:53:35,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 17:53:35,534 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 069e404bf7b01a351383c4004538ba52022db96a [2020-12-03 17:53:35,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 17:53:35,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 17:53:35,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 17:53:35,971 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 17:53:35,974 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 17:53:35,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-cbmc-regression/float2.c [2020-12-03 17:53:36,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a85d7174/3b920987055f421e9e971abd6fd87e24/FLAGf89339796 [2020-12-03 17:53:36,741 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 17:53:36,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c [2020-12-03 17:53:36,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a85d7174/3b920987055f421e9e971abd6fd87e24/FLAGf89339796 [2020-12-03 17:53:37,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a85d7174/3b920987055f421e9e971abd6fd87e24 [2020-12-03 17:53:37,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 17:53:37,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 17:53:37,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 17:53:37,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 17:53:37,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 17:53:37,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:53:37" (1/1) ... [2020-12-03 17:53:37,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d1f73a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37, skipping insertion in model container [2020-12-03 17:53:37,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 05:53:37" (1/1) ... [2020-12-03 17:53:37,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 17:53:37,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 17:53:37,325 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[366,379] [2020-12-03 17:53:37,330 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[420,433] [2020-12-03 17:53:37,331 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[493,506] [2020-12-03 17:53:37,333 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[557,570] [2020-12-03 17:53:37,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 17:53:37,350 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 17:53:37,365 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[366,379] [2020-12-03 17:53:37,367 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[420,433] [2020-12-03 17:53:37,368 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[493,506] [2020-12-03 17:53:37,369 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-cbmc-regression/float2.c[557,570] [2020-12-03 17:53:37,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 17:53:37,386 INFO L208 MainTranslator]: Completed translation [2020-12-03 17:53:37,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37 WrapperNode [2020-12-03 17:53:37,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 17:53:37,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 17:53:37,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 17:53:37,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 17:53:37,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37" (1/1) ... [2020-12-03 17:53:37,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37" (1/1) ... [2020-12-03 17:53:37,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 17:53:37,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 17:53:37,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 17:53:37,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 17:53:37,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37" (1/1) ... [2020-12-03 17:53:37,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37" (1/1) ... [2020-12-03 17:53:37,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37" (1/1) ... [2020-12-03 17:53:37,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37" (1/1) ... [2020-12-03 17:53:37,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37" (1/1) ... [2020-12-03 17:53:37,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37" (1/1) ... [2020-12-03 17:53:37,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37" (1/1) ... [2020-12-03 17:53:37,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 17:53:37,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 17:53:37,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 17:53:37,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 17:53:37,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37" (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 [2020-12-03 17:53:37,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 17:53:37,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 17:53:37,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-03 17:53:37,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 17:53:38,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 17:53:38,046 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-03 17:53:38,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:53:38 BoogieIcfgContainer [2020-12-03 17:53:38,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 17:53:38,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 17:53:38,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 17:53:38,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 17:53:38,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 05:53:37" (1/3) ... [2020-12-03 17:53:38,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79531b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:53:38, skipping insertion in model container [2020-12-03 17:53:38,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 05:53:37" (2/3) ... [2020-12-03 17:53:38,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79531b2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 05:53:38, skipping insertion in model container [2020-12-03 17:53:38,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:53:38" (3/3) ... [2020-12-03 17:53:38,063 INFO L111 eAbstractionObserver]: Analyzing ICFG float2.c [2020-12-03 17:53:38,080 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 17:53:38,084 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-03 17:53:38,102 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-03 17:53:38,156 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 17:53:38,157 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 17:53:38,157 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 17:53:38,157 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 17:53:38,158 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 17:53:38,158 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 17:53:38,158 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 17:53:38,158 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 17:53:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-03 17:53:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 17:53:38,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 17:53:38,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 17:53:38,191 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 17:53:38,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 17:53:38,198 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2020-12-03 17:53:38,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 17:53:38,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467083020] [2020-12-03 17:53:38,217 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 [2020-12-03 17:53:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 17:53:38,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-03 17:53:38,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 17:53:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 17:53:38,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 17:53:38,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467083020] [2020-12-03 17:53:38,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 17:53:38,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 17:53:38,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914575964] [2020-12-03 17:53:38,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 17:53:38,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 17:53:38,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 17:53:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 17:53:38,460 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-12-03 17:53:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 17:53:38,617 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-12-03 17:53:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 17:53:38,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-03 17:53:38,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 17:53:38,629 INFO L225 Difference]: With dead ends: 35 [2020-12-03 17:53:38,629 INFO L226 Difference]: Without dead ends: 15 [2020-12-03 17:53:38,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 17:53:38,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-03 17:53:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-03 17:53:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-03 17:53:38,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2020-12-03 17:53:38,668 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 4 [2020-12-03 17:53:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 17:53:38,668 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2020-12-03 17:53:38,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 17:53:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2020-12-03 17:53:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 17:53:38,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 17:53:38,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 17:53:38,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-03 17:53:38,884 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 17:53:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 17:53:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash 889629862, now seen corresponding path program 1 times [2020-12-03 17:53:38,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 17:53:38,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407134201] [2020-12-03 17:53:38,886 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 [2020-12-03 17:53:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 17:53:38,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-03 17:53:38,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 17:53:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 17:53:38,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 17:53:38,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407134201] [2020-12-03 17:53:38,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 17:53:38,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 17:53:38,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230970655] [2020-12-03 17:53:38,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 17:53:38,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 17:53:38,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 17:53:38,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 17:53:38,954 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 3 states. [2020-12-03 17:53:39,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 17:53:39,057 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2020-12-03 17:53:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 17:53:39,058 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-03 17:53:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 17:53:39,058 INFO L225 Difference]: With dead ends: 15 [2020-12-03 17:53:39,058 INFO L226 Difference]: Without dead ends: 13 [2020-12-03 17:53:39,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 17:53:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-03 17:53:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-03 17:53:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-03 17:53:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2020-12-03 17:53:39,063 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 6 [2020-12-03 17:53:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 17:53:39,064 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2020-12-03 17:53:39,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 17:53:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2020-12-03 17:53:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 17:53:39,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 17:53:39,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 17:53:39,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-03 17:53:39,268 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 17:53:39,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 17:53:39,269 INFO L82 PathProgramCache]: Analyzing trace with hash 235930184, now seen corresponding path program 1 times [2020-12-03 17:53:39,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 17:53:39,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821524878] [2020-12-03 17:53:39,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-03 17:53:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 17:53:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-03 17:53:39,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 17:53:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 17:53:39,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 17:53:39,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821524878] [2020-12-03 17:53:39,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 17:53:39,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 17:53:39,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952248895] [2020-12-03 17:53:39,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 17:53:39,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 17:53:39,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 17:53:39,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 17:53:39,365 INFO L87 Difference]: Start difference. First operand 13 states and 12 transitions. Second operand 3 states. [2020-12-03 17:53:39,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 17:53:39,458 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2020-12-03 17:53:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 17:53:39,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-03 17:53:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 17:53:39,459 INFO L225 Difference]: With dead ends: 13 [2020-12-03 17:53:39,459 INFO L226 Difference]: Without dead ends: 11 [2020-12-03 17:53:39,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 17:53:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-03 17:53:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-03 17:53:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-03 17:53:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2020-12-03 17:53:39,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 8 [2020-12-03 17:53:39,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 17:53:39,463 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2020-12-03 17:53:39,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 17:53:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2020-12-03 17:53:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 17:53:39,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 17:53:39,464 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 17:53:39,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-03 17:53:39,666 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 17:53:39,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 17:53:39,667 INFO L82 PathProgramCache]: Analyzing trace with hash -904234870, now seen corresponding path program 1 times [2020-12-03 17:53:39,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-12-03 17:53:39,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454600411] [2020-12-03 17:53:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-03 17:53:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 17:53:39,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-03 17:53:39,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 17:53:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 17:53:39,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-03 17:53:39,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454600411] [2020-12-03 17:53:39,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 17:53:39,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 17:53:39,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533500127] [2020-12-03 17:53:39,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 17:53:39,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-12-03 17:53:39,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 17:53:39,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 17:53:39,741 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand 3 states. [2020-12-03 17:53:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 17:53:39,832 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2020-12-03 17:53:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 17:53:39,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-03 17:53:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 17:53:39,833 INFO L225 Difference]: With dead ends: 11 [2020-12-03 17:53:39,833 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 17:53:39,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 17:53:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 17:53:39,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 17:53:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 17:53:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 17:53:39,835 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-12-03 17:53:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 17:53:39,835 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 17:53:39,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 17:53:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 17:53:39,836 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 17:53:40,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-03 17:53:40,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-03 17:53:40,043 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-03 17:53:40,044 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-12-03 17:53:40,044 INFO L262 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-12-03 17:53:40,044 INFO L262 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-12-03 17:53:40,044 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 23) no Hoare annotation was computed. [2020-12-03 17:53:40,044 INFO L262 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-12-03 17:53:40,044 INFO L262 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-12-03 17:53:40,044 INFO L262 CegarLoopResult]: For program point L19-3(line 19) no Hoare annotation was computed. [2020-12-03 17:53:40,044 INFO L262 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-12-03 17:53:40,045 INFO L262 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-12-03 17:53:40,045 INFO L262 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-12-03 17:53:40,045 INFO L262 CegarLoopResult]: For program point L5(lines 5 24) no Hoare annotation was computed. [2020-12-03 17:53:40,045 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-03 17:53:40,045 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-03 17:53:40,045 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-03 17:53:40,045 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-12-03 17:53:40,046 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2020-12-03 17:53:40,046 INFO L262 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-12-03 17:53:40,046 INFO L262 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-12-03 17:53:40,046 INFO L262 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-12-03 17:53:40,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 05:53:40 BoogieIcfgContainer [2020-12-03 17:53:40,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 17:53:40,052 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 17:53:40,052 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 17:53:40,052 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 17:53:40,053 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 05:53:38" (3/4) ... [2020-12-03 17:53:40,056 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 17:53:40,068 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-03 17:53:40,068 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-03 17:53:40,068 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-03 17:53:40,068 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 17:53:40,108 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-12-03 17:53:40,108 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 17:53:40,110 INFO L168 Benchmark]: Toolchain (without parser) took 2978.61 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 27.4 MB in the beginning and 26.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2020-12-03 17:53:40,111 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 41.9 MB. Free memory was 19.8 MB in the beginning and 19.8 MB in the end (delta: 31.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:53:40,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.15 ms. Allocated memory is still 50.3 MB. Free memory was 27.2 MB in the beginning and 28.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-12-03 17:53:40,112 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.00 ms. Allocated memory is still 50.3 MB. Free memory was 28.3 MB in the beginning and 26.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:53:40,113 INFO L168 Benchmark]: Boogie Preprocessor took 26.82 ms. Allocated memory is still 50.3 MB. Free memory was 26.9 MB in the beginning and 25.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 17:53:40,113 INFO L168 Benchmark]: RCFGBuilder took 595.98 ms. Allocated memory is still 50.3 MB. Free memory was 25.7 MB in the beginning and 25.0 MB in the end (delta: 711.8 kB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-12-03 17:53:40,114 INFO L168 Benchmark]: TraceAbstraction took 2000.17 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 24.6 MB in the beginning and 28.5 MB in the end (delta: -3.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-12-03 17:53:40,115 INFO L168 Benchmark]: Witness Printer took 55.84 ms. Allocated memory is still 60.8 MB. Free memory was 28.5 MB in the beginning and 26.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 17:53:40,118 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 41.9 MB. Free memory was 19.8 MB in the beginning and 19.8 MB in the end (delta: 31.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 248.15 ms. Allocated memory is still 50.3 MB. Free memory was 27.2 MB in the beginning and 28.3 MB in the end (delta: -1.1 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.00 ms. Allocated memory is still 50.3 MB. Free memory was 28.3 MB in the beginning and 26.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.82 ms. Allocated memory is still 50.3 MB. Free memory was 26.9 MB in the beginning and 25.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 595.98 ms. Allocated memory is still 50.3 MB. Free memory was 25.7 MB in the beginning and 25.0 MB in the end (delta: 711.8 kB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2000.17 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 24.6 MB in the beginning and 28.5 MB in the end (delta: -3.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Witness Printer took 55.84 ms. Allocated memory is still 60.8 MB. Free memory was 28.5 MB in the beginning and 26.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 23]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: 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 4 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 14 SDslu, 5 SDs, 0 SdLazy, 37 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 0 LocationsWithAnnotation, 0 PreInvPairs, 0 NumberOfFragments, 0 HoareAnnotationTreeSize, 0 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 0 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 298 SizeOfPredicates, 8 NumberOfNonLiveVariables, 112 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...