./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.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/loop-floats-scientific-comp/loop2-1.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 02e16371708027ec56fdf0402c3e1a5d4f23a0ff .................................................................................................................................................................................................................................................................................................................................................. 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/loop-floats-scientific-comp/loop2-1.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 02e16371708027ec56fdf0402c3e1a5d4f23a0ff ........................................................................................................................................................................................................................................................................................................................................................................ 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 01:54:38,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 01:54:38,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 01:54:38,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 01:54:38,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 01:54:38,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 01:54:38,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 01:54:38,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 01:54:38,164 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 01:54:38,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 01:54:38,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 01:54:38,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 01:54:38,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 01:54:38,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 01:54:38,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 01:54:38,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 01:54:38,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 01:54:38,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 01:54:38,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 01:54:38,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 01:54:38,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 01:54:38,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 01:54:38,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 01:54:38,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 01:54:38,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 01:54:38,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 01:54:38,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 01:54:38,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 01:54:38,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 01:54:38,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 01:54:38,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 01:54:38,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 01:54:38,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 01:54:38,212 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 01:54:38,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 01:54:38,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 01:54:38,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 01:54:38,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 01:54:38,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 01:54:38,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 01:54:38,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 01:54:38,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 01:54:38,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 01:54:38,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 01:54:38,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 01:54:38,251 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 01:54:38,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 01:54:38,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 01:54:38,253 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 01:54:38,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 01:54:38,254 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 01:54:38,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 01:54:38,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 01:54:38,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 01:54:38,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 01:54:38,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 01:54:38,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 01:54:38,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 01:54:38,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 01:54:38,256 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 01:54:38,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 01:54:38,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 01:54:38,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 01:54:38,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 01:54:38,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 01:54:38,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 01:54:38,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 01:54:38,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 01:54:38,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 01:54:38,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 01:54:38,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 01:54:38,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 01:54:38,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2021-08-26 01:54:38,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 01:54:38,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 01:54:38,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 01:54:38,629 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 01:54:38,629 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 01:54:38,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-08-26 01:54:38,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2959b72f7/df3a1ee1f63a4a21adca428ac77ef5aa/FLAGc792b21ef [2021-08-26 01:54:39,157 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 01:54:39,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-08-26 01:54:39,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2959b72f7/df3a1ee1f63a4a21adca428ac77ef5aa/FLAGc792b21ef [2021-08-26 01:54:39,576 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2959b72f7/df3a1ee1f63a4a21adca428ac77ef5aa [2021-08-26 01:54:39,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 01:54:39,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 01:54:39,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 01:54:39,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 01:54:39,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 01:54:39,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a94807a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39, skipping insertion in model container [2021-08-26 01:54:39,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 01:54:39,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 01:54:39,739 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/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-08-26 01:54:39,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 01:54:39,761 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 01:54:39,793 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/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-08-26 01:54:39,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 01:54:39,835 INFO L208 MainTranslator]: Completed translation [2021-08-26 01:54:39,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39 WrapperNode [2021-08-26 01:54:39,836 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 01:54:39,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 01:54:39,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 01:54:39,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 01:54:39,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,849 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 01:54:39,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 01:54:39,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 01:54:39,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 01:54:39,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 01:54:39,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 01:54:39,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 01:54:39,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 01:54:39,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39" (1/1) ... [2021-08-26 01:54:39,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 01:54:39,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 01:54:39,906 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 01:54:39,929 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 01:54:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 01:54:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 01:54:39,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 01:54:39,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 01:54:40,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 01:54:40,228 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-26 01:54:40,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:40 BoogieIcfgContainer [2021-08-26 01:54:40,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 01:54:40,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 01:54:40,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 01:54:40,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 01:54:40,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:54:39" (1/3) ... [2021-08-26 01:54:40,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303de819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:54:40, skipping insertion in model container [2021-08-26 01:54:40,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:39" (2/3) ... [2021-08-26 01:54:40,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303de819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:54:40, skipping insertion in model container [2021-08-26 01:54:40,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:40" (3/3) ... [2021-08-26 01:54:40,238 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2021-08-26 01:54:40,242 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 01:54:40,242 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 01:54:40,317 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 01:54:40,323 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 01:54:40,323 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 01:54:40,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 01:54:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 01:54:40,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:40,338 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:40,339 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:40,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:40,344 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2021-08-26 01:54:40,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 01:54:40,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649947577] [2021-08-26 01:54:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:40,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 01:54:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:40,496 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 01:54:40,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 01:54:40,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649947577] [2021-08-26 01:54:40,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649947577] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:40,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:40,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 01:54:40,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436628058] [2021-08-26 01:54:40,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 01:54:40,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 01:54:40,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 01:54:40,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 01:54:40,524 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 01:54:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:40,537 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-08-26 01:54:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 01:54:40,538 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-08-26 01:54:40,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:40,544 INFO L225 Difference]: With dead ends: 29 [2021-08-26 01:54:40,545 INFO L226 Difference]: Without dead ends: 12 [2021-08-26 01:54:40,547 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 01:54:40,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-26 01:54:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-26 01:54:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 01:54:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-08-26 01:54:40,571 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-08-26 01:54:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:40,572 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-08-26 01:54:40,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 01:54:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-08-26 01:54:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 01:54:40,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:40,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:40,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 01:54:40,576 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:40,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:40,578 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2021-08-26 01:54:40,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 01:54:40,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9280946] [2021-08-26 01:54:40,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:40,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 01:54:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:40,703 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 01:54:40,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 01:54:40,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9280946] [2021-08-26 01:54:40,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9280946] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:40,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:40,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 01:54:40,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046937539] [2021-08-26 01:54:40,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 01:54:40,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 01:54:40,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 01:54:40,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 01:54:40,707 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 01:54:40,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:40,719 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-08-26 01:54:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 01:54:40,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-08-26 01:54:40,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:40,725 INFO L225 Difference]: With dead ends: 23 [2021-08-26 01:54:40,725 INFO L226 Difference]: Without dead ends: 15 [2021-08-26 01:54:40,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 01:54:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-26 01:54:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-08-26 01:54:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 01:54:40,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-26 01:54:40,731 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-08-26 01:54:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:40,732 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-26 01:54:40,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 01:54:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-26 01:54:40,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 01:54:40,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:40,733 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:40,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 01:54:40,734 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:40,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:40,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2021-08-26 01:54:40,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 01:54:40,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256120875] [2021-08-26 01:54:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:40,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 01:54:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 01:54:40,755 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 01:54:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 01:54:40,783 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 01:54:40,784 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 01:54:40,785 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 01:54:40,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 01:54:40,794 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 01:54:40,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:54:40 BoogieIcfgContainer [2021-08-26 01:54:40,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 01:54:40,813 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 01:54:40,814 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 01:54:40,814 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 01:54:40,814 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:40" (3/4) ... [2021-08-26 01:54:40,817 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 01:54:40,817 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 01:54:40,819 INFO L168 Benchmark]: Toolchain (without parser) took 1233.45 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 45.3 MB in the beginning and 56.9 MB in the end (delta: -11.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:40,819 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 65.0 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:40,820 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.12 ms. Allocated memory is still 65.0 MB. Free memory was 45.2 MB in the beginning and 48.6 MB in the end (delta: -3.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:40,820 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.15 ms. Allocated memory is still 65.0 MB. Free memory was 48.4 MB in the beginning and 47.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:40,821 INFO L168 Benchmark]: Boogie Preprocessor took 18.17 ms. Allocated memory is still 65.0 MB. Free memory was 46.9 MB in the beginning and 45.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:40,821 INFO L168 Benchmark]: RCFGBuilder took 347.48 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 33.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:40,822 INFO L168 Benchmark]: TraceAbstraction took 580.46 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 32.4 MB in the beginning and 56.9 MB in the end (delta: -24.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:40,822 INFO L168 Benchmark]: Witness Printer took 3.91 ms. Allocated memory is still 79.7 MB. Free memory is still 56.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:40,824 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 65.0 MB. Free memory is still 47.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 248.12 ms. Allocated memory is still 65.0 MB. Free memory was 45.2 MB in the beginning and 48.6 MB in the end (delta: -3.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.15 ms. Allocated memory is still 65.0 MB. Free memory was 48.4 MB in the beginning and 47.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.17 ms. Allocated memory is still 65.0 MB. Free memory was 46.9 MB in the beginning and 45.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 347.48 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 33.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 580.46 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 32.4 MB in the beginning and 56.9 MB in the end (delta: -24.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.91 ms. Allocated memory is still 79.7 MB. Free memory is still 56.9 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 - 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 someBinaryFLOATComparisonOperation at line 49, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L14] float pi = 3.14159 ; VAL [pi=314159/100000] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) VAL [pi=314159/100000] [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=314159/100000] [L30] COND TRUE 1 [L32] term = term * (x/count) VAL [pi=314159/100000] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=314159/100000] [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=314159/100000] [L12] COND TRUE !(cond) VAL [pi=314159/100000] [L12] reach_error() VAL [pi=314159/100000] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 482.5ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 7.7ms, AutomataDifference: 59.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 28 SDtfs, 1 SDslu, 8 SDs, 0 SdLazy, 6 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 16.9ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 16.2ms SsaConstructionTime, 70.0ms SatisfiabilityAnalysisTime, 139.9ms InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 21 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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 could not prove your program: unable to determine feasibility of some traces [2021-08-26 01:54:40,857 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 01:54:42,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 01:54:42,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 01:54:42,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 01:54:42,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 01:54:42,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 01:54:42,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 01:54:42,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 01:54:42,737 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 01:54:42,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 01:54:42,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 01:54:42,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 01:54:42,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 01:54:42,750 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 01:54:42,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 01:54:42,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 01:54:42,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 01:54:42,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 01:54:42,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 01:54:42,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 01:54:42,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 01:54:42,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 01:54:42,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 01:54:42,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 01:54:42,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 01:54:42,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 01:54:42,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 01:54:42,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 01:54:42,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 01:54:42,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 01:54:42,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 01:54:42,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 01:54:42,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 01:54:42,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 01:54:42,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 01:54:42,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 01:54:42,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 01:54:42,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 01:54:42,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 01:54:42,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 01:54:42,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 01:54:42,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 01:54:42,827 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 01:54:42,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 01:54:42,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 01:54:42,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 01:54:42,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 01:54:42,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 01:54:42,830 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 01:54:42,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 01:54:42,831 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 01:54:42,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 01:54:42,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 01:54:42,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 01:54:42,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 01:54:42,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 01:54:42,832 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 01:54:42,832 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 01:54:42,833 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 01:54:42,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 01:54:42,833 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 01:54:42,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 01:54:42,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 01:54:42,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 01:54:42,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 01:54:42,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 01:54:42,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 01:54:42,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 01:54:42,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 01:54:42,835 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 01:54:42,835 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 01:54:42,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 01:54:42,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 01:54:42,835 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 01:54:42,836 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02e16371708027ec56fdf0402c3e1a5d4f23a0ff [2021-08-26 01:54:43,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 01:54:43,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 01:54:43,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 01:54:43,241 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 01:54:43,242 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 01:54:43,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-08-26 01:54:43,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f690874/97e328f942334c7b9d927b96c521837f/FLAG06f93557b [2021-08-26 01:54:43,662 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 01:54:43,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-floats-scientific-comp/loop2-1.c [2021-08-26 01:54:43,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f690874/97e328f942334c7b9d927b96c521837f/FLAG06f93557b [2021-08-26 01:54:44,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89f690874/97e328f942334c7b9d927b96c521837f [2021-08-26 01:54:44,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 01:54:44,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 01:54:44,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 01:54:44,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 01:54:44,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 01:54:44,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1109bd40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44, skipping insertion in model container [2021-08-26 01:54:44,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,106 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 01:54:44,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 01:54:44,210 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/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-08-26 01:54:44,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 01:54:44,236 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 01:54:44,246 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/loop-floats-scientific-comp/loop2-1.c[474,487] [2021-08-26 01:54:44,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 01:54:44,297 INFO L208 MainTranslator]: Completed translation [2021-08-26 01:54:44,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44 WrapperNode [2021-08-26 01:54:44,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 01:54:44,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 01:54:44,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 01:54:44,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 01:54:44,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 01:54:44,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 01:54:44,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 01:54:44,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 01:54:44,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 01:54:44,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 01:54:44,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 01:54:44,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 01:54:44,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44" (1/1) ... [2021-08-26 01:54:44,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 01:54:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 01:54:44,382 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 01:54:44,396 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 01:54:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 01:54:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 01:54:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 01:54:44,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 01:54:49,788 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 01:54:49,788 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-26 01:54:49,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:49 BoogieIcfgContainer [2021-08-26 01:54:49,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 01:54:49,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 01:54:49,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 01:54:49,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 01:54:49,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:54:44" (1/3) ... [2021-08-26 01:54:49,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783d67ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:54:49, skipping insertion in model container [2021-08-26 01:54:49,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:54:44" (2/3) ... [2021-08-26 01:54:49,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@783d67ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:54:49, skipping insertion in model container [2021-08-26 01:54:49,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:49" (3/3) ... [2021-08-26 01:54:49,798 INFO L111 eAbstractionObserver]: Analyzing ICFG loop2-1.c [2021-08-26 01:54:49,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 01:54:49,802 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 01:54:49,836 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 01:54:49,842 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 01:54:49,843 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 01:54:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 01:54:49,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 01:54:49,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:49,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:49,860 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:49,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:49,871 INFO L82 PathProgramCache]: Analyzing trace with hash 119997515, now seen corresponding path program 1 times [2021-08-26 01:54:49,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 01:54:49,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421047740] [2021-08-26 01:54:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:49,880 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 01:54:49,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 01:54:49,881 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 01:54:49,884 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 01:54:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:50,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 01:54:50,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 01:54:50,086 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 01:54:50,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 01:54:50,145 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 01:54:50,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 01:54:50,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421047740] [2021-08-26 01:54:50,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421047740] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:50,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:50,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-26 01:54:50,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956135955] [2021-08-26 01:54:50,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 01:54:50,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 01:54:50,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 01:54:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 01:54:50,164 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 01:54:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:50,173 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-08-26 01:54:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 01:54:50,174 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-08-26 01:54:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:50,179 INFO L225 Difference]: With dead ends: 29 [2021-08-26 01:54:50,180 INFO L226 Difference]: Without dead ends: 12 [2021-08-26 01:54:50,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 01:54:50,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-26 01:54:50,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-26 01:54:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 01:54:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-08-26 01:54:50,199 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-08-26 01:54:50,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:50,199 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-08-26 01:54:50,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 01:54:50,199 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-08-26 01:54:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 01:54:50,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:50,200 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:50,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-08-26 01:54:50,413 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 01:54:50,413 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:50,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:50,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2105434535, now seen corresponding path program 1 times [2021-08-26 01:54:50,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 01:54:50,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744120285] [2021-08-26 01:54:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:50,416 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 01:54:50,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 01:54:50,418 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 01:54:50,422 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 01:54:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 01:54:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-26 01:54:51,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 01:54:51,119 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 01:54:51,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 01:54:51,232 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 01:54:51,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 01:54:51,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744120285] [2021-08-26 01:54:51,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744120285] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 01:54:51,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 01:54:51,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-08-26 01:54:51,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773620188] [2021-08-26 01:54:51,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 01:54:51,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 01:54:51,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 01:54:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 01:54:51,235 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 01:54:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 01:54:57,030 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-08-26 01:54:57,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 01:54:57,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 11 [2021-08-26 01:54:57,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 01:54:57,031 INFO L225 Difference]: With dead ends: 24 [2021-08-26 01:54:57,031 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 01:54:57,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 01:54:57,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 01:54:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2021-08-26 01:54:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 01:54:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-26 01:54:57,034 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2021-08-26 01:54:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 01:54:57,034 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-26 01:54:57,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 01:54:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-26 01:54:57,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 01:54:57,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 01:54:57,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 01:54:57,074 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 01:54:57,235 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 01:54:57,236 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 01:54:57,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 01:54:57,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2048176233, now seen corresponding path program 1 times [2021-08-26 01:54:57,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 01:54:57,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126099329] [2021-08-26 01:54:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 01:54:57,237 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 01:54:57,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 01:54:57,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 01:54:57,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-26 01:54:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 01:54:57,923 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 01:54:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 01:54:58,657 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-26 01:54:58,657 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 01:54:58,658 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 01:54:58,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-26 01:54:58,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 01:54:58,864 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 01:54:58,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:54:58 BoogieIcfgContainer [2021-08-26 01:54:58,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 01:54:58,905 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 01:54:58,905 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 01:54:58,905 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 01:54:58,906 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:54:49" (3/4) ... [2021-08-26 01:54:58,908 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 01:54:58,971 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 01:54:58,972 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 01:54:58,973 INFO L168 Benchmark]: Toolchain (without parser) took 14891.38 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 36.0 MB in the beginning and 52.7 MB in the end (delta: -16.7 MB). Peak memory consumption was 24.0 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:58,976 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 56.6 MB. Free memory was 39.0 MB in the beginning and 39.0 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:58,977 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.11 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 40.6 MB in the end (delta: -4.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:58,979 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.87 ms. Allocated memory is still 56.6 MB. Free memory was 40.6 MB in the beginning and 39.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 01:54:58,979 INFO L168 Benchmark]: Boogie Preprocessor took 20.05 ms. Allocated memory is still 56.6 MB. Free memory was 39.0 MB in the beginning and 37.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:58,980 INFO L168 Benchmark]: RCFGBuilder took 5429.99 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 37.5 MB in the beginning and 54.0 MB in the end (delta: -16.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:58,980 INFO L168 Benchmark]: TraceAbstraction took 9100.42 ms. Allocated memory is still 71.3 MB. Free memory was 53.7 MB in the beginning and 29.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:58,981 INFO L168 Benchmark]: Witness Printer took 67.15 ms. Allocated memory is still 71.3 MB. Free memory was 29.6 MB in the beginning and 52.7 MB in the end (delta: -23.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. [2021-08-26 01:54:58,982 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 56.6 MB. Free memory was 39.0 MB in the beginning and 39.0 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 216.11 ms. Allocated memory is still 56.6 MB. Free memory was 35.8 MB in the beginning and 40.6 MB in the end (delta: -4.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.87 ms. Allocated memory is still 56.6 MB. Free memory was 40.6 MB in the beginning and 39.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.05 ms. Allocated memory is still 56.6 MB. Free memory was 39.0 MB in the beginning and 37.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 5429.99 ms. Allocated memory was 56.6 MB in the beginning and 71.3 MB in the end (delta: 14.7 MB). Free memory was 37.5 MB in the beginning and 54.0 MB in the end (delta: -16.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9100.42 ms. Allocated memory is still 71.3 MB. Free memory was 53.7 MB in the beginning and 29.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. * Witness Printer took 67.15 ms. Allocated memory is still 71.3 MB. Free memory was 29.6 MB in the beginning and 52.7 MB in the end (delta: -23.1 MB). Peak memory consumption was 4.1 MB. 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: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] float pi = 3.14159 ; VAL [pi=3.141590118408203] [L20] float x = __VERIFIER_nondet_float() ; [L21] float octant = pi/3 ; [L10] COND FALSE !(!cond) VAL [pi=3.141590118408203] [L23] float oddExp = x ; [L24] float evenExp = 1.0 ; [L25] float term = x ; [L26] unsigned int count = 2 ; [L27] int multFactor = 0 ; [L28] int temp ; VAL [pi=3.141590118408203] [L30] COND TRUE 1 [L32] term = term * (x/count) VAL [pi=3.141590118408203] [L33] EXPR (count>>1 % 2 == 0) ? 1 : -1 VAL [pi=3.141590118408203] [L33] multFactor = (count>>1 % 2 == 0) ? 1 : -1 [L35] evenExp = evenExp + multFactor*term [L37] count++ [L39] term = term * (x/count) [L41] oddExp = oddExp + multFactor*term [L43] count++ [L45] temp = __VERIFIER_nondet_int() [L46] COND TRUE temp == 0 VAL [pi=3.141590118408203] [L12] COND TRUE !(cond) VAL [pi=3.141590118408203] [L12] reach_error() VAL [pi=3.141590118408203] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9028.2ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 9.4ms, AutomataDifference: 5826.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 2 SDslu, 7 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 5605.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 43.0ms SsaConstructionTime, 1232.4ms SatisfiabilityAnalysisTime, 386.8ms InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 1 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 3 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 incorrect! [2021-08-26 01:54:59,079 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...