./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/bor5.i --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/array-crafted/bor5.i -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 6d7cb37edef68135cf37fb72c0f8e748b042580b ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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/array-crafted/bor5.i -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 6d7cb37edef68135cf37fb72c0f8e748b042580b .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 17:10:03,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 17:10:03,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 17:10:03,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 17:10:03,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 17:10:03,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 17:10:03,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 17:10:03,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 17:10:03,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 17:10:03,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 17:10:03,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 17:10:03,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 17:10:03,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 17:10:03,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 17:10:03,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 17:10:03,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 17:10:03,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 17:10:03,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 17:10:03,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 17:10:03,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 17:10:03,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 17:10:03,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 17:10:03,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 17:10:03,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 17:10:03,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 17:10:03,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 17:10:03,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 17:10:03,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 17:10:03,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 17:10:03,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 17:10:03,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 17:10:03,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 17:10:03,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 17:10:03,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 17:10:03,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 17:10:03,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 17:10:03,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 17:10:03,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 17:10:03,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 17:10:03,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 17:10:03,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 17:10:03,791 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 17:10:03,827 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 17:10:03,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 17:10:03,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 17:10:03,829 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 17:10:03,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 17:10:03,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 17:10:03,831 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 17:10:03,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 17:10:03,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 17:10:03,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 17:10:03,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 17:10:03,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 17:10:03,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 17:10:03,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 17:10:03,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 17:10:03,833 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 17:10:03,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 17:10:03,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 17:10:03,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 17:10:03,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 17:10:03,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 17:10:03,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 17:10:03,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 17:10:03,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 17:10:03,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 17:10:03,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 17:10:03,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 17:10:03,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 17:10:03,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 17:10:03,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 17:10:03,844 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d7cb37edef68135cf37fb72c0f8e748b042580b [2021-08-25 17:10:04,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 17:10:04,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 17:10:04,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 17:10:04,189 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 17:10:04,190 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 17:10:04,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bor5.i [2021-08-25 17:10:04,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af092a2f8/4c8abd406bfc47cc9f54f8d8ce4ecec8/FLAGa855456b5 [2021-08-25 17:10:04,733 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 17:10:04,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor5.i [2021-08-25 17:10:04,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af092a2f8/4c8abd406bfc47cc9f54f8d8ce4ecec8/FLAGa855456b5 [2021-08-25 17:10:05,223 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af092a2f8/4c8abd406bfc47cc9f54f8d8ce4ecec8 [2021-08-25 17:10:05,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 17:10:05,227 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 17:10:05,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 17:10:05,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 17:10:05,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 17:10:05,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e86ba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05, skipping insertion in model container [2021-08-25 17:10:05,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 17:10:05,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 17:10:05,362 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/array-crafted/bor5.i[1364,1377] [2021-08-25 17:10:05,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 17:10:05,373 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 17:10:05,389 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/array-crafted/bor5.i[1364,1377] [2021-08-25 17:10:05,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 17:10:05,416 INFO L208 MainTranslator]: Completed translation [2021-08-25 17:10:05,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05 WrapperNode [2021-08-25 17:10:05,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 17:10:05,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 17:10:05,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 17:10:05,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 17:10:05,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,445 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 17:10:05,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 17:10:05,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 17:10:05,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 17:10:05,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 17:10:05,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 17:10:05,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 17:10:05,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 17:10:05,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05" (1/1) ... [2021-08-25 17:10:05,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 17:10:05,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 17:10:05,502 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) [2021-08-25 17:10:05,504 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 [2021-08-25 17:10:05,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 17:10:05,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 17:10:05,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 17:10:05,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 17:10:05,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 17:10:05,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 17:10:05,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 17:10:05,898 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 17:10:05,912 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-08-25 17:10:05,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 05:10:05 BoogieIcfgContainer [2021-08-25 17:10:05,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 17:10:05,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 17:10:05,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 17:10:05,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 17:10:05,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 05:10:05" (1/3) ... [2021-08-25 17:10:05,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa88973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 05:10:05, skipping insertion in model container [2021-08-25 17:10:05,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:05" (2/3) ... [2021-08-25 17:10:05,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa88973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 05:10:05, skipping insertion in model container [2021-08-25 17:10:05,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 05:10:05" (3/3) ... [2021-08-25 17:10:05,922 INFO L111 eAbstractionObserver]: Analyzing ICFG bor5.i [2021-08-25 17:10:05,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 17:10:05,931 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 17:10:05,981 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 17:10:05,990 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 [2021-08-25 17:10:05,990 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 17:10:06,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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) [2021-08-25 17:10:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 17:10:06,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 17:10:06,012 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 17:10:06,013 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 17:10:06,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 17:10:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1563818866, now seen corresponding path program 1 times [2021-08-25 17:10:06,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 17:10:06,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400970435] [2021-08-25 17:10:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:06,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 17:10:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 17:10:06,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 17:10:06,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400970435] [2021-08-25 17:10:06,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400970435] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 17:10:06,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 17:10:06,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 17:10:06,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22402749] [2021-08-25 17:10:06,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 17:10:06,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 17:10:06,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 17:10:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 17:10:06,229 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-08-25 17:10:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 17:10:06,245 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-08-25 17:10:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 17:10:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2021-08-25 17:10:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 17:10:06,253 INFO L225 Difference]: With dead ends: 53 [2021-08-25 17:10:06,253 INFO L226 Difference]: Without dead ends: 24 [2021-08-25 17:10:06,255 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 [2021-08-25 17:10:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-25 17:10:06,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-25 17:10:06,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-08-25 17:10:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-08-25 17:10:06,283 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2021-08-25 17:10:06,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 17:10:06,284 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-08-25 17:10:06,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-08-25 17:10:06,285 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-08-25 17:10:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 17:10:06,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 17:10:06,286 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 17:10:06,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 17:10:06,287 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 17:10:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 17:10:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2019195128, now seen corresponding path program 1 times [2021-08-25 17:10:06,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 17:10:06,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423196026] [2021-08-25 17:10:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:06,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 17:10:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 17:10:06,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 17:10:06,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423196026] [2021-08-25 17:10:06,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423196026] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 17:10:06,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 17:10:06,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 17:10:06,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591570131] [2021-08-25 17:10:06,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 17:10:06,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 17:10:06,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 17:10:06,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 17:10:06,403 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-08-25 17:10:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 17:10:06,447 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-08-25 17:10:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 17:10:06,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2021-08-25 17:10:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 17:10:06,449 INFO L225 Difference]: With dead ends: 45 [2021-08-25 17:10:06,449 INFO L226 Difference]: Without dead ends: 26 [2021-08-25 17:10:06,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 17:10:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-25 17:10:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-08-25 17:10:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2021-08-25 17:10:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-08-25 17:10:06,460 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-08-25 17:10:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 17:10:06,460 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-08-25 17:10:06,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2021-08-25 17:10:06,461 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-08-25 17:10:06,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 17:10:06,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 17:10:06,462 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 17:10:06,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 17:10:06,463 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 17:10:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 17:10:06,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2143387046, now seen corresponding path program 1 times [2021-08-25 17:10:06,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 17:10:06,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766204726] [2021-08-25 17:10:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:06,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 17:10:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 17:10:06,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 17:10:06,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766204726] [2021-08-25 17:10:06,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766204726] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 17:10:06,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 17:10:06,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 17:10:06,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990090380] [2021-08-25 17:10:06,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 17:10:06,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 17:10:06,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 17:10:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 17:10:06,543 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-08-25 17:10:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 17:10:06,610 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-08-25 17:10:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 17:10:06,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 20 [2021-08-25 17:10:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 17:10:06,613 INFO L225 Difference]: With dead ends: 47 [2021-08-25 17:10:06,613 INFO L226 Difference]: Without dead ends: 31 [2021-08-25 17:10:06,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 17:10:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-25 17:10:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-08-25 17:10:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2021-08-25 17:10:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-08-25 17:10:06,624 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2021-08-25 17:10:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 17:10:06,625 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-08-25 17:10:06,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-08-25 17:10:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-08-25 17:10:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-25 17:10:06,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 17:10:06,626 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 17:10:06,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-25 17:10:06,626 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 17:10:06,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 17:10:06,627 INFO L82 PathProgramCache]: Analyzing trace with hash 46775620, now seen corresponding path program 1 times [2021-08-25 17:10:06,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 17:10:06,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055829109] [2021-08-25 17:10:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:06,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 17:10:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 17:10:06,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 17:10:06,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055829109] [2021-08-25 17:10:06,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055829109] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 17:10:06,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 17:10:06,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 17:10:06,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176815153] [2021-08-25 17:10:06,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 17:10:06,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 17:10:06,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 17:10:06,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 17:10:06,742 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2021-08-25 17:10:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 17:10:06,785 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-08-25 17:10:06,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 17:10:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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 26 [2021-08-25 17:10:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 17:10:06,786 INFO L225 Difference]: With dead ends: 39 [2021-08-25 17:10:06,786 INFO L226 Difference]: Without dead ends: 30 [2021-08-25 17:10:06,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 17:10:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-25 17:10:06,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-08-25 17:10:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 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) [2021-08-25 17:10:06,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-08-25 17:10:06,791 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 26 [2021-08-25 17:10:06,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 17:10:06,791 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-08-25 17:10:06,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2021-08-25 17:10:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-08-25 17:10:06,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 17:10:06,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 17:10:06,792 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 17:10:06,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-25 17:10:06,793 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 17:10:06,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 17:10:06,793 INFO L82 PathProgramCache]: Analyzing trace with hash -548779230, now seen corresponding path program 1 times [2021-08-25 17:10:06,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 17:10:06,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307233220] [2021-08-25 17:10:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:06,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 17:10:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 17:10:06,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 17:10:06,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307233220] [2021-08-25 17:10:06,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307233220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 17:10:06,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795553669] [2021-08-25 17:10:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:06,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 17:10:06,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 17:10:06,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 17:10:06,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 17:10:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:06,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 17:10:06,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 17:10:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 17:10:07,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795553669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 17:10:07,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 17:10:07,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-25 17:10:07,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302691993] [2021-08-25 17:10:07,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 17:10:07,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 17:10:07,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 17:10:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 17:10:07,158 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-08-25 17:10:07,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 17:10:07,205 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-08-25 17:10:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 17:10:07,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 28 [2021-08-25 17:10:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 17:10:07,206 INFO L225 Difference]: With dead ends: 55 [2021-08-25 17:10:07,206 INFO L226 Difference]: Without dead ends: 32 [2021-08-25 17:10:07,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 17:10:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-25 17:10:07,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-08-25 17:10:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 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) [2021-08-25 17:10:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-08-25 17:10:07,217 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2021-08-25 17:10:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 17:10:07,218 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-08-25 17:10:07,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-08-25 17:10:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-08-25 17:10:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 17:10:07,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 17:10:07,219 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 17:10:07,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 17:10:07,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 17:10:07,442 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 17:10:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 17:10:07,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1519457344, now seen corresponding path program 2 times [2021-08-25 17:10:07,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 17:10:07,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202826357] [2021-08-25 17:10:07,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:07,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 17:10:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 17:10:07,510 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 17:10:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 17:10:07,590 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 17:10:07,590 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 17:10:07,591 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 17:10:07,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-25 17:10:07,596 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 17:10:07,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 05:10:07 BoogieIcfgContainer [2021-08-25 17:10:07,627 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 17:10:07,628 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 17:10:07,628 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 17:10:07,628 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 17:10:07,629 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 05:10:05" (3/4) ... [2021-08-25 17:10:07,631 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 17:10:07,631 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 17:10:07,633 INFO L168 Benchmark]: Toolchain (without parser) took 2405.13 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 37.6 MB in the beginning and 30.5 MB in the end (delta: 7.1 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. [2021-08-25 17:10:07,633 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 17:10:07,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.17 ms. Allocated memory is still 58.7 MB. Free memory was 37.4 MB in the beginning and 42.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2021-08-25 17:10:07,634 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.76 ms. Allocated memory is still 58.7 MB. Free memory was 42.5 MB in the beginning and 40.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 17:10:07,635 INFO L168 Benchmark]: Boogie Preprocessor took 20.25 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 39.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 17:10:07,635 INFO L168 Benchmark]: RCFGBuilder took 448.61 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 39.3 MB in the beginning and 51.6 MB in the end (delta: -12.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-08-25 17:10:07,636 INFO L168 Benchmark]: TraceAbstraction took 1710.83 ms. Allocated memory is still 73.4 MB. Free memory was 51.1 MB in the beginning and 30.5 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2021-08-25 17:10:07,636 INFO L168 Benchmark]: Witness Printer took 3.45 ms. Allocated memory is still 73.4 MB. Free memory is still 30.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 17:10:07,639 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 188.17 ms. Allocated memory is still 58.7 MB. Free memory was 37.4 MB in the beginning and 42.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.76 ms. Allocated memory is still 58.7 MB. Free memory was 42.5 MB in the beginning and 40.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.25 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 39.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 448.61 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 39.3 MB in the beginning and 51.6 MB in the end (delta: -12.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1710.83 ms. Allocated memory is still 73.4 MB. Free memory was 51.1 MB in the beginning and 30.5 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. * Witness Printer took 3.45 ms. Allocated memory is still 73.4 MB. Free memory is still 30.5 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: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 25. Possible FailurePath: [L17] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [N=2] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2] [L40] COND FALSE !(i < N) VAL [N=2] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res | x[i] [L24] i++ VAL [N=2] [L24] COND FALSE !(i < N) VAL [N=2] [L27] return res; VAL [N=2] [L45] ret = bor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res | x[i] [L24] i++ VAL [N=2] [L24] COND FALSE !(i < N) VAL [N=2] [L27] return res; VAL [N=2] [L48] ret2 = bor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [N=2] [L50] COND TRUE i 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 -> 6d7cb37edef68135cf37fb72c0f8e748b042580b [2021-08-25 17:10:09,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 17:10:09,898 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 17:10:09,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 17:10:09,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 17:10:09,902 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 17:10:09,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bor5.i [2021-08-25 17:10:09,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d6e0c7da/b237f2b7448f49e889cb4ea91ac0f7b3/FLAGda9794c24 [2021-08-25 17:10:10,412 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 17:10:10,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bor5.i [2021-08-25 17:10:10,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d6e0c7da/b237f2b7448f49e889cb4ea91ac0f7b3/FLAGda9794c24 [2021-08-25 17:10:10,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d6e0c7da/b237f2b7448f49e889cb4ea91ac0f7b3 [2021-08-25 17:10:10,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 17:10:10,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 17:10:10,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 17:10:10,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 17:10:10,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 17:10:10,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac2a36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10, skipping insertion in model container [2021-08-25 17:10:10,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 17:10:10,469 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 17:10:10,592 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/array-crafted/bor5.i[1364,1377] [2021-08-25 17:10:10,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 17:10:10,611 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 17:10:10,653 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/array-crafted/bor5.i[1364,1377] [2021-08-25 17:10:10,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 17:10:10,670 INFO L208 MainTranslator]: Completed translation [2021-08-25 17:10:10,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10 WrapperNode [2021-08-25 17:10:10,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 17:10:10,672 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 17:10:10,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 17:10:10,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 17:10:10,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 17:10:10,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 17:10:10,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 17:10:10,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 17:10:10,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 17:10:10,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 17:10:10,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 17:10:10,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 17:10:10,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10" (1/1) ... [2021-08-25 17:10:10,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 17:10:10,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 17:10:10,762 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) [2021-08-25 17:10:10,788 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 [2021-08-25 17:10:10,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-25 17:10:10,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 17:10:10,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-25 17:10:10,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 17:10:10,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 17:10:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 17:10:10,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-25 17:10:11,155 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 17:10:11,155 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-08-25 17:10:11,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 05:10:11 BoogieIcfgContainer [2021-08-25 17:10:11,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 17:10:11,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 17:10:11,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 17:10:11,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 17:10:11,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 05:10:10" (1/3) ... [2021-08-25 17:10:11,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e73fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 05:10:11, skipping insertion in model container [2021-08-25 17:10:11,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 05:10:10" (2/3) ... [2021-08-25 17:10:11,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e73fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 05:10:11, skipping insertion in model container [2021-08-25 17:10:11,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 05:10:11" (3/3) ... [2021-08-25 17:10:11,163 INFO L111 eAbstractionObserver]: Analyzing ICFG bor5.i [2021-08-25 17:10:11,178 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 17:10:11,184 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 17:10:11,249 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 17:10:11,255 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 [2021-08-25 17:10:11,255 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 17:10:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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) [2021-08-25 17:10:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 17:10:11,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 17:10:11,272 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 17:10:11,273 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 17:10:11,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 17:10:11,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1563818866, now seen corresponding path program 1 times [2021-08-25 17:10:11,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 17:10:11,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326942519] [2021-08-25 17:10:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:11,288 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 17:10:11,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 17:10:11,290 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) [2021-08-25 17:10:11,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-25 17:10:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:11,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-25 17:10:11,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 17:10:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 17:10:11,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 17:10:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 17:10:11,570 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 17:10:11,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326942519] [2021-08-25 17:10:11,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326942519] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 17:10:11,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 17:10:11,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-25 17:10:11,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004499216] [2021-08-25 17:10:11,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 17:10:11,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 17:10:11,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 17:10:11,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 17:10:11,593 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-08-25 17:10:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 17:10:11,610 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-08-25 17:10:11,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 17:10:11,612 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2021-08-25 17:10:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 17:10:11,618 INFO L225 Difference]: With dead ends: 53 [2021-08-25 17:10:11,619 INFO L226 Difference]: Without dead ends: 24 [2021-08-25 17:10:11,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 17:10:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-25 17:10:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-25 17:10:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-08-25 17:10:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-08-25 17:10:11,650 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2021-08-25 17:10:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 17:10:11,650 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-08-25 17:10:11,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-08-25 17:10:11,651 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-08-25 17:10:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 17:10:11,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 17:10:11,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 17:10:11,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-25 17:10:11,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 17:10:11,864 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 17:10:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 17:10:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2019195128, now seen corresponding path program 1 times [2021-08-25 17:10:11,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 17:10:11,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600433412] [2021-08-25 17:10:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:11,867 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 17:10:11,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 17:10:11,868 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) [2021-08-25 17:10:11,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-25 17:10:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 17:10:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 17:10:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 17:10:12,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 17:10:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 17:10:12,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 17:10:12,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600433412] [2021-08-25 17:10:12,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600433412] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-25 17:10:12,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-25 17:10:12,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-08-25 17:10:12,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301771116] [2021-08-25 17:10:12,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 17:10:12,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 17:10:12,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 17:10:12,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 17:10:12,128 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-08-25 17:10:12,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 17:10:12,180 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-08-25 17:10:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 17:10:12,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 18 [2021-08-25 17:10:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 17:10:12,182 INFO L225 Difference]: With dead ends: 46 [2021-08-25 17:10:12,182 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 17:10:12,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 17:10:12,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 17:10:12,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-25 17:10:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2021-08-25 17:10:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-08-25 17:10:12,188 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2021-08-25 17:10:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 17:10:12,189 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-08-25 17:10:12,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2021-08-25 17:10:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-08-25 17:10:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 17:10:12,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 17:10:12,190 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 17:10:12,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-25 17:10:12,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 17:10:12,400 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 17:10:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 17:10:12,401 INFO L82 PathProgramCache]: Analyzing trace with hash -524663612, now seen corresponding path program 1 times [2021-08-25 17:10:12,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 17:10:12,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641840955] [2021-08-25 17:10:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:12,402 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 17:10:12,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 17:10:12,403 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) [2021-08-25 17:10:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-25 17:10:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:12,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 17:10:12,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 17:10:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 17:10:12,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 17:10:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 17:10:12,945 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 17:10:12,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641840955] [2021-08-25 17:10:12,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641840955] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 17:10:12,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 17:10:12,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-25 17:10:12,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749619140] [2021-08-25 17:10:12,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 17:10:12,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 17:10:12,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 17:10:12,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-25 17:10:12,952 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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) [2021-08-25 17:10:13,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 17:10:13,249 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-08-25 17:10:13,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 17:10:13,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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 22 [2021-08-25 17:10:13,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 17:10:13,251 INFO L225 Difference]: With dead ends: 74 [2021-08-25 17:10:13,251 INFO L226 Difference]: Without dead ends: 58 [2021-08-25 17:10:13,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-25 17:10:13,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-25 17:10:13,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 30. [2021-08-25 17:10:13,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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) [2021-08-25 17:10:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-08-25 17:10:13,258 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-08-25 17:10:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 17:10:13,259 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-08-25 17:10:13,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 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) [2021-08-25 17:10:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-08-25 17:10:13,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 17:10:13,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 17:10:13,260 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 17:10:13,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-25 17:10:13,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 17:10:13,470 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 17:10:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 17:10:13,471 INFO L82 PathProgramCache]: Analyzing trace with hash -187943454, now seen corresponding path program 1 times [2021-08-25 17:10:13,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 17:10:13,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744698832] [2021-08-25 17:10:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:13,472 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 17:10:13,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 17:10:13,473 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 17:10:13,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-25 17:10:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:13,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 17:10:13,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 17:10:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-25 17:10:13,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 17:10:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-25 17:10:14,156 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 17:10:14,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744698832] [2021-08-25 17:10:14,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744698832] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-25 17:10:14,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 17:10:14,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-25 17:10:14,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736502359] [2021-08-25 17:10:14,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 17:10:14,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-25 17:10:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 17:10:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-25 17:10:14,159 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2021-08-25 17:10:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 17:10:14,380 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-08-25 17:10:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 17:10:14,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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 28 [2021-08-25 17:10:14,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 17:10:14,381 INFO L225 Difference]: With dead ends: 67 [2021-08-25 17:10:14,382 INFO L226 Difference]: Without dead ends: 58 [2021-08-25 17:10:14,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-08-25 17:10:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-25 17:10:14,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 31. [2021-08-25 17:10:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 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) [2021-08-25 17:10:14,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-08-25 17:10:14,388 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2021-08-25 17:10:14,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 17:10:14,388 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-08-25 17:10:14,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 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) [2021-08-25 17:10:14,388 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-08-25 17:10:14,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 17:10:14,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 17:10:14,389 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 17:10:14,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-25 17:10:14,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-25 17:10:14,597 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 17:10:14,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 17:10:14,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1519457344, now seen corresponding path program 1 times [2021-08-25 17:10:14,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-25 17:10:14,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354705522] [2021-08-25 17:10:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:14,598 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-25 17:10:14,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-25 17:10:14,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-25 17:10:14,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-25 17:10:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:14,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-25 17:10:14,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 17:10:15,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 17:10:15,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-08-25 17:10:15,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 17:10:15,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 17:10:15,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-08-25 17:10:15,876 INFO L354 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2021-08-25 17:10:15,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 45 [2021-08-25 17:10:16,005 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-25 17:10:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-08-25 17:10:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 17:10:16,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 17:10:18,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-08-25 17:10:18,057 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-25 17:10:18,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 156 [2021-08-25 17:10:18,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-08-25 17:10:18,102 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-25 17:10:18,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-08-25 17:10:18,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-25 17:10:18,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354705522] [2021-08-25 17:10:18,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-08-25 17:10:18,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1523214255] [2021-08-25 17:10:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:18,650 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-25 17:10:18,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-25 17:10:18,659 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-25 17:10:18,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-08-25 17:10:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:18,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-25 17:10:18,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 17:10:19,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-25 17:10:19,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 17:10:19,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-08-25 17:10:19,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 17:10:19,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 17:10:19,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-08-25 17:10:19,603 INFO L354 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2021-08-25 17:10:19,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 45 [2021-08-25 17:10:19,657 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-25 17:10:19,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-08-25 17:10:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 17:10:19,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 17:10:24,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2021-08-25 17:10:24,153 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-25 17:10:24,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 714 treesize of output 588 [2021-08-25 17:10:25,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-08-25 17:10:25,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458319872] [2021-08-25 17:10:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 17:10:25,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 17:10:25,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 17:10:25,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 17:10:25,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 17:10:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 17:10:26,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-25 17:10:26,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 17:10:26,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 17:10:26,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-08-25 17:10:27,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-25 17:10:27,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-25 17:10:27,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-08-25 17:10:27,636 INFO L354 Elim1Store]: treesize reduction 56, result has 11.1 percent of original size [2021-08-25 17:10:27,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 45 [2021-08-25 17:10:27,705 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-25 17:10:27,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-08-25 17:10:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 17:10:27,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-25 17:10:29,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-08-25 17:10:29,428 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-25 17:10:29,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 183 [2021-08-25 17:10:29,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-08-25 17:10:29,474 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-25 17:10:29,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-08-25 17:10:29,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-08-25 17:10:29,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-25 17:10:29,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-25 17:10:29,649 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-25 17:10:29,649 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-25 17:10:29,652 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 17:10:29,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-08-25 17:10:29,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-25 17:10:30,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-25 17:10:30,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 17:10:30,260 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 17:10:30,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 05:10:30 BoogieIcfgContainer [2021-08-25 17:10:30,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 17:10:30,276 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 17:10:30,277 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 17:10:30,277 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 17:10:30,277 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 05:10:11" (3/4) ... [2021-08-25 17:10:30,279 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-25 17:10:30,279 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 17:10:30,280 INFO L168 Benchmark]: Toolchain (without parser) took 19838.85 ms. Allocated memory was 56.6 MB in the beginning and 121.6 MB in the end (delta: 65.0 MB). Free memory was 35.3 MB in the beginning and 48.6 MB in the end (delta: -13.4 MB). Peak memory consumption was 50.3 MB. Max. memory is 16.1 GB. [2021-08-25 17:10:30,281 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 56.6 MB. Free memory was 38.7 MB in the beginning and 38.7 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 17:10:30,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.46 ms. Allocated memory is still 56.6 MB. Free memory was 35.1 MB in the beginning and 39.4 MB in the end (delta: -4.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 17:10:30,281 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.74 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 37.6 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 17:10:30,282 INFO L168 Benchmark]: Boogie Preprocessor took 21.52 ms. Allocated memory is still 56.6 MB. Free memory was 37.6 MB in the beginning and 36.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 17:10:30,282 INFO L168 Benchmark]: RCFGBuilder took 415.54 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 36.0 MB in the beginning and 42.7 MB in the end (delta: -6.7 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2021-08-25 17:10:30,282 INFO L168 Benchmark]: TraceAbstraction took 19117.95 ms. Allocated memory was 69.2 MB in the beginning and 121.6 MB in the end (delta: 52.4 MB). Free memory was 42.5 MB in the beginning and 49.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 45.4 MB. Max. memory is 16.1 GB. [2021-08-25 17:10:30,283 INFO L168 Benchmark]: Witness Printer took 3.16 ms. Allocated memory is still 121.6 MB. Free memory was 49.6 MB in the beginning and 48.6 MB in the end (delta: 934.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 17:10:30,284 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 38.7 MB in the beginning and 38.7 MB in the end (delta: 44.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 227.46 ms. Allocated memory is still 56.6 MB. Free memory was 35.1 MB in the beginning and 39.4 MB in the end (delta: -4.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.74 ms. Allocated memory is still 56.6 MB. Free memory was 39.4 MB in the beginning and 37.6 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.52 ms. Allocated memory is still 56.6 MB. Free memory was 37.6 MB in the beginning and 36.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 415.54 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 36.0 MB in the beginning and 42.7 MB in the end (delta: -6.7 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 19117.95 ms. Allocated memory was 69.2 MB in the beginning and 121.6 MB in the end (delta: 52.4 MB). Free memory was 42.5 MB in the beginning and 49.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 45.4 MB. Max. memory is 16.1 GB. * Witness Printer took 3.16 ms. Allocated memory is still 121.6 MB. Free memory was 49.6 MB in the beginning and 48.6 MB in the end (delta: 934.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND FALSE !(i < N) [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res | x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L45] ret = bor(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res | x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L48] ret2 = bor(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; [L50] COND TRUE i