./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/ludcmp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/ludcmp.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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/loops/ludcmp.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:06:37,702 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:06:37,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:06:37,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:06:37,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:06:37,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:06:37,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:06:37,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:06:37,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:06:37,762 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:06:37,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:06:37,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:06:37,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:06:37,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:06:37,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:06:37,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:06:37,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:06:37,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:06:37,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:06:37,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:06:37,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:06:37,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:06:37,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:06:37,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:06:37,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:06:37,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:06:37,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:06:37,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:06:37,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:06:37,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:06:37,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:06:37,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:06:37,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:06:37,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:06:37,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:06:37,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:06:37,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:06:37,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:06:37,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:06:37,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:06:37,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:06:37,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:06:37,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:06:37,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:06:37,838 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:06:37,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:06:37,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:06:37,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:06:37,840 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:06:37,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:06:37,841 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:06:37,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:06:37,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:06:37,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:06:37,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:06:37,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:06:37,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:06:37,842 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:06:37,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:06:37,843 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:06:37,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:06:37,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:06:37,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:06:37,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:06:37,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:06:37,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:06:37,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:06:37,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:06:37,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:06:37,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:06:37,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:06:37,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:06:37,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 [2021-08-26 03:06:38,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:06:38,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:06:38,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:06:38,158 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:06:38,158 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:06:38,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/ludcmp.c [2021-08-26 03:06:38,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5cdd3f09/5793d585a3c643bd82caf495c3b5f767/FLAG6bddc6226 [2021-08-26 03:06:38,602 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:06:38,603 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c [2021-08-26 03:06:38,611 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5cdd3f09/5793d585a3c643bd82caf495c3b5f767/FLAG6bddc6226 [2021-08-26 03:06:39,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5cdd3f09/5793d585a3c643bd82caf495c3b5f767 [2021-08-26 03:06:39,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:06:39,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:06:39,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:06:39,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:06:39,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:06:39,050 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1168036c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39, skipping insertion in model container [2021-08-26 03:06:39,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:06:39,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:06:39,172 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/loops/ludcmp.c[318,331] [2021-08-26 03:06:39,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:06:39,233 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:06:39,277 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/loops/ludcmp.c[318,331] [2021-08-26 03:06:39,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:06:39,333 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:06:39,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39 WrapperNode [2021-08-26 03:06:39,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:06:39,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:06:39,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:06:39,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:06:39,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,358 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:06:39,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:06:39,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:06:39,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:06:39,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:06:39,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:06:39,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:06:39,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:06:39,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39" (1/1) ... [2021-08-26 03:06:39,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:06:39,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:06:39,470 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 03:06:39,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 03:06:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:06:39,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:06:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-08-26 03:06:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-08-26 03:06:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:06:39,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:06:39,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 03:06:40,069 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:06:40,070 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-08-26 03:06:40,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:06:40 BoogieIcfgContainer [2021-08-26 03:06:40,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:06:40,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:06:40,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:06:40,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:06:40,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:06:39" (1/3) ... [2021-08-26 03:06:40,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3e7c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:06:40, skipping insertion in model container [2021-08-26 03:06:40,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:39" (2/3) ... [2021-08-26 03:06:40,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3e7c24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:06:40, skipping insertion in model container [2021-08-26 03:06:40,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:06:40" (3/3) ... [2021-08-26 03:06:40,077 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2021-08-26 03:06:40,081 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:06:40,081 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:06:40,116 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:06:40,124 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 03:06:40,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:06:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:40,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 03:06:40,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:06:40,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:06:40,144 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:06:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:06:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2021-08-26 03:06:40,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:06:40,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177308589] [2021-08-26 03:06:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:06:40,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:06:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:06:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:40,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:06:40,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177308589] [2021-08-26 03:06:40,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177308589] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:06:40,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:06:40,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 03:06:40,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26251496] [2021-08-26 03:06:40,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 03:06:40,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:06:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 03:06:40,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 03:06:40,335 INFO L87 Difference]: Start difference. First operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:40,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:06:40,417 INFO L93 Difference]: Finished difference Result 102 states and 159 transitions. [2021-08-26 03:06:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:06:40,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-08-26 03:06:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:06:40,425 INFO L225 Difference]: With dead ends: 102 [2021-08-26 03:06:40,425 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 03:06:40,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 03:06:40,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 03:06:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2021-08-26 03:06:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-08-26 03:06:40,451 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2021-08-26 03:06:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:06:40,451 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-08-26 03:06:40,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:40,452 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-08-26 03:06:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 03:06:40,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:06:40,468 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:06:40,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:06:40,469 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:06:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:06:40,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1948892579, now seen corresponding path program 1 times [2021-08-26 03:06:40,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:06:40,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448803403] [2021-08-26 03:06:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:06:40,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:06:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:06:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:40,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:06:40,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448803403] [2021-08-26 03:06:40,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448803403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:06:40,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844083428] [2021-08-26 03:06:40,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:06:40,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:06:40,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:06:40,629 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) [2021-08-26 03:06:40,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:06:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:06:40,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 03:06:40,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:06:40,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:40,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844083428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:06:40,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:06:40,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-26 03:06:40,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161434169] [2021-08-26 03:06:40,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 03:06:40,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:06:40,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 03:06:40,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:06:40,992 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:06:41,051 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-08-26 03:06:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:06:41,051 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-26 03:06:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:06:41,052 INFO L225 Difference]: With dead ends: 33 [2021-08-26 03:06:41,052 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 03:06:41,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:06:41,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 03:06:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-08-26 03:06:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-08-26 03:06:41,062 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-08-26 03:06:41,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:06:41,062 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-08-26 03:06:41,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-08-26 03:06:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 03:06:41,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:06:41,064 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:06:41,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 03:06:41,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:06:41,281 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:06:41,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:06:41,282 INFO L82 PathProgramCache]: Analyzing trace with hash 116728450, now seen corresponding path program 2 times [2021-08-26 03:06:41,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:06:41,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831495864] [2021-08-26 03:06:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:06:41,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:06:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:06:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:41,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:06:41,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831495864] [2021-08-26 03:06:41,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831495864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:06:41,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013072338] [2021-08-26 03:06:41,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:06:41,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:06:41,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:06:41,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:06:41,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:06:41,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:06:41,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:06:41,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 03:06:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:06:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:41,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013072338] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:06:41,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 03:06:41,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-08-26 03:06:41,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730095161] [2021-08-26 03:06:41,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:06:41,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:06:41,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:06:41,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:06:41,716 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:06:41,774 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2021-08-26 03:06:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:06:41,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 03:06:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:06:41,775 INFO L225 Difference]: With dead ends: 50 [2021-08-26 03:06:41,775 INFO L226 Difference]: Without dead ends: 34 [2021-08-26 03:06:41,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:06:41,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-26 03:06:41,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-08-26 03:06:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2021-08-26 03:06:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-08-26 03:06:41,780 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2021-08-26 03:06:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:06:41,783 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-08-26 03:06:41,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-08-26 03:06:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 03:06:41,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:06:41,784 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:06:41,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-26 03:06:42,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-26 03:06:42,005 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:06:42,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:06:42,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2021-08-26 03:06:42,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:06:42,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942916937] [2021-08-26 03:06:42,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:06:42,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:06:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:06:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:42,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:06:42,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942916937] [2021-08-26 03:06:42,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942916937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:06:42,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225209905] [2021-08-26 03:06:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:06:42,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:06:42,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:06:42,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:06:42,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 03:06:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:06:42,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 03:06:42,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:06:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:42,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225209905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:06:42,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:06:42,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-26 03:06:42,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644959282] [2021-08-26 03:06:42,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 03:06:42,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:06:42,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 03:06:42,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:06:42,340 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:42,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:06:42,378 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2021-08-26 03:06:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 03:06:42,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 15 [2021-08-26 03:06:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:06:42,380 INFO L225 Difference]: With dead ends: 58 [2021-08-26 03:06:42,380 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 03:06:42,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:06:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 03:06:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-08-26 03:06:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-08-26 03:06:42,391 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 15 [2021-08-26 03:06:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:06:42,392 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-08-26 03:06:42,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-08-26 03:06:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 03:06:42,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:06:42,394 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:06:42,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 03:06:42,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:06:42,607 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:06:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:06:42,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1388100565, now seen corresponding path program 2 times [2021-08-26 03:06:42,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:06:42,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868183100] [2021-08-26 03:06:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:06:42,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:06:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:06:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:42,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:06:42,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868183100] [2021-08-26 03:06:42,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868183100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:06:42,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252783400] [2021-08-26 03:06:42,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:06:42,680 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:06:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:06:42,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:06:42,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 03:06:42,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:06:42,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:06:42,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 03:06:42,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:06:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:42,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252783400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:06:42,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:06:42,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-26 03:06:42,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100231448] [2021-08-26 03:06:42,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 03:06:42,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:06:42,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 03:06:42,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:06:42,955 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-26 03:06:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:06:43,000 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-08-26 03:06:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 03:06:43,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) Word has length 19 [2021-08-26 03:06:43,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:06:43,001 INFO L225 Difference]: With dead ends: 70 [2021-08-26 03:06:43,001 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 03:06:43,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:06:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 03:06:43,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-08-26 03:06:43,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-08-26 03:06:43,006 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 19 [2021-08-26 03:06:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:06:43,006 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-08-26 03:06:43,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-08-26 03:06:43,006 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-08-26 03:06:43,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 03:06:43,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:06:43,007 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:06:43,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 03:06:43,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:06:43,219 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:06:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:06:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash 756876242, now seen corresponding path program 3 times [2021-08-26 03:06:43,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:06:43,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975528276] [2021-08-26 03:06:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:06:43,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:06:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:06:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:43,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:06:43,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975528276] [2021-08-26 03:06:43,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975528276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:06:43,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243635255] [2021-08-26 03:06:43,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:06:43,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:06:43,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:06:43,309 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:06:43,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 03:06:43,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-26 03:06:43,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:06:43,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:06:43,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:06:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:43,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243635255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:06:43,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:06:43,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-26 03:06:43,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034528548] [2021-08-26 03:06:43,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 03:06:43,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:06:43,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 03:06:43,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:06:43,616 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:06:43,676 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-08-26 03:06:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 03:06:43,677 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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 23 [2021-08-26 03:06:43,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:06:43,679 INFO L225 Difference]: With dead ends: 82 [2021-08-26 03:06:43,679 INFO L226 Difference]: Without dead ends: 58 [2021-08-26 03:06:43,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:06:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-26 03:06:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-08-26 03:06:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-08-26 03:06:43,690 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 23 [2021-08-26 03:06:43,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:06:43,690 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-08-26 03:06:43,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-08-26 03:06:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 03:06:43,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:06:43,692 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:06:43,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 03:06:43,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:06:43,905 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:06:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:06:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1523542023, now seen corresponding path program 4 times [2021-08-26 03:06:43,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:06:43,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131067654] [2021-08-26 03:06:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:06:43,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:06:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:06:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:43,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:06:43,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131067654] [2021-08-26 03:06:43,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131067654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:06:43,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547182334] [2021-08-26 03:06:43,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:06:43,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:06:43,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:06:44,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:06:44,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 03:06:44,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:06:44,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:06:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:06:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:06:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:06:44,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547182334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:06:44,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:06:44,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-26 03:06:44,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893063568] [2021-08-26 03:06:44,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 03:06:44,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:06:44,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 03:06:44,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-26 03:06:44,385 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:44,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:06:44,466 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2021-08-26 03:06:44,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 03:06:44,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 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 27 [2021-08-26 03:06:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:06:44,467 INFO L225 Difference]: With dead ends: 94 [2021-08-26 03:06:44,467 INFO L226 Difference]: Without dead ends: 66 [2021-08-26 03:06:44,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-08-26 03:06:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-26 03:06:44,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-08-26 03:06:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 59 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:44,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-08-26 03:06:44,472 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 27 [2021-08-26 03:06:44,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:06:44,472 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-08-26 03:06:44,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:06:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-08-26 03:06:44,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 03:06:44,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:06:44,473 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:06:44,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 03:06:44,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:06:44,689 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:06:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:06:44,689 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 5 times [2021-08-26 03:06:44,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:06:44,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619100642] [2021-08-26 03:06:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:06:44,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:06:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:06:44,704 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 03:06:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:06:44,749 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 03:06:44,750 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 03:06:44,750 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:06:44,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-26 03:06:44,756 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:06:44,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:06:44 BoogieIcfgContainer [2021-08-26 03:06:44,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:06:44,810 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:06:44,810 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:06:44,810 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:06:44,811 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:06:40" (3/4) ... [2021-08-26 03:06:44,814 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 03:06:44,814 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:06:44,815 INFO L168 Benchmark]: Toolchain (without parser) took 5783.09 ms. Allocated memory was 65.0 MB in the beginning and 96.5 MB in the end (delta: 31.5 MB). Free memory was 44.5 MB in the beginning and 48.4 MB in the end (delta: -3.8 MB). Peak memory consumption was 27.0 MB. Max. memory is 16.1 GB. [2021-08-26 03:06:44,816 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 65.0 MB. Free memory was 46.4 MB in the beginning and 46.3 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:06:44,816 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.52 ms. Allocated memory is still 65.0 MB. Free memory was 44.4 MB in the beginning and 46.7 MB in the end (delta: -2.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:06:44,817 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.90 ms. Allocated memory is still 65.0 MB. Free memory was 46.4 MB in the beginning and 44.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:06:44,817 INFO L168 Benchmark]: Boogie Preprocessor took 51.56 ms. Allocated memory is still 65.0 MB. Free memory was 44.2 MB in the beginning and 42.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:06:44,817 INFO L168 Benchmark]: RCFGBuilder took 627.54 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 42.4 MB in the beginning and 50.9 MB in the end (delta: -8.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-08-26 03:06:44,817 INFO L168 Benchmark]: TraceAbstraction took 4737.57 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 50.5 MB in the beginning and 48.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:06:44,818 INFO L168 Benchmark]: Witness Printer took 4.04 ms. Allocated memory is still 96.5 MB. Free memory was 48.5 MB in the beginning and 48.4 MB in the end (delta: 138.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:06:44,823 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 65.0 MB. Free memory was 46.4 MB in the beginning and 46.3 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.52 ms. Allocated memory is still 65.0 MB. Free memory was 44.4 MB in the beginning and 46.7 MB in the end (delta: -2.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.90 ms. Allocated memory is still 65.0 MB. Free memory was 46.4 MB in the beginning and 44.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.56 ms. Allocated memory is still 65.0 MB. Free memory was 44.2 MB in the beginning and 42.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 627.54 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 42.4 MB in the beginning and 50.9 MB in the end (delta: -8.5 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4737.57 ms. Allocated memory was 79.7 MB in the beginning and 96.5 MB in the end (delta: 16.8 MB). Free memory was 50.5 MB in the beginning and 48.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. * Witness Printer took 4.04 ms. Allocated memory is still 96.5 MB. Free memory was 48.5 MB in the beginning and 48.4 MB in the end (delta: 138.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 7]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_real at line 98, overapproximation of someBinaryArithmeticDOUBLEoperation at line 100. Possible FailurePath: [L71] double a[50][50], b[50], x[50]; VAL [a={7:0}, b={5:0}, x={6:0}] [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={7:0}, b={5:0}, x={6:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={5:0}, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={5:0}, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={5:0}, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={5:0}, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={5:0}, x={6:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={5:0}, x={6:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={5:0}, x={6:0}] [L96] COND FALSE !(j <= n) VAL [a={7:0}, b={5:0}, x={6:0}] [L6] COND TRUE !(cond) VAL [a={7:0}, b={5:0}, x={6:0}] [L7] reach_error() VAL [a={7:0}, b={5:0}, x={6:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4640.3ms, OverallIterations: 8, TraceHistogramMax: 6, EmptinessCheckTime: 16.0ms, AutomataDifference: 472.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 109 SDtfs, 293 SDslu, 228 SDs, 0 SdLazy, 240 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 242.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 418.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=7, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 52.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 36 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 101.7ms SsaConstructionTime, 296.1ms SatisfiabilityAnalysisTime, 1709.6ms InterpolantComputationTime, 258 NumberOfCodeBlocks, 258 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 1006 SizeOfPredicates, 12 NumberOfNonLiveVariables, 566 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 10/202 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-26 03:06:44,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:06:46,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:06:46,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:06:46,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:06:46,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:06:46,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:06:46,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:06:46,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:06:46,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:06:46,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:06:46,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:06:46,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:06:46,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:06:46,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:06:46,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:06:46,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:06:46,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:06:46,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:06:46,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:06:46,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:06:46,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:06:46,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:06:46,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:06:46,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:06:46,661 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:06:46,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:06:46,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:06:46,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:06:46,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:06:46,663 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:06:46,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:06:46,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:06:46,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:06:46,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:06:46,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:06:46,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:06:46,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:06:46,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:06:46,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:06:46,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:06:46,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:06:46,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 03:06:46,705 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:06:46,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:06:46,706 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:06:46,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:06:46,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:06:46,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:06:46,709 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:06:46,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:06:46,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:06:46,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:06:46,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:06:46,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:06:46,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:06:46,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:06:46,711 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 03:06:46,711 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 03:06:46,711 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:06:46,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:06:46,712 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:06:46,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:06:46,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:06:46,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:06:46,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:06:46,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:06:46,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:06:46,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:06:46,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:06:46,713 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 03:06:46,714 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 03:06:46,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:06:46,714 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:06:46,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 03:06:46,714 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 [2021-08-26 03:06:47,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:06:47,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:06:47,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:06:47,033 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:06:47,034 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:06:47,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/ludcmp.c [2021-08-26 03:06:47,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7e3c0fec/dac0d20b6c2b4aae9b0a73aac4e3cc06/FLAG76870b860 [2021-08-26 03:06:47,492 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:06:47,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c [2021-08-26 03:06:47,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7e3c0fec/dac0d20b6c2b4aae9b0a73aac4e3cc06/FLAG76870b860 [2021-08-26 03:06:47,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7e3c0fec/dac0d20b6c2b4aae9b0a73aac4e3cc06 [2021-08-26 03:06:47,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:06:47,525 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:06:47,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:06:47,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:06:47,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:06:47,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d1b48e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47, skipping insertion in model container [2021-08-26 03:06:47,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:06:47,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:06:47,700 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/loops/ludcmp.c[318,331] [2021-08-26 03:06:47,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:06:47,765 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:06:47,782 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/loops/ludcmp.c[318,331] [2021-08-26 03:06:47,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:06:47,848 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:06:47,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47 WrapperNode [2021-08-26 03:06:47,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:06:47,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:06:47,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:06:47,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:06:47,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:06:47,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:06:47,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:06:47,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:06:47,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:06:47,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:06:47,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:06:47,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:06:47,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47" (1/1) ... [2021-08-26 03:06:47,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:06:47,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:06:48,006 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 03:06:48,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 03:06:48,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-08-26 03:06:48,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-08-26 03:06:48,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 03:06:48,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:06:48,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:06:48,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:06:48,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 03:07:04,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:07:04,042 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-08-26 03:07:04,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:07:04 BoogieIcfgContainer [2021-08-26 03:07:04,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:07:04,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:07:04,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:07:04,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:07:04,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:06:47" (1/3) ... [2021-08-26 03:07:04,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8952fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:07:04, skipping insertion in model container [2021-08-26 03:07:04,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:06:47" (2/3) ... [2021-08-26 03:07:04,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f8952fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:07:04, skipping insertion in model container [2021-08-26 03:07:04,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:07:04" (3/3) ... [2021-08-26 03:07:04,055 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2021-08-26 03:07:04,060 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:07:04,060 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:07:04,106 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:07:04,112 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 03:07:04,112 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:07:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:07:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 03:07:04,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:07:04,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:07:04,129 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:07:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:07:04,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2021-08-26 03:07:04,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 03:07:04,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740963167] [2021-08-26 03:07:04,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:07:04,143 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 03:07:04,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 03:07:04,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 03:07:04,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 03:07:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:07:04,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 03:07:04,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:07:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:07:04,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 03:07:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:07:04,654 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 03:07:04,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740963167] [2021-08-26 03:07:04,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740963167] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 03:07:04,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:07:04,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-08-26 03:07:04,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93765295] [2021-08-26 03:07:04,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:07:04,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 03:07:04,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:07:04,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:07:04,671 INFO L87 Difference]: Start difference. First operand has 50 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 49 states have internal predecessors, (77), 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 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:07:05,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:07:05,737 INFO L93 Difference]: Finished difference Result 103 states and 162 transitions. [2021-08-26 03:07:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:07:05,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 7 [2021-08-26 03:07:05,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:07:05,753 INFO L225 Difference]: With dead ends: 103 [2021-08-26 03:07:05,754 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 03:07:05,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-08-26 03:07:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 03:07:05,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-26 03:07:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:07:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-08-26 03:07:05,781 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2021-08-26 03:07:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:07:05,782 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-08-26 03:07:05,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:07:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-08-26 03:07:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 03:07:05,782 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:07:05,782 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:07:05,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-08-26 03:07:05,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 03:07:05,984 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:07:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:07:05,984 INFO L82 PathProgramCache]: Analyzing trace with hash 116728450, now seen corresponding path program 1 times [2021-08-26 03:07:05,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 03:07:05,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445739937] [2021-08-26 03:07:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:07:05,986 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 03:07:05,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 03:07:05,987 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 03:07:05,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 03:07:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:07:06,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 03:07:06,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:07:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:07:06,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 03:07:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:07:07,085 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 03:07:07,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445739937] [2021-08-26 03:07:07,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445739937] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 03:07:07,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:07:07,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-26 03:07:07,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056036145] [2021-08-26 03:07:07,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 03:07:07,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 03:07:07,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 03:07:07,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:07:07,089 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:07:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:07:09,552 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2021-08-26 03:07:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:07:09,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 15 [2021-08-26 03:07:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:07:09,555 INFO L225 Difference]: With dead ends: 94 [2021-08-26 03:07:09,555 INFO L226 Difference]: Without dead ends: 78 [2021-08-26 03:07:09,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:07:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-26 03:07:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2021-08-26 03:07:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:07:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-08-26 03:07:09,563 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2021-08-26 03:07:09,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:07:09,563 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-08-26 03:07:09,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:07:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-08-26 03:07:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 03:07:09,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:07:09,564 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:07:09,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:07:09,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 03:07:09,777 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:07:09,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:07:09,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2021-08-26 03:07:09,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 03:07:09,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766639068] [2021-08-26 03:07:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:07:09,779 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 03:07:09,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 03:07:09,785 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 03:07:09,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-26 03:07:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:07:10,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 03:07:10,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:07:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:07:10,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 03:07:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:07:11,103 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 03:07:11,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766639068] [2021-08-26 03:07:11,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766639068] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 03:07:11,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:07:11,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-26 03:07:11,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713825992] [2021-08-26 03:07:11,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 03:07:11,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 03:07:11,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 03:07:11,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:07:11,106 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2021-08-26 03:07:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:07:13,606 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2021-08-26 03:07:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:07:13,620 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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 15 [2021-08-26 03:07:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:07:13,623 INFO L225 Difference]: With dead ends: 121 [2021-08-26 03:07:13,623 INFO L226 Difference]: Without dead ends: 98 [2021-08-26 03:07:13,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 778.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:07:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-26 03:07:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-08-26 03:07:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 97 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:07:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2021-08-26 03:07:13,640 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 15 [2021-08-26 03:07:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:07:13,640 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2021-08-26 03:07:13,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2021-08-26 03:07:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2021-08-26 03:07:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 03:07:13,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:07:13,642 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:07:13,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-26 03:07:13,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 03:07:13,843 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:07:13,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:07:13,844 INFO L82 PathProgramCache]: Analyzing trace with hash -642360546, now seen corresponding path program 2 times [2021-08-26 03:07:13,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 03:07:13,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142241255] [2021-08-26 03:07:13,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:07:13,844 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 03:07:13,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 03:07:13,845 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) [2021-08-26 03:07:13,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-26 03:07:14,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:07:14,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:07:14,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:07:14,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:07:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 03:07:15,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 03:07:16,320 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-26 03:07:16,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 03:07:16,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142241255] [2021-08-26 03:07:16,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142241255] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-26 03:07:16,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:07:16,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-26 03:07:16,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722214502] [2021-08-26 03:07:16,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 03:07:16,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 03:07:16,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 03:07:16,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:07:16,322 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:07:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:07:26,014 INFO L93 Difference]: Finished difference Result 448 states and 518 transitions. [2021-08-26 03:07:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-26 03:07:26,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 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 31 [2021-08-26 03:07:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:07:26,017 INFO L225 Difference]: With dead ends: 448 [2021-08-26 03:07:26,017 INFO L226 Difference]: Without dead ends: 374 [2021-08-26 03:07:26,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 3408.5ms TimeCoverageRelationStatistics Valid=460, Invalid=1100, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 03:07:26,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-08-26 03:07:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 183. [2021-08-26 03:07:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.1538461538461537) internal successors, (210), 182 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:07:26,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 210 transitions. [2021-08-26 03:07:26,044 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 210 transitions. Word has length 31 [2021-08-26 03:07:26,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:07:26,044 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 210 transitions. [2021-08-26 03:07:26,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:07:26,045 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 210 transitions. [2021-08-26 03:07:26,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 03:07:26,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:07:26,046 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:07:26,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-26 03:07:26,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 03:07:26,265 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:07:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:07:26,265 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 3 times [2021-08-26 03:07:26,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 03:07:26,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297224169] [2021-08-26 03:07:26,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:07:26,266 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 03:07:26,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 03:07:26,269 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) [2021-08-26 03:07:26,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-26 03:07:27,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-26 03:07:27,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-26 03:07:27,229 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 03:07:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:07:28,069 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-26 03:07:28,069 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 03:07:28,070 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:07:28,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-26 03:07:28,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 03:07:28,276 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:07:28,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:07:28 BoogieIcfgContainer [2021-08-26 03:07:28,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:07:28,335 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:07:28,335 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:07:28,335 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:07:28,336 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:07:04" (3/4) ... [2021-08-26 03:07:28,337 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 03:07:28,404 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:07:28,407 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:07:28,408 INFO L168 Benchmark]: Toolchain (without parser) took 40882.34 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 42.5 MB in the beginning and 49.0 MB in the end (delta: -6.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:07:28,412 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 62.9 MB. Free memory was 44.6 MB in the beginning and 44.5 MB in the end (delta: 59.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:07:28,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.61 ms. Allocated memory is still 62.9 MB. Free memory was 42.4 MB in the beginning and 43.5 MB in the end (delta: -1.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:07:28,413 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.78 ms. Allocated memory is still 62.9 MB. Free memory was 43.5 MB in the beginning and 41.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:07:28,413 INFO L168 Benchmark]: Boogie Preprocessor took 63.66 ms. Allocated memory is still 62.9 MB. Free memory was 41.1 MB in the beginning and 39.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:07:28,413 INFO L168 Benchmark]: RCFGBuilder took 16069.72 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 38.8 MB in the beginning and 45.9 MB in the end (delta: -7.1 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. [2021-08-26 03:07:28,415 INFO L168 Benchmark]: TraceAbstraction took 24284.43 ms. Allocated memory is still 83.9 MB. Free memory was 45.5 MB in the beginning and 52.6 MB in the end (delta: -7.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:07:28,416 INFO L168 Benchmark]: Witness Printer took 72.04 ms. Allocated memory is still 83.9 MB. Free memory was 52.6 MB in the beginning and 49.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:07:28,417 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 62.9 MB. Free memory was 44.6 MB in the beginning and 44.5 MB in the end (delta: 59.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 322.61 ms. Allocated memory is still 62.9 MB. Free memory was 42.4 MB in the beginning and 43.5 MB in the end (delta: -1.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.78 ms. Allocated memory is still 62.9 MB. Free memory was 43.5 MB in the beginning and 41.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.66 ms. Allocated memory is still 62.9 MB. Free memory was 41.1 MB in the beginning and 39.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 16069.72 ms. Allocated memory was 62.9 MB in the beginning and 83.9 MB in the end (delta: 21.0 MB). Free memory was 38.8 MB in the beginning and 45.9 MB in the end (delta: -7.1 MB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24284.43 ms. Allocated memory is still 83.9 MB. Free memory was 45.5 MB in the beginning and 52.6 MB in the end (delta: -7.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 72.04 ms. Allocated memory is still 83.9 MB. Free memory was 52.6 MB in the beginning and 49.0 MB in the end (delta: 3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L71] double a[50][50], b[50], x[50]; VAL [a={10:0}, b={14:0}, x={11:0}] [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={10:0}, b={14:0}, x={11:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND TRUE i == j [L99] EXPR a[i][j] [L99] a[i][j] *= 10.0 [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={10:0}, b={14:0}, x={11:0}] [L99] COND FALSE !(i == j) VAL [a={10:0}, b={14:0}, x={11:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={10:0}, b={14:0}, x={11:0}] [L96] COND FALSE !(j <= n) VAL [a={10:0}, b={14:0}, x={11:0}] [L6] COND TRUE !(cond) VAL [a={10:0}, b={14:0}, x={11:0}] [L7] reach_error() VAL [a={10:0}, b={14:0}, x={11:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 24170.8ms, OverallIterations: 5, TraceHistogramMax: 6, EmptinessCheckTime: 9.2ms, AutomataDifference: 15778.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 89 SDtfs, 551 SDslu, 257 SDs, 0 SdLazy, 511 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11470.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 4872.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=4, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.0ms AutomataMinimizationTime, 4 MinimizatonAttempts, 222 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 56.3ms SsaConstructionTime, 1831.7ms SatisfiabilityAnalysisTime, 4203.3ms InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 498 SizeOfPredicates, 8 NumberOfNonLiveVariables, 258 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 76/156 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 03:07:28,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...