./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 54858612 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 0.2.0-5485861 [2020-10-25 22:16:33,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:16:33,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:16:33,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:16:33,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:16:33,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:16:33,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:16:33,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:16:33,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:16:33,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:16:33,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:16:33,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:16:33,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:16:33,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:16:33,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:16:33,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:16:33,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:16:33,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:16:33,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:16:33,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:16:33,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:16:33,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:16:33,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:16:33,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:16:33,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:16:33,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:16:33,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:16:33,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:16:33,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:16:33,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:16:33,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:16:33,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:16:33,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:16:33,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:16:33,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:16:33,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:16:33,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:16:33,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:16:33,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:16:33,580 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:16:33,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:16:33,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:16:33,642 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:16:33,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:16:33,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:16:33,645 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:16:33,645 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:16:33,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:16:33,646 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:16:33,646 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:16:33,646 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:16:33,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:16:33,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:16:33,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:16:33,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:16:33,649 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:16:33,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:16:33,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:16:33,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:16:33,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:16:33,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:16:33,651 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:16:33,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:16:33,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:16:33,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:16:33,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:16:33,652 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:16:33,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:16:33,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:16:33,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:16:33,653 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:16:33,653 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 [2020-10-25 22:16:34,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:16:34,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:16:34,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:16:34,089 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:16:34,090 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:16:34,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/ludcmp.c [2020-10-25 22:16:34,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15c78e103/cfe4f36d40e54ebf97f8696860b7746a/FLAG6b599978d [2020-10-25 22:16:34,944 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:16:34,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c [2020-10-25 22:16:34,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15c78e103/cfe4f36d40e54ebf97f8696860b7746a/FLAG6b599978d [2020-10-25 22:16:35,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15c78e103/cfe4f36d40e54ebf97f8696860b7746a [2020-10-25 22:16:35,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:16:35,285 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:16:35,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:16:35,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:16:35,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:16:35,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:16:35" (1/1) ... [2020-10-25 22:16:35,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eae3e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35, skipping insertion in model container [2020-10-25 22:16:35,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:16:35" (1/1) ... [2020-10-25 22:16:35,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:16:35,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:16:35,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:16:35,580 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:16:35,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:16:35,649 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:16:35,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35 WrapperNode [2020-10-25 22:16:35,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:16:35,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:16:35,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:16:35,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:16:35,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35" (1/1) ... [2020-10-25 22:16:35,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35" (1/1) ... [2020-10-25 22:16:35,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:16:35,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:16:35,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:16:35,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:16:35,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35" (1/1) ... [2020-10-25 22:16:35,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35" (1/1) ... [2020-10-25 22:16:35,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35" (1/1) ... [2020-10-25 22:16:35,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35" (1/1) ... [2020-10-25 22:16:35,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35" (1/1) ... [2020-10-25 22:16:35,779 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35" (1/1) ... [2020-10-25 22:16:35,786 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35" (1/1) ... [2020-10-25 22:16:35,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:16:35,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:16:35,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:16:35,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:16:35,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:16:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:16:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:16:35,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-25 22:16:35,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-25 22:16:35,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:16:35,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:16:35,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:16:36,400 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:16:36,401 INFO L298 CfgBuilder]: Removed 23 assume(true) statements. [2020-10-25 22:16:36,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:16:36 BoogieIcfgContainer [2020-10-25 22:16:36,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:16:36,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:16:36,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:16:36,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:16:36,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:16:35" (1/3) ... [2020-10-25 22:16:36,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45dce65e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:16:36, skipping insertion in model container [2020-10-25 22:16:36,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:35" (2/3) ... [2020-10-25 22:16:36,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45dce65e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:16:36, skipping insertion in model container [2020-10-25 22:16:36,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:16:36" (3/3) ... [2020-10-25 22:16:36,412 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2020-10-25 22:16:36,430 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:16:36,436 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:16:36,451 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:16:36,497 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:16:36,497 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:16:36,498 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:16:36,498 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:16:36,498 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:16:36,499 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:16:36,499 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:16:36,499 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:16:36,522 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-25 22:16:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:16:36,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:16:36,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:16:36,533 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:16:36,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:16:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2020-10-25 22:16:36,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:16:36,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506198347] [2020-10-25 22:16:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:16:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:16:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:36,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506198347] [2020-10-25 22:16:36,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:16:36,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 22:16:36,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935453965] [2020-10-25 22:16:36,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 22:16:36,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:16:36,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 22:16:36,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:16:36,923 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 4 states. [2020-10-25 22:16:37,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:16:37,042 INFO L93 Difference]: Finished difference Result 103 states and 160 transitions. [2020-10-25 22:16:37,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 22:16:37,044 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-10-25 22:16:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:16:37,055 INFO L225 Difference]: With dead ends: 103 [2020-10-25 22:16:37,055 INFO L226 Difference]: Without dead ends: 17 [2020-10-25 22:16:37,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 22:16:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-25 22:16:37,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2020-10-25 22:16:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-25 22:16:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-25 22:16:37,095 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2020-10-25 22:16:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:16:37,096 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-25 22:16:37,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 22:16:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-25 22:16:37,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 22:16:37,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:16:37,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:16:37,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:16:37,097 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:16:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:16:37,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1948892579, now seen corresponding path program 1 times [2020-10-25 22:16:37,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:16:37,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925098455] [2020-10-25 22:16:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:16:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:16:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:37,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925098455] [2020-10-25 22:16:37,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156211206] [2020-10-25 22:16:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:16:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:16:37,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 22:16:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:16:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:37,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:16:37,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-25 22:16:37,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879389381] [2020-10-25 22:16:37,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 22:16:37,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:16:37,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 22:16:37,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:16:37,407 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 7 states. [2020-10-25 22:16:37,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:16:37,467 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-10-25 22:16:37,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:16:37,468 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-25 22:16:37,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:16:37,469 INFO L225 Difference]: With dead ends: 33 [2020-10-25 22:16:37,469 INFO L226 Difference]: Without dead ends: 21 [2020-10-25 22:16:37,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:16:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-25 22:16:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-10-25 22:16:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 22:16:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-25 22:16:37,476 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2020-10-25 22:16:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:16:37,477 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-25 22:16:37,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 22:16:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-25 22:16:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 22:16:37,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:16:37,478 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:16:37,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 22:16:37,693 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:16:37,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:16:37,695 INFO L82 PathProgramCache]: Analyzing trace with hash 116728450, now seen corresponding path program 2 times [2020-10-25 22:16:37,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:16:37,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770021948] [2020-10-25 22:16:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:16:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:16:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:37,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770021948] [2020-10-25 22:16:37,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464295572] [2020-10-25 22:16:37,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:16:37,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:16:37,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:16:37,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 22:16:37,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:16:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:37,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-25 22:16:37,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-10-25 22:16:37,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219996456] [2020-10-25 22:16:37,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 22:16:37,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:16:37,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 22:16:37,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:16:37,895 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 5 states. [2020-10-25 22:16:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:16:37,939 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-10-25 22:16:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:16:37,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-25 22:16:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:16:37,940 INFO L225 Difference]: With dead ends: 50 [2020-10-25 22:16:37,940 INFO L226 Difference]: Without dead ends: 34 [2020-10-25 22:16:37,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:16:37,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-25 22:16:37,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-10-25 22:16:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-25 22:16:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-25 22:16:37,947 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2020-10-25 22:16:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:16:37,948 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-25 22:16:37,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 22:16:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-25 22:16:37,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 22:16:37,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:16:37,949 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:16:38,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:16:38,162 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:16:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:16:38,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2020-10-25 22:16:38,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:16:38,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843135481] [2020-10-25 22:16:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:16:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:16:38,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:38,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843135481] [2020-10-25 22:16:38,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684780561] [2020-10-25 22:16:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:16:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:16:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 22:16:38,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:16:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:38,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:16:38,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-25 22:16:38,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009715059] [2020-10-25 22:16:38,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 22:16:38,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:16:38,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 22:16:38,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:16:38,406 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-25 22:16:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:16:38,455 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-10-25 22:16:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:16:38,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-25 22:16:38,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:16:38,457 INFO L225 Difference]: With dead ends: 58 [2020-10-25 22:16:38,457 INFO L226 Difference]: Without dead ends: 42 [2020-10-25 22:16:38,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-10-25 22:16:38,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-25 22:16:38,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-10-25 22:16:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-25 22:16:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-25 22:16:38,465 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 15 [2020-10-25 22:16:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:16:38,466 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-25 22:16:38,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 22:16:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-25 22:16:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-25 22:16:38,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:16:38,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:16:38,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:16:38,682 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:16:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:16:38,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1388100565, now seen corresponding path program 2 times [2020-10-25 22:16:38,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:16:38,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975468175] [2020-10-25 22:16:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:16:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:16:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:38,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975468175] [2020-10-25 22:16:38,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228498970] [2020-10-25 22:16:38,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:16:38,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:16:38,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:16:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 22:16:38,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:16:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:38,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:16:38,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-10-25 22:16:38,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688469930] [2020-10-25 22:16:38,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-25 22:16:38,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:16:38,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-25 22:16:38,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-10-25 22:16:38,945 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 11 states. [2020-10-25 22:16:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:16:38,999 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2020-10-25 22:16:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 22:16:39,000 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-10-25 22:16:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:16:39,001 INFO L225 Difference]: With dead ends: 70 [2020-10-25 22:16:39,001 INFO L226 Difference]: Without dead ends: 50 [2020-10-25 22:16:39,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-10-25 22:16:39,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-25 22:16:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2020-10-25 22:16:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-25 22:16:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-25 22:16:39,009 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 19 [2020-10-25 22:16:39,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:16:39,010 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-25 22:16:39,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-25 22:16:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-25 22:16:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-25 22:16:39,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:16:39,011 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:16:39,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:16:39,224 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:16:39,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:16:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash 756876242, now seen corresponding path program 3 times [2020-10-25 22:16:39,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:16:39,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321413667] [2020-10-25 22:16:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:16:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:16:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:39,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321413667] [2020-10-25 22:16:39,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443068015] [2020-10-25 22:16:39,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:16:39,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-25 22:16:39,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:16:39,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:16:39,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:16:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:39,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:16:39,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2020-10-25 22:16:39,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785360210] [2020-10-25 22:16:39,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-25 22:16:39,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:16:39,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-25 22:16:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-25 22:16:39,470 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 13 states. [2020-10-25 22:16:39,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:16:39,534 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2020-10-25 22:16:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 22:16:39,535 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-25 22:16:39,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:16:39,536 INFO L225 Difference]: With dead ends: 82 [2020-10-25 22:16:39,536 INFO L226 Difference]: Without dead ends: 58 [2020-10-25 22:16:39,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-25 22:16:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-25 22:16:39,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-25 22:16:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-25 22:16:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-25 22:16:39,544 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 23 [2020-10-25 22:16:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:16:39,545 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-25 22:16:39,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-25 22:16:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-25 22:16:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-25 22:16:39,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:16:39,547 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:16:39,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-25 22:16:39,762 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:16:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:16:39,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1523542023, now seen corresponding path program 4 times [2020-10-25 22:16:39,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:16:39,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462508558] [2020-10-25 22:16:39,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:16:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:16:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:39,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462508558] [2020-10-25 22:16:39,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995270813] [2020-10-25 22:16:39,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:16:39,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 22:16:39,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:16:39,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 22:16:39,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:16:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:40,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:16:40,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-10-25 22:16:40,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502110297] [2020-10-25 22:16:40,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-25 22:16:40,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:16:40,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-25 22:16:40,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2020-10-25 22:16:40,021 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 15 states. [2020-10-25 22:16:40,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:16:40,112 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2020-10-25 22:16:40,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-25 22:16:40,113 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-25 22:16:40,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:16:40,114 INFO L225 Difference]: With dead ends: 94 [2020-10-25 22:16:40,114 INFO L226 Difference]: Without dead ends: 66 [2020-10-25 22:16:40,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2020-10-25 22:16:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-25 22:16:40,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-10-25 22:16:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-25 22:16:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-10-25 22:16:40,122 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 27 [2020-10-25 22:16:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:16:40,122 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-10-25 22:16:40,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-25 22:16:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-10-25 22:16:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-25 22:16:40,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:16:40,123 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:16:40,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:16:40,337 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:16:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:16:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 5 times [2020-10-25 22:16:40,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:16:40,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806753400] [2020-10-25 22:16:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:16:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:16:40,367 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:16:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:16:40,399 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:16:40,437 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:16:40,438 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:16:40,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-25 22:16:40,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:16:40 BoogieIcfgContainer [2020-10-25 22:16:40,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:16:40,534 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:16:40,534 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:16:40,535 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:16:40,535 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:16:36" (3/4) ... [2020-10-25 22:16:40,539 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-25 22:16:40,539 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:16:40,542 INFO L168 Benchmark]: Toolchain (without parser) took 5260.04 ms. Allocated memory was 41.9 MB in the beginning and 83.9 MB in the end (delta: 41.9 MB). Free memory was 18.7 MB in the beginning and 31.2 MB in the end (delta: -12.5 MB). Peak memory consumption was 31.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:16:40,543 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 41.9 MB. Free memory is still 26.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:16:40,544 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.72 ms. Allocated memory is still 41.9 MB. Free memory was 18.0 MB in the beginning and 17.7 MB in the end (delta: 377.9 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:16:40,550 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.65 ms. Allocated memory was 41.9 MB in the beginning and 56.6 MB in the end (delta: 14.7 MB). Free memory was 17.7 MB in the beginning and 39.9 MB in the end (delta: -22.2 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-10-25 22:16:40,551 INFO L168 Benchmark]: Boogie Preprocessor took 80.54 ms. Allocated memory is still 56.6 MB. Free memory was 39.9 MB in the beginning and 37.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:16:40,554 INFO L168 Benchmark]: RCFGBuilder took 607.08 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 24.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:16:40,558 INFO L168 Benchmark]: TraceAbstraction took 4129.12 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 24.1 MB in the beginning and 31.8 MB in the end (delta: -7.8 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:16:40,559 INFO L168 Benchmark]: Witness Printer took 4.82 ms. Allocated memory is still 83.9 MB. Free memory is still 31.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:16:40,568 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 41.9 MB. Free memory is still 26.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 364.72 ms. Allocated memory is still 41.9 MB. Free memory was 18.0 MB in the beginning and 17.7 MB in the end (delta: 377.9 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.65 ms. Allocated memory was 41.9 MB in the beginning and 56.6 MB in the end (delta: 14.7 MB). Free memory was 17.7 MB in the beginning and 39.9 MB in the end (delta: -22.2 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 80.54 ms. Allocated memory is still 56.6 MB. Free memory was 39.9 MB in the beginning and 37.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 607.08 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 24.9 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4129.12 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 24.1 MB in the beginning and 31.8 MB in the end (delta: -7.8 MB). Peak memory consumption was 19.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.82 ms. Allocated memory is still 83.9 MB. Free memory is still 31.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() 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={4:0}, b={3:0}, x={5:0}] [L88] int i, j, nmax = 50, n = 5, chkerr; [L89] double eps, w; [L91] eps = 1.0e-6 [L93] i = 0 VAL [a={4:0}, b={3:0}, x={5:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [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={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={3:0}, x={5:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={3:0}, x={5:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={3:0}, x={5:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={3:0}, x={5:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={4:0}, b={3:0}, x={5:0}] [L99] COND FALSE !(i == j) VAL [a={4:0}, b={3:0}, x={5:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={4:0}, b={3:0}, x={5:0}] [L96] COND FALSE !(j <= n) VAL [a={4:0}, b={3:0}, x={5:0}] [L6] COND TRUE !(cond) VAL [a={4:0}, b={3:0}, x={5:0}] [L3] __assert_fail("0", "ludcmp.c", 3, "reach_error") VAL [a={4:0}, b={3:0}, x={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.9s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 109 SDtfs, 374 SDslu, 239 SDs, 0 SdLazy, 217 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 149 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 36 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 258 NumberOfCodeBlocks, 258 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 214 ConstructedInterpolants, 0 QuantifiedInterpolants, 19428 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 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-5485861 [2020-10-25 22:16:43,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:16:43,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:16:43,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:16:43,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:16:43,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:16:43,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:16:43,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:16:43,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:16:43,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:16:43,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:16:43,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:16:43,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:16:43,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:16:43,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:16:43,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:16:43,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:16:43,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:16:43,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:16:43,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:16:43,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:16:43,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:16:43,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:16:43,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:16:43,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:16:43,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:16:43,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:16:43,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:16:43,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:16:43,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:16:43,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:16:43,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:16:43,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:16:43,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:16:43,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:16:43,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:16:43,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:16:43,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:16:43,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:16:43,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:16:43,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:16:43,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-25 22:16:43,188 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:16:43,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:16:43,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:16:43,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:16:43,190 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:16:43,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:16:43,191 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:16:43,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:16:43,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:16:43,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:16:43,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:16:43,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:16:43,193 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-25 22:16:43,194 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-25 22:16:43,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:16:43,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:16:43,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:16:43,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:16:43,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:16:43,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:16:43,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:16:43,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:16:43,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:16:43,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:16:43,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:16:43,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:16:43,198 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-25 22:16:43,199 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-25 22:16:43,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:16:43,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:16:43,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-25 22:16:43,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0546d8df91f3f30520fbe3b4dbdbfd43e8efce3 [2020-10-25 22:16:43,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:16:43,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:16:43,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:16:43,635 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:16:43,636 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:16:43,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/ludcmp.c [2020-10-25 22:16:43,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fdf76a8f/be6e35740e284674ba7e3b7a0ebcc9f3/FLAG2dffc2a0d [2020-10-25 22:16:44,301 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:16:44,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/ludcmp.c [2020-10-25 22:16:44,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fdf76a8f/be6e35740e284674ba7e3b7a0ebcc9f3/FLAG2dffc2a0d [2020-10-25 22:16:44,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1fdf76a8f/be6e35740e284674ba7e3b7a0ebcc9f3 [2020-10-25 22:16:44,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:16:44,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:16:44,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:16:44,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:16:44,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:16:44,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:16:44" (1/1) ... [2020-10-25 22:16:44,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d637b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:44, skipping insertion in model container [2020-10-25 22:16:44,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:16:44" (1/1) ... [2020-10-25 22:16:44,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:16:44,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:16:44,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:16:45,005 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:16:45,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:16:45,096 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:16:45,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45 WrapperNode [2020-10-25 22:16:45,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:16:45,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:16:45,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:16:45,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:16:45,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45" (1/1) ... [2020-10-25 22:16:45,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45" (1/1) ... [2020-10-25 22:16:45,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:16:45,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:16:45,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:16:45,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:16:45,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45" (1/1) ... [2020-10-25 22:16:45,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45" (1/1) ... [2020-10-25 22:16:45,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45" (1/1) ... [2020-10-25 22:16:45,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45" (1/1) ... [2020-10-25 22:16:45,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45" (1/1) ... [2020-10-25 22:16:45,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45" (1/1) ... [2020-10-25 22:16:45,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45" (1/1) ... [2020-10-25 22:16:45,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:16:45,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:16:45,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:16:45,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:16:45,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:16:45,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2020-10-25 22:16:45,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-10-25 22:16:45,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-25 22:16:45,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:16:45,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:16:45,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:16:45,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:16:57,232 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:16:57,233 INFO L298 CfgBuilder]: Removed 23 assume(true) statements. [2020-10-25 22:16:57,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:16:57 BoogieIcfgContainer [2020-10-25 22:16:57,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:16:57,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:16:57,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:16:57,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:16:57,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:16:44" (1/3) ... [2020-10-25 22:16:57,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718db91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:16:57, skipping insertion in model container [2020-10-25 22:16:57,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:16:45" (2/3) ... [2020-10-25 22:16:57,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718db91b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:16:57, skipping insertion in model container [2020-10-25 22:16:57,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:16:57" (3/3) ... [2020-10-25 22:16:57,244 INFO L111 eAbstractionObserver]: Analyzing ICFG ludcmp.c [2020-10-25 22:16:57,256 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:16:57,261 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:16:57,275 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:16:57,303 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:16:57,303 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:16:57,303 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:16:57,303 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:16:57,304 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:16:57,304 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:16:57,304 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:16:57,304 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:16:57,319 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-10-25 22:16:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:16:57,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:16:57,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:16:57,327 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:16:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:16:57,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1809811384, now seen corresponding path program 1 times [2020-10-25 22:16:57,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:16:57,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881606388] [2020-10-25 22:16:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-25 22:16:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:16:57,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-25 22:16:57,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:16:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:57,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:16:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:57,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881606388] [2020-10-25 22:16:57,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:16:57,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-25 22:16:57,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569529600] [2020-10-25 22:16:57,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:16:57,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:16:57,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:16:57,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:16:57,671 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 6 states. [2020-10-25 22:16:58,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:16:58,678 INFO L93 Difference]: Finished difference Result 104 states and 163 transitions. [2020-10-25 22:16:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 22:16:58,691 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-10-25 22:16:58,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:16:58,700 INFO L225 Difference]: With dead ends: 104 [2020-10-25 22:16:58,700 INFO L226 Difference]: Without dead ends: 18 [2020-10-25 22:16:58,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-25 22:16:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-25 22:16:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-25 22:16:58,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 22:16:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-25 22:16:58,733 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7 [2020-10-25 22:16:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:16:58,734 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-25 22:16:58,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:16:58,734 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-25 22:16:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 22:16:58,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:16:58,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:16:58,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-25 22:16:58,937 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:16:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:16:58,939 INFO L82 PathProgramCache]: Analyzing trace with hash 116728450, now seen corresponding path program 1 times [2020-10-25 22:16:58,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:16:58,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271864835] [2020-10-25 22:16:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-25 22:16:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:16:59,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-25 22:16:59,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:16:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:59,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:16:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:16:59,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271864835] [2020-10-25 22:16:59,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:16:59,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-25 22:16:59,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479646425] [2020-10-25 22:16:59,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 22:16:59,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:16:59,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 22:16:59,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:16:59,481 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 8 states. [2020-10-25 22:17:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:01,569 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-10-25 22:17:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 22:17:01,570 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-10-25 22:17:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:01,574 INFO L225 Difference]: With dead ends: 94 [2020-10-25 22:17:01,574 INFO L226 Difference]: Without dead ends: 78 [2020-10-25 22:17:01,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:17:01,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-25 22:17:01,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2020-10-25 22:17:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-25 22:17:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-10-25 22:17:01,596 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 15 [2020-10-25 22:17:01,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:01,596 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-10-25 22:17:01,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 22:17:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-10-25 22:17:01,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 22:17:01,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:01,598 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:01,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-25 22:17:01,813 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:01,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1891735812, now seen corresponding path program 1 times [2020-10-25 22:17:01,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:17:01,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649266465] [2020-10-25 22:17:01,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-25 22:17:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:17:02,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-25 22:17:02,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:17:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:02,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:17:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:17:02,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649266465] [2020-10-25 22:17:02,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:17:02,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-25 22:17:02,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764551001] [2020-10-25 22:17:02,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 22:17:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:17:02,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 22:17:02,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-25 22:17:02,327 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 10 states. [2020-10-25 22:17:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:04,132 INFO L93 Difference]: Finished difference Result 121 states and 152 transitions. [2020-10-25 22:17:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 22:17:04,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-10-25 22:17:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:04,148 INFO L225 Difference]: With dead ends: 121 [2020-10-25 22:17:04,148 INFO L226 Difference]: Without dead ends: 98 [2020-10-25 22:17:04,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-25 22:17:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-25 22:17:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-25 22:17:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-25 22:17:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 112 transitions. [2020-10-25 22:17:04,165 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 112 transitions. Word has length 15 [2020-10-25 22:17:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:04,166 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 112 transitions. [2020-10-25 22:17:04,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 22:17:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 112 transitions. [2020-10-25 22:17:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-25 22:17:04,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:04,168 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:04,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-25 22:17:04,372 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:04,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:04,374 INFO L82 PathProgramCache]: Analyzing trace with hash -642360546, now seen corresponding path program 2 times [2020-10-25 22:17:04,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:17:04,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039948486] [2020-10-25 22:17:04,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-25 22:17:05,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:17:05,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:17:05,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-25 22:17:05,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:17:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-25 22:17:05,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:17:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-25 22:17:05,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039948486] [2020-10-25 22:17:05,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:17:05,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-25 22:17:05,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256105769] [2020-10-25 22:17:05,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-25 22:17:05,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:17:05,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-25 22:17:05,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-25 22:17:05,367 INFO L87 Difference]: Start difference. First operand 98 states and 112 transitions. Second operand 14 states. [2020-10-25 22:17:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:17:11,687 INFO L93 Difference]: Finished difference Result 448 states and 518 transitions. [2020-10-25 22:17:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-25 22:17:11,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-25 22:17:11,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:17:11,691 INFO L225 Difference]: With dead ends: 448 [2020-10-25 22:17:11,693 INFO L226 Difference]: Without dead ends: 374 [2020-10-25 22:17:11,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=460, Invalid=1100, Unknown=0, NotChecked=0, Total=1560 [2020-10-25 22:17:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-25 22:17:11,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 183. [2020-10-25 22:17:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-25 22:17:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 210 transitions. [2020-10-25 22:17:11,730 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 210 transitions. Word has length 31 [2020-10-25 22:17:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:17:11,730 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 210 transitions. [2020-10-25 22:17:11,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-25 22:17:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 210 transitions. [2020-10-25 22:17:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-25 22:17:11,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:17:11,732 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:17:11,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-25 22:17:11,946 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:17:11,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:17:11,947 INFO L82 PathProgramCache]: Analyzing trace with hash 58704032, now seen corresponding path program 3 times [2020-10-25 22:17:11,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:17:11,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209589778] [2020-10-25 22:17:11,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-25 22:17:13,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-25 22:17:13,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-25 22:17:13,254 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:17:14,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:17:14,255 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:17:14,397 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-25 22:17:14,398 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:17:14,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-25 22:17:14,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:17:14 BoogieIcfgContainer [2020-10-25 22:17:14,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:17:14,692 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:17:14,692 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:17:14,692 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:17:14,692 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:16:57" (3/4) ... [2020-10-25 22:17:14,695 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:17:14,801 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:17:14,804 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:17:14,807 INFO L168 Benchmark]: Toolchain (without parser) took 30107.89 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.5 MB in the beginning and 23.8 MB in the end (delta: 7.7 MB). Peak memory consumption was 22.8 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:14,808 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 39.8 MB. Free memory is still 17.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:17:14,809 INFO L168 Benchmark]: CACSL2BoogieTranslator took 391.90 ms. Allocated memory is still 54.5 MB. Free memory was 30.9 MB in the beginning and 31.4 MB in the end (delta: -480.3 kB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:14,813 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.31 ms. Allocated memory is still 54.5 MB. Free memory was 31.2 MB in the beginning and 29.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:14,813 INFO L168 Benchmark]: Boogie Preprocessor took 48.28 ms. Allocated memory is still 54.5 MB. Free memory was 29.0 MB in the beginning and 26.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:14,815 INFO L168 Benchmark]: RCFGBuilder took 12023.99 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 26.7 MB in the beginning and 48.8 MB in the end (delta: -22.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:14,820 INFO L168 Benchmark]: TraceAbstraction took 17454.27 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 27.9 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:14,821 INFO L168 Benchmark]: Witness Printer took 112.94 ms. Allocated memory is still 67.1 MB. Free memory was 27.4 MB in the beginning and 23.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:17:14,824 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 39.8 MB. Free memory is still 17.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 391.90 ms. Allocated memory is still 54.5 MB. Free memory was 30.9 MB in the beginning and 31.4 MB in the end (delta: -480.3 kB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.31 ms. Allocated memory is still 54.5 MB. Free memory was 31.2 MB in the beginning and 29.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.28 ms. Allocated memory is still 54.5 MB. Free memory was 29.0 MB in the beginning and 26.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 12023.99 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 26.7 MB in the beginning and 48.8 MB in the end (delta: -22.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17454.27 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 27.9 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. * Witness Printer took 112.94 ms. Allocated memory is still 67.1 MB. Free memory was 27.4 MB in the beginning and 23.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L71] double a[50][50], b[50], x[50]; VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [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={2:0}, x={-2147483645:0}] [L93] COND TRUE i <= n [L95] w = 0.0 [L96] j = 0 VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [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={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L96] COND TRUE j <= n [L98] a[i][j] = (i + 1) + (j + 1) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L99] COND FALSE !(i == j) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L100] EXPR a[i][j] [L100] w += a[i][j] [L96] j++ VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L96] COND FALSE !(j <= n) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L6] COND TRUE !(cond) VAL [a={7:0}, b={2:0}, x={-2147483645:0}] [L3] __assert_fail("0", "ludcmp.c", 3, "reach_error") VAL [a={7:0}, b={2:0}, x={-2147483645:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 17.2s, OverallIterations: 5, TraceHistogramMax: 6, AutomataDifference: 11.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 89 SDtfs, 604 SDslu, 254 SDs, 0 SdLazy, 494 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 222 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 99 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 11400 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! Received shutdown request...