./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test23-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/ldv-regression/test23-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b974f281a213c0803f91ef44d205e442fb2a5f8f ..................................................................................................................................................................................................................................................................................... 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 -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/ldv-regression/test23-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b974f281a213c0803f91ef44d205e442fb2a5f8f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-11-28 16:57:35,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:57:35,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:57:35,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:57:35,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:57:35,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:57:35,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:57:35,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:57:35,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:57:35,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:57:35,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:57:35,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:57:35,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:57:35,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:57:35,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:57:35,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:57:35,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:57:35,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:57:35,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:57:35,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:57:35,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:57:35,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:57:35,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:57:35,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:57:35,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:57:35,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:57:35,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:57:35,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:57:35,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:57:35,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:57:35,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:57:35,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:57:35,646 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:57:35,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:57:35,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:57:35,648 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:57:35,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:57:35,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:57:35,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:57:35,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:57:35,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:57:35,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:57:35,687 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:57:35,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:57:35,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:57:35,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:57:35,689 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:57:35,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:57:35,690 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:57:35,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:57:35,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:57:35,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:57:35,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:57:35,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:57:35,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:57:35,694 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:57:35,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:57:35,695 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:57:35,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:57:35,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:57:35,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:57:35,696 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:57:35,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:57:35,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:57:35,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:57:35,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:57:35,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:57:35,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:57:35,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:57:35,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:57:35,698 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:57:35,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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(__VERIFIER_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 -> b974f281a213c0803f91ef44d205e442fb2a5f8f [2019-11-28 16:57:35,997 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:57:36,010 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:57:36,014 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:57:36,016 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:57:36,016 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:57:36,017 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test23-1.c [2019-11-28 16:57:36,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abbc469ef/7bee280a2a754e06b568e90d6e192815/FLAG288b54b10 [2019-11-28 16:57:36,524 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:57:36,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test23-1.c [2019-11-28 16:57:36,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abbc469ef/7bee280a2a754e06b568e90d6e192815/FLAG288b54b10 [2019-11-28 16:57:36,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abbc469ef/7bee280a2a754e06b568e90d6e192815 [2019-11-28 16:57:36,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:57:36,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:57:36,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:36,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:57:36,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:57:36,944 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:36" (1/1) ... [2019-11-28 16:57:36,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28463d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:36, skipping insertion in model container [2019-11-28 16:57:36,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:36" (1/1) ... [2019-11-28 16:57:36,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:57:36,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:57:37,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:37,212 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:57:37,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:37,314 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:57:37,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37 WrapperNode [2019-11-28 16:57:37,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:37,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:37,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:57:37,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:57:37,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,334 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,359 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:37,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:57:37,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:57:37,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:57:37,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... [2019-11-28 16:57:37,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:57:37,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:57:37,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:57:37,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:57:37,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:57:37,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 16:57:37,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:57:37,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:57:37,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 16:57:37,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 16:57:37,784 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:57:37,784 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-28 16:57:37,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:37 BoogieIcfgContainer [2019-11-28 16:57:37,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:57:37,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:57:37,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:57:37,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:57:37,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:57:36" (1/3) ... [2019-11-28 16:57:37,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be87a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:37, skipping insertion in model container [2019-11-28 16:57:37,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:37" (2/3) ... [2019-11-28 16:57:37,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be87a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:37, skipping insertion in model container [2019-11-28 16:57:37,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:37" (3/3) ... [2019-11-28 16:57:37,798 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-1.c [2019-11-28 16:57:37,806 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:57:37,814 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 16:57:37,824 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 16:57:37,844 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:57:37,845 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:57:37,845 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:57:37,845 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:57:37,845 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:57:37,845 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:57:37,845 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:57:37,845 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:57:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-28 16:57:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 16:57:37,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:37,873 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:37,873 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:37,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2019-11-28 16:57:37,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:37,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742464794] [2019-11-28 16:57:37,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:38,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742464794] [2019-11-28 16:57:38,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:57:38,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 16:57:38,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133698073] [2019-11-28 16:57:38,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 16:57:38,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:57:38,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 16:57:38,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:57:38,080 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-28 16:57:38,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:38,094 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-28 16:57:38,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 16:57:38,096 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-11-28 16:57:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:38,106 INFO L225 Difference]: With dead ends: 30 [2019-11-28 16:57:38,107 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 16:57:38,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:57:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 16:57:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 16:57:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 16:57:38,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-28 16:57:38,142 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2019-11-28 16:57:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:38,142 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-28 16:57:38,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 16:57:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-28 16:57:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 16:57:38,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:38,143 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:38,144 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:38,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:38,144 INFO L82 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2019-11-28 16:57:38,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:57:38,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914049019] [2019-11-28 16:57:38,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:57:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:38,440 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Undeclared function symbol (const Int) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1315) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1196) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.TermTransferrer.convertApplicationTerm(TermTransferrer.java:182) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computePredicates(NestedInterpolantsBuilder.java:573) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:171) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:300) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:202) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:139) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:126) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-28 16:57:38,447 INFO L168 Benchmark]: Toolchain (without parser) took 1507.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -102.2 MB). Peak memory consumption was 25.7 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:38,448 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:57:38,451 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -156.0 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:38,452 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:57:38,453 INFO L168 Benchmark]: Boogie Preprocessor took 31.53 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:57:38,454 INFO L168 Benchmark]: RCFGBuilder took 394.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:38,455 INFO L168 Benchmark]: TraceAbstraction took 657.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.4 MB). Peak memory consumption was 33.4 MB. Max. memory is 11.5 GB. [2019-11-28 16:57:38,466 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 375.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -156.0 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.53 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 394.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 657.47 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 33.4 MB). Peak memory consumption was 33.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Undeclared function symbol (const Int) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Undeclared function symbol (const Int): de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-f470102 [2019-11-28 16:57:40,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:57:40,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:57:40,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:57:40,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:57:40,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:57:40,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:57:40,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:57:40,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:57:40,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:57:40,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:57:40,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:57:40,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:57:40,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:57:40,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:57:40,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:57:40,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:57:40,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:57:40,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:57:40,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:57:40,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:57:40,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:57:40,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:57:40,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:57:40,430 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:57:40,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:57:40,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:57:40,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:57:40,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:57:40,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:57:40,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:57:40,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:57:40,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:57:40,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:57:40,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:57:40,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:57:40,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:57:40,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:57:40,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:57:40,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:57:40,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:57:40,443 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-28 16:57:40,479 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:57:40,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:57:40,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:57:40,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:57:40,481 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:57:40,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:57:40,482 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:57:40,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:57:40,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:57:40,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:57:40,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:57:40,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:57:40,483 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-28 16:57:40,483 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-28 16:57:40,483 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:57:40,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:57:40,484 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:57:40,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:57:40,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:57:40,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:57:40,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:57:40,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:57:40,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:57:40,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:57:40,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:57:40,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:57:40,486 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-28 16:57:40,486 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-28 16:57:40,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:57:40,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:57:40,487 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-28 16:57:40,487 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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(__VERIFIER_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 -> b974f281a213c0803f91ef44d205e442fb2a5f8f [2019-11-28 16:57:40,822 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:57:40,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:57:40,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:57:40,848 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:57:40,849 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:57:40,850 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test23-1.c [2019-11-28 16:57:40,925 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8fcf8fa4/528d98a3b4b940828d9888c0d5447271/FLAG0ddccb18b [2019-11-28 16:57:41,396 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:57:41,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test23-1.c [2019-11-28 16:57:41,404 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8fcf8fa4/528d98a3b4b940828d9888c0d5447271/FLAG0ddccb18b [2019-11-28 16:57:41,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8fcf8fa4/528d98a3b4b940828d9888c0d5447271 [2019-11-28 16:57:41,786 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:57:41,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:57:41,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:41,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:57:41,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:57:41,794 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:41" (1/1) ... [2019-11-28 16:57:41,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fdf04fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:41, skipping insertion in model container [2019-11-28 16:57:41,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:57:41" (1/1) ... [2019-11-28 16:57:41,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:57:41,828 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:57:42,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:42,115 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:57:42,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:57:42,244 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:57:42,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42 WrapperNode [2019-11-28 16:57:42,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:57:42,246 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:42,246 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:57:42,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:57:42,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:57:42,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:57:42,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:57:42,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:57:42,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (1/1) ... [2019-11-28 16:57:42,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:57:42,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:57:42,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:57:42,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:57:42,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (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 [2019-11-28 16:57:42,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-28 16:57:42,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:57:42,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:57:42,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 16:57:42,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-28 16:57:42,699 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:57:42,699 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-28 16:57:42,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:42 BoogieIcfgContainer [2019-11-28 16:57:42,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:57:42,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:57:42,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:57:42,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:57:42,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:57:41" (1/3) ... [2019-11-28 16:57:42,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23eb60a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:42, skipping insertion in model container [2019-11-28 16:57:42,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:57:42" (2/3) ... [2019-11-28 16:57:42,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23eb60a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:57:42, skipping insertion in model container [2019-11-28 16:57:42,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:42" (3/3) ... [2019-11-28 16:57:42,729 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-1.c [2019-11-28 16:57:42,756 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:57:42,767 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 16:57:42,787 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 16:57:42,833 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:57:42,833 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:57:42,834 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:57:42,834 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:57:42,834 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:57:42,834 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:57:42,834 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:57:42,835 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:57:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-28 16:57:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 16:57:42,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:42,859 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:42,860 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:42,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2019-11-28 16:57:42,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:57:42,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500909722] [2019-11-28 16:57:42,877 INFO L94 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 [2019-11-28 16:57:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:43,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-28 16:57:43,008 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:43,025 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:57:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:43,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500909722] [2019-11-28 16:57:43,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:57:43,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-28 16:57:43,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976337844] [2019-11-28 16:57:43,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 16:57:43,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:57:43,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 16:57:43,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:57:43,061 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-28 16:57:43,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:43,079 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-28 16:57:43,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 16:57:43,080 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-11-28 16:57:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:43,089 INFO L225 Difference]: With dead ends: 30 [2019-11-28 16:57:43,089 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 16:57:43,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:57:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 16:57:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 16:57:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 16:57:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-28 16:57:43,123 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2019-11-28 16:57:43,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:43,124 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-28 16:57:43,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 16:57:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-28 16:57:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 16:57:43,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:43,125 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:43,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2019-11-28 16:57:43,328 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2019-11-28 16:57:43,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:57:43,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303174954] [2019-11-28 16:57:43,330 INFO L94 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 [2019-11-28 16:57:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:43,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 16:57:43,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:43,652 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-28 16:57:43,653 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 16:57:43,675 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 16:57:43,677 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 16:57:43,677 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2019-11-28 16:57:43,755 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2019-11-28 16:57:43,759 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 16:57:43,779 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 16:57:43,780 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 16:57:43,780 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:16 [2019-11-28 16:57:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:43,858 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:57:43,969 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 46 [2019-11-28 16:57:43,972 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-28 16:57:44,044 INFO L614 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2019-11-28 16:57:44,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 16:57:44,053 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-28 16:57:44,056 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:33 [2019-11-28 16:57:44,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 16:57:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:44,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303174954] [2019-11-28 16:57:44,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:57:44,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2019-11-28 16:57:44,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282402613] [2019-11-28 16:57:44,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 16:57:44,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:57:44,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 16:57:44,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-11-28 16:57:44,133 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 12 states. [2019-11-28 16:57:45,051 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2019-11-28 16:57:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:46,122 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2019-11-28 16:57:46,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-28 16:57:46,129 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-11-28 16:57:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:46,130 INFO L225 Difference]: With dead ends: 71 [2019-11-28 16:57:46,131 INFO L226 Difference]: Without dead ends: 66 [2019-11-28 16:57:46,134 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2019-11-28 16:57:46,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-28 16:57:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 21. [2019-11-28 16:57:46,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-28 16:57:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-28 16:57:46,142 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-11-28 16:57:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:46,143 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-28 16:57:46,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 16:57:46,143 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-28 16:57:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-28 16:57:46,144 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:46,144 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:46,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2019-11-28 16:57:46,356 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:46,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1495361690, now seen corresponding path program 1 times [2019-11-28 16:57:46,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:57:46,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105838983] [2019-11-28 16:57:46,362 INFO L94 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 [2019-11-28 16:57:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:57:46,431 INFO L264 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 16:57:46,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:46,540 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-28 16:57:46,540 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 16:57:46,557 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 16:57:46,558 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 16:57:46,559 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2019-11-28 16:57:46,711 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2019-11-28 16:57:46,712 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 16:57:46,726 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 16:57:46,727 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 16:57:46,727 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:16 [2019-11-28 16:57:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:46,791 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:57:47,012 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2019-11-28 16:57:47,014 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-28 16:57:47,069 INFO L614 ElimStorePlain]: treesize reduction 25, result has 55.4 percent of original size [2019-11-28 16:57:47,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 16:57:47,079 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-28 16:57:47,079 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:31 [2019-11-28 16:57:47,080 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 16:57:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:47,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105838983] [2019-11-28 16:57:47,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:47,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2019-11-28 16:57:47,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189052182] [2019-11-28 16:57:47,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 16:57:47,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:57:47,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 16:57:47,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-28 16:57:47,135 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 16 states. [2019-11-28 16:57:48,045 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2019-11-28 16:57:49,448 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2019-11-28 16:57:49,599 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-28 16:57:50,019 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2019-11-28 16:57:50,517 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2019-11-28 16:57:51,431 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2019-11-28 16:57:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:57:52,531 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2019-11-28 16:57:52,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-11-28 16:57:52,533 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-11-28 16:57:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:57:52,535 INFO L225 Difference]: With dead ends: 103 [2019-11-28 16:57:52,535 INFO L226 Difference]: Without dead ends: 98 [2019-11-28 16:57:52,538 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=952, Invalid=3740, Unknown=0, NotChecked=0, Total=4692 [2019-11-28 16:57:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-28 16:57:52,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 29. [2019-11-28 16:57:52,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 16:57:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-28 16:57:52,550 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2019-11-28 16:57:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:57:52,553 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-28 16:57:52,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 16:57:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-28 16:57:52,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-28 16:57:52,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:57:52,554 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:57:52,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2019-11-28 16:57:52,756 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:57:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:57:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash -597070086, now seen corresponding path program 2 times [2019-11-28 16:57:52,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:57:52,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816175177] [2019-11-28 16:57:52,758 INFO L92 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 [2019-11-28 16:57:52,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 16:57:52,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 16:57:52,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-28 16:57:52,840 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:57:52,940 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-28 16:57:52,941 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 16:57:52,957 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 16:57:52,959 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 16:57:52,959 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:24 [2019-11-28 16:57:53,482 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2019-11-28 16:57:53,483 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 16:57:53,493 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 16:57:53,494 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 16:57:53,494 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:12 [2019-11-28 16:57:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:53,581 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-11-28 16:57:54,403 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2019-11-28 16:57:54,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 16:57:54,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 16:57:54,405 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 16:57:54,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 16:57:54,409 INFO L534 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-28 16:57:54,516 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2019-11-28 16:57:54,517 INFO L614 ElimStorePlain]: treesize reduction 73, result has 36.0 percent of original size [2019-11-28 16:57:54,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 16:57:54,521 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-28 16:57:54,521 INFO L239 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:41 [2019-11-28 16:57:54,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 16:57:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:57:54,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816175177] [2019-11-28 16:57:54,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:57:54,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2019-11-28 16:57:54,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079497492] [2019-11-28 16:57:54,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-28 16:57:54,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-28 16:57:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-28 16:57:54,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2019-11-28 16:57:54,563 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 26 states. [2019-11-28 16:58:00,656 WARN L192 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2019-11-28 16:58:01,110 WARN L192 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2019-11-28 16:58:01,671 WARN L192 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2019-11-28 16:58:02,256 WARN L192 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2019-11-28 16:58:02,744 WARN L192 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2019-11-28 16:58:03,261 WARN L192 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2019-11-28 16:58:03,824 WARN L192 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2019-11-28 16:58:04,326 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-11-28 16:58:04,785 WARN L192 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-11-28 16:58:05,229 WARN L192 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2019-11-28 16:58:05,732 WARN L192 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2019-11-28 16:58:06,252 WARN L192 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2019-11-28 16:58:06,624 WARN L192 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2019-11-28 16:58:07,051 WARN L192 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-11-28 16:58:07,508 WARN L192 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-11-28 16:58:07,972 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2019-11-28 16:58:08,353 WARN L192 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-11-28 16:58:08,714 WARN L192 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2019-11-28 16:58:09,073 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2019-11-28 16:58:09,497 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2019-11-28 16:58:09,885 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2019-11-28 16:58:10,261 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2019-11-28 16:58:10,652 WARN L192 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2019-11-28 16:58:11,101 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2019-11-28 16:58:11,405 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2019-11-28 16:58:12,445 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-11-28 16:58:13,483 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2019-11-28 16:58:14,327 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-11-28 16:58:15,533 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2019-11-28 16:58:16,303 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2019-11-28 16:58:16,529 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2019-11-28 16:58:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:58:18,607 INFO L93 Difference]: Finished difference Result 187 states and 217 transitions. [2019-11-28 16:58:18,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2019-11-28 16:58:18,611 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2019-11-28 16:58:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:58:18,613 INFO L225 Difference]: With dead ends: 187 [2019-11-28 16:58:18,613 INFO L226 Difference]: Without dead ends: 182 [2019-11-28 16:58:18,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=3438, Invalid=16868, Unknown=0, NotChecked=0, Total=20306 [2019-11-28 16:58:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-28 16:58:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 45. [2019-11-28 16:58:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-28 16:58:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-11-28 16:58:18,635 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2019-11-28 16:58:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:58:18,636 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-11-28 16:58:18,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-28 16:58:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-11-28 16:58:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-28 16:58:18,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:58:18,637 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:58:18,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2019-11-28 16:58:18,845 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:58:18,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:58:18,846 INFO L82 PathProgramCache]: Analyzing trace with hash 958970451, now seen corresponding path program 3 times [2019-11-28 16:58:18,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-28 16:58:18,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534084603] [2019-11-28 16:58:18,847 INFO L92 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 [2019-11-28 16:58:19,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-28 16:58:19,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-28 16:58:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:58:19,207 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-28 16:58:19,207 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:58:19,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2019-11-28 16:58:19,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:58:19 BoogieIcfgContainer [2019-11-28 16:58:19,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:58:19,472 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:58:19,472 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:58:19,472 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:58:19,473 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:57:42" (3/4) ... [2019-11-28 16:58:19,476 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 16:58:19,555 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:58:19,555 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:58:19,557 INFO L168 Benchmark]: Toolchain (without parser) took 37769.78 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 319.3 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -90.7 MB). Peak memory consumption was 228.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:19,558 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:58:19,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 456.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -160.4 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:19,559 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.95 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:58:19,559 INFO L168 Benchmark]: Boogie Preprocessor took 57.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:58:19,560 INFO L168 Benchmark]: RCFGBuilder took 345.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:19,563 INFO L168 Benchmark]: TraceAbstraction took 36768.66 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 181.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.2 MB). Peak memory consumption was 215.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:58:19,564 INFO L168 Benchmark]: Witness Printer took 83.32 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:58:19,568 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 456.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 960.4 MB in the beginning and 1.1 GB in the end (delta: -160.4 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 51.95 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 57.89 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 345.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 36768.66 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 181.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 34.2 MB). Peak memory consumption was 215.6 MB. Max. memory is 11.5 GB. * Witness Printer took 83.32 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] struct dummy d1, d2; VAL [d1={2:0}, d2={3:0}] [L14] d1.a = __VERIFIER_nondet_int() [L15] d1.b = __VERIFIER_nondet_int() [L17] d2.a = __VERIFIER_nondet_int() [L18] d2.b = __VERIFIER_nondet_int() [L23] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={2:0}, d2={3:0}] [L23] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L34] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L23] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={2:0}, d2={3:0}] [L23] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L34] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L35] int i = __VERIFIER_nondet_int(); [L36] COND TRUE pd1 != 0 && pd1 == pd2 && i >= 0 && i < 10 [L37] pd2->array[i] = i [L38] int *pa = &pd1->array[i]; [L39] EXPR pd2->array[i] [L39] i = pd2->array[i] - 10 [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={2:0}, d2={3:0}] [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={2:0}, d2={3:0}] [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={2:0}, d2={3:0}] [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={2:0}, d2={3:0}] [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={2:0}, d2={3:0}] [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={2:0}, d2={3:0}] [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={2:0}, d2={3:0}] [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={2:0}, d2={3:0}] [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={2:0}, d2={3:0}] [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={2:0}, d2={3:0}] [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND TRUE i <= *pa [L41] ++i VAL [d1={2:0}, d2={3:0}] [L40] EXPR \read(*pa) VAL [d1={2:0}, d2={3:0}] [L40] COND FALSE !(i <= *pa) [L28] EXPR s1->array[i] [L28] return s1->array[i] == i; [L43] COND TRUE !check(pd2, i) [L50] __VERIFIER_error() VAL [d1={2:0}, d2={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 36.5s, OverallIterations: 5, TraceHistogramMax: 12, AutomataDifference: 31.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 621 SDslu, 253 SDs, 0 SdLazy, 701 SolverSat, 340 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 341 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9190 ImplicationChecksByTransitivity, 30.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred 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, 251 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 26049 SizeOfPredicates, 42 NumberOfNonLiveVariables, 239 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 0/96 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...