./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa Calling Ultimate with: 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 /storage/repos/svcomp/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.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 9cd87c15c4637a3ecd407847e5a675763d5fece5 ............................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: 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 /storage/repos/svcomp/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.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 9cd87c15c4637a3ecd407847e5a675763d5fece5 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-2e94e6a [2018-12-30 16:02:48,757 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-30 16:02:48,759 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-30 16:02:48,771 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-30 16:02:48,772 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-30 16:02:48,773 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-30 16:02:48,774 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-30 16:02:48,776 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-30 16:02:48,778 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-30 16:02:48,779 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-30 16:02:48,780 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-30 16:02:48,780 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-30 16:02:48,781 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-30 16:02:48,782 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-30 16:02:48,784 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-30 16:02:48,784 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-30 16:02:48,785 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-30 16:02:48,787 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-30 16:02:48,789 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-30 16:02:48,791 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-30 16:02:48,792 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-30 16:02:48,793 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-30 16:02:48,796 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-30 16:02:48,796 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-30 16:02:48,796 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-30 16:02:48,798 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-30 16:02:48,799 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-30 16:02:48,799 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-30 16:02:48,800 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-30 16:02:48,802 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-30 16:02:48,802 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-30 16:02:48,803 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-30 16:02:48,803 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-30 16:02:48,803 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-30 16:02:48,804 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-30 16:02:48,805 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-30 16:02:48,805 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-30 16:02:48,822 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-30 16:02:48,822 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-30 16:02:48,823 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-30 16:02:48,823 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-30 16:02:48,823 INFO L133 SettingsManager]: * Use SBE=true [2018-12-30 16:02:48,824 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-30 16:02:48,824 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-30 16:02:48,825 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-30 16:02:48,825 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-30 16:02:48,825 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-30 16:02:48,825 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-30 16:02:48,825 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-30 16:02:48,825 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-30 16:02:48,826 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-30 16:02:48,827 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-30 16:02:48,827 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-30 16:02:48,827 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-30 16:02:48,827 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-30 16:02:48,827 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-30 16:02:48,827 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-30 16:02:48,828 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-30 16:02:48,829 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-30 16:02:48,829 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-30 16:02:48,829 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-30 16:02:48,829 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-30 16:02:48,829 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-30 16:02:48,829 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-30 16:02:48,831 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-30 16:02:48,831 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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 -> 9cd87c15c4637a3ecd407847e5a675763d5fece5 [2018-12-30 16:02:48,888 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-30 16:02:48,903 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-30 16:02:48,909 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-30 16:02:48,911 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-30 16:02:48,911 INFO L276 PluginConnector]: CDTParser initialized [2018-12-30 16:02:48,912 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-12-30 16:02:48,976 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb26b7abe/16260114510c4694ad5ebfc648ea2a87/FLAG2cbc0480e [2018-12-30 16:02:49,409 INFO L307 CDTParser]: Found 1 translation units. [2018-12-30 16:02:49,410 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-12-30 16:02:49,417 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb26b7abe/16260114510c4694ad5ebfc648ea2a87/FLAG2cbc0480e [2018-12-30 16:02:49,763 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb26b7abe/16260114510c4694ad5ebfc648ea2a87 [2018-12-30 16:02:49,767 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-30 16:02:49,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-30 16:02:49,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-30 16:02:49,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-30 16:02:49,775 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-30 16:02:49,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.12 04:02:49" (1/1) ... [2018-12-30 16:02:49,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a56145b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:49, skipping insertion in model container [2018-12-30 16:02:49,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.12 04:02:49" (1/1) ... [2018-12-30 16:02:49,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-30 16:02:49,809 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-30 16:02:50,036 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-30 16:02:50,042 INFO L191 MainTranslator]: Completed pre-run [2018-12-30 16:02:50,068 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-30 16:02:50,086 INFO L195 MainTranslator]: Completed translation [2018-12-30 16:02:50,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50 WrapperNode [2018-12-30 16:02:50,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-30 16:02:50,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-30 16:02:50,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-30 16:02:50,088 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-30 16:02:50,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50" (1/1) ... [2018-12-30 16:02:50,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50" (1/1) ... [2018-12-30 16:02:50,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-30 16:02:50,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-30 16:02:50,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-30 16:02:50,131 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-30 16:02:50,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50" (1/1) ... [2018-12-30 16:02:50,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50" (1/1) ... [2018-12-30 16:02:50,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50" (1/1) ... [2018-12-30 16:02:50,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50" (1/1) ... [2018-12-30 16:02:50,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50" (1/1) ... [2018-12-30 16:02:50,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50" (1/1) ... [2018-12-30 16:02:50,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50" (1/1) ... [2018-12-30 16:02:50,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-30 16:02:50,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-30 16:02:50,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-30 16:02:50,165 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-30 16:02:50,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50" (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 [2018-12-30 16:02:50,304 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2018-12-30 16:02:50,304 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2018-12-30 16:02:50,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-30 16:02:50,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-30 16:02:50,526 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-30 16:02:50,527 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-30 16:02:50,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.12 04:02:50 BoogieIcfgContainer [2018-12-30 16:02:50,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-30 16:02:50,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-30 16:02:50,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-30 16:02:50,531 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-30 16:02:50,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.12 04:02:49" (1/3) ... [2018-12-30 16:02:50,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ce47f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.12 04:02:50, skipping insertion in model container [2018-12-30 16:02:50,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:50" (2/3) ... [2018-12-30 16:02:50,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ce47f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.12 04:02:50, skipping insertion in model container [2018-12-30 16:02:50,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.12 04:02:50" (3/3) ... [2018-12-30 16:02:50,535 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03_false-unreach-call_true-termination.c [2018-12-30 16:02:50,544 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-30 16:02:50,551 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-30 16:02:50,569 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-30 16:02:50,602 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-30 16:02:50,602 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-30 16:02:50,603 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-30 16:02:50,603 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-30 16:02:50,603 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-30 16:02:50,603 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-30 16:02:50,603 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-30 16:02:50,603 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-30 16:02:50,603 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-30 16:02:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-12-30 16:02:50,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-30 16:02:50,629 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:02:50,630 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:02:50,632 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:02:50,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:02:50,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2032829855, now seen corresponding path program 1 times [2018-12-30 16:02:50,641 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-30 16:02:50,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-30 16:02:50,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-30 16:02:50,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-30 16:02:50,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-30 16:02:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-30 16:02:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-30 16:02:50,785 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-30 16:02:50,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.12 04:02:50 BoogieIcfgContainer [2018-12-30 16:02:50,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-30 16:02:50,813 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-30 16:02:50,814 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-30 16:02:50,814 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-30 16:02:50,814 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.12 04:02:50" (3/4) ... [2018-12-30 16:02:50,819 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-30 16:02:50,819 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-30 16:02:50,820 INFO L168 Benchmark]: Toolchain (without parser) took 1052.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -164.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-30 16:02:50,822 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-30 16:02:50,823 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.32 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-30 16:02:50,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.58 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-30 16:02:50,825 INFO L168 Benchmark]: Boogie Preprocessor took 33.55 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-30 16:02:50,826 INFO L168 Benchmark]: RCFGBuilder took 362.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -188.0 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2018-12-30 16:02:50,827 INFO L168 Benchmark]: TraceAbstraction took 284.80 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: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. [2018-12-30 16:02:50,828 INFO L168 Benchmark]: Witness Printer took 5.74 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. [2018-12-30 16:02:50,836 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 316.32 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.58 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 33.55 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 362.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.8 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -188.0 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 284.80 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: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 11.5 GB. * Witness Printer took 5.74 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 34]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of shiftLeft at line 31. Possible FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) [L29] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L17] COND TRUE n == 1 [L18] return 1; VAL [\old(n)=1, \result=1, n=1] [L29] RET, EXPR hanoi(n) [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1< 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 -> 9cd87c15c4637a3ecd407847e5a675763d5fece5 [2018-12-30 16:02:53,341 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-30 16:02:53,360 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-30 16:02:53,364 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-30 16:02:53,366 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-30 16:02:53,366 INFO L276 PluginConnector]: CDTParser initialized [2018-12-30 16:02:53,367 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-12-30 16:02:53,431 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aa393d8e/ed37f17f3f844c768a1047f6f040fdca/FLAG87d2099af [2018-12-30 16:02:53,851 INFO L307 CDTParser]: Found 1 translation units. [2018-12-30 16:02:53,851 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/bitvector-regression/recHanoi03_false-unreach-call_true-termination.c [2018-12-30 16:02:53,861 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aa393d8e/ed37f17f3f844c768a1047f6f040fdca/FLAG87d2099af [2018-12-30 16:02:54,228 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aa393d8e/ed37f17f3f844c768a1047f6f040fdca [2018-12-30 16:02:54,233 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-30 16:02:54,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-30 16:02:54,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-30 16:02:54,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-30 16:02:54,241 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-30 16:02:54,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.12 04:02:54" (1/1) ... [2018-12-30 16:02:54,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579d3eb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54, skipping insertion in model container [2018-12-30 16:02:54,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.12 04:02:54" (1/1) ... [2018-12-30 16:02:54,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-30 16:02:54,274 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-30 16:02:54,493 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-30 16:02:54,500 INFO L191 MainTranslator]: Completed pre-run [2018-12-30 16:02:54,526 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-30 16:02:54,544 INFO L195 MainTranslator]: Completed translation [2018-12-30 16:02:54,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54 WrapperNode [2018-12-30 16:02:54,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-30 16:02:54,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-30 16:02:54,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-30 16:02:54,546 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-30 16:02:54,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54" (1/1) ... [2018-12-30 16:02:54,565 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54" (1/1) ... [2018-12-30 16:02:54,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-30 16:02:54,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-30 16:02:54,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-30 16:02:54,590 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-30 16:02:54,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54" (1/1) ... [2018-12-30 16:02:54,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54" (1/1) ... [2018-12-30 16:02:54,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54" (1/1) ... [2018-12-30 16:02:54,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54" (1/1) ... [2018-12-30 16:02:54,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54" (1/1) ... [2018-12-30 16:02:54,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54" (1/1) ... [2018-12-30 16:02:54,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54" (1/1) ... [2018-12-30 16:02:54,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-30 16:02:54,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-30 16:02:54,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-30 16:02:54,615 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-30 16:02:54,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54" (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 [2018-12-30 16:02:54,738 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2018-12-30 16:02:54,739 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2018-12-30 16:02:54,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-30 16:02:54,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-30 16:02:54,951 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-30 16:02:54,951 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-30 16:02:54,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.12 04:02:54 BoogieIcfgContainer [2018-12-30 16:02:54,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-30 16:02:54,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-30 16:02:54,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-30 16:02:54,957 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-30 16:02:54,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.12 04:02:54" (1/3) ... [2018-12-30 16:02:54,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147d070e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.12 04:02:54, skipping insertion in model container [2018-12-30 16:02:54,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.12 04:02:54" (2/3) ... [2018-12-30 16:02:54,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147d070e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.12 04:02:54, skipping insertion in model container [2018-12-30 16:02:54,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.12 04:02:54" (3/3) ... [2018-12-30 16:02:54,962 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03_false-unreach-call_true-termination.c [2018-12-30 16:02:54,984 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-30 16:02:55,002 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-30 16:02:55,040 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-30 16:02:55,117 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-30 16:02:55,118 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-30 16:02:55,118 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-30 16:02:55,118 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-30 16:02:55,118 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-30 16:02:55,118 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-30 16:02:55,119 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-30 16:02:55,119 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-30 16:02:55,119 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-30 16:02:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-12-30 16:02:55,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-30 16:02:55,148 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:02:55,149 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:02:55,151 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:02:55,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:02:55,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2032829855, now seen corresponding path program 1 times [2018-12-30 16:02:55,163 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:02:55,163 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:02:55,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-30 16:02:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-30 16:02:55,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:02:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-30 16:02:55,467 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [MP cvc4 --incremental --print-success --lang smt --rewrite-divk (2)] Exception during sending of exit command (exit): Broken pipe [2018-12-30 16:02:55,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-30 16:02:55,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-12-30 16:02:55,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-30 16:02:55,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-30 16:02:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-12-30 16:02:55,490 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 7 states. [2018-12-30 16:02:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:02:55,901 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-12-30 16:02:55,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-30 16:02:55,904 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-12-30 16:02:55,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:02:55,916 INFO L225 Difference]: With dead ends: 31 [2018-12-30 16:02:55,916 INFO L226 Difference]: Without dead ends: 15 [2018-12-30 16:02:55,920 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-30 16:02:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-30 16:02:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-30 16:02:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-30 16:02:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-12-30 16:02:55,968 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-12-30 16:02:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:02:55,969 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-12-30 16:02:55,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-30 16:02:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-12-30 16:02:55,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-30 16:02:55,971 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:02:55,972 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:02:55,972 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:02:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:02:55,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1521841779, now seen corresponding path program 1 times [2018-12-30 16:02:55,973 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:02:55,973 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:02:56,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-30 16:02:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-30 16:02:56,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:02:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-30 16:02:56,212 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:02:56,663 WARN L181 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-12-30 16:02:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-30 16:02:57,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:02:57,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-12-30 16:02:57,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-30 16:02:57,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-30 16:02:57,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-12-30 16:02:57,653 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 16 states. [2018-12-30 16:02:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:02:58,315 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-12-30 16:02:58,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-30 16:02:58,316 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-12-30 16:02:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:02:58,317 INFO L225 Difference]: With dead ends: 27 [2018-12-30 16:02:58,317 INFO L226 Difference]: Without dead ends: 21 [2018-12-30 16:02:58,318 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2018-12-30 16:02:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-30 16:02:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-12-30 16:02:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-30 16:02:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-30 16:02:58,325 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2018-12-30 16:02:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:02:58,326 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-30 16:02:58,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-30 16:02:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-12-30 16:02:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-12-30 16:02:58,327 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:02:58,327 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:02:58,328 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:02:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:02:58,328 INFO L82 PathProgramCache]: Analyzing trace with hash -88960435, now seen corresponding path program 2 times [2018-12-30 16:02:58,328 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:02:58,329 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:02:58,351 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-30 16:02:58,384 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-30 16:02:58,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:02:58,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:02:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-30 16:02:58,759 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:03:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-12-30 16:03:00,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:03:00,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2018-12-30 16:03:00,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-30 16:03:00,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-30 16:03:00,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2018-12-30 16:03:00,372 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 26 states. [2018-12-30 16:03:01,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:03:01,167 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2018-12-30 16:03:01,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-30 16:03:01,169 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2018-12-30 16:03:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:03:01,172 INFO L225 Difference]: With dead ends: 33 [2018-12-30 16:03:01,173 INFO L226 Difference]: Without dead ends: 27 [2018-12-30 16:03:01,174 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2018-12-30 16:03:01,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-12-30 16:03:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-12-30 16:03:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-12-30 16:03:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-12-30 16:03:01,181 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 28 [2018-12-30 16:03:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:03:01,181 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-30 16:03:01,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-30 16:03:01,181 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-12-30 16:03:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-12-30 16:03:01,183 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:03:01,183 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:03:01,183 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:03:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:03:01,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1444383501, now seen corresponding path program 3 times [2018-12-30 16:03:01,184 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:03:01,184 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:03:01,213 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-30 16:03:01,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-30 16:03:01,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:03:01,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:03:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-30 16:03:01,581 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:03:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [MP cvc4 --incremental --print-success --lang smt --rewrite-divk (5)] Exception during sending of exit command (exit): Broken pipe [2018-12-30 16:03:04,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:03:04,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2018-12-30 16:03:04,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-12-30 16:03:04,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-12-30 16:03:04,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2018-12-30 16:03:04,422 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 36 states. [2018-12-30 16:03:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:03:05,868 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-12-30 16:03:05,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-30 16:03:05,869 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2018-12-30 16:03:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:03:05,873 INFO L225 Difference]: With dead ends: 39 [2018-12-30 16:03:05,873 INFO L226 Difference]: Without dead ends: 33 [2018-12-30 16:03:05,875 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2018-12-30 16:03:05,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-12-30 16:03:05,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-12-30 16:03:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-12-30 16:03:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-12-30 16:03:05,882 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 40 [2018-12-30 16:03:05,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:03:05,883 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-12-30 16:03:05,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-12-30 16:03:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-12-30 16:03:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-12-30 16:03:05,885 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:03:05,885 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:03:05,885 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:03:05,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:03:05,886 INFO L82 PathProgramCache]: Analyzing trace with hash 608531405, now seen corresponding path program 4 times [2018-12-30 16:03:05,886 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:03:05,887 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:03:05,922 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-30 16:03:05,972 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-30 16:03:05,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:03:05,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:03:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-30 16:03:06,610 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:03:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-12-30 16:03:10,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:03:10,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2018-12-30 16:03:10,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-12-30 16:03:10,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-12-30 16:03:10,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2018-12-30 16:03:10,516 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 46 states. [2018-12-30 16:03:12,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:03:12,603 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2018-12-30 16:03:12,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-30 16:03:12,604 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 52 [2018-12-30 16:03:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:03:12,607 INFO L225 Difference]: With dead ends: 45 [2018-12-30 16:03:12,607 INFO L226 Difference]: Without dead ends: 39 [2018-12-30 16:03:12,609 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2018-12-30 16:03:12,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-12-30 16:03:12,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-12-30 16:03:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-30 16:03:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-12-30 16:03:12,616 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 52 [2018-12-30 16:03:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:03:12,617 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-12-30 16:03:12,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-12-30 16:03:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-12-30 16:03:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-12-30 16:03:12,619 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:03:12,619 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:03:12,619 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:03:12,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:03:12,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1459073907, now seen corresponding path program 5 times [2018-12-30 16:03:12,620 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:03:12,620 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:03:12,638 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-12-30 16:03:12,708 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-12-30 16:03:12,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:03:12,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:03:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-30 16:03:13,205 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:03:15,135 WARN L181 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-12-30 16:03:15,274 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-12-30 16:03:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-12-30 16:03:19,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:03:19,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2018-12-30 16:03:19,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-12-30 16:03:19,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-12-30 16:03:19,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2018-12-30 16:03:19,275 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 56 states. [2018-12-30 16:03:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:03:21,783 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-12-30 16:03:21,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-30 16:03:21,784 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 64 [2018-12-30 16:03:21,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:03:21,787 INFO L225 Difference]: With dead ends: 51 [2018-12-30 16:03:21,787 INFO L226 Difference]: Without dead ends: 45 [2018-12-30 16:03:21,789 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2018-12-30 16:03:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-12-30 16:03:21,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-12-30 16:03:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-30 16:03:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-12-30 16:03:21,796 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 64 [2018-12-30 16:03:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:03:21,797 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-12-30 16:03:21,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-12-30 16:03:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-12-30 16:03:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-12-30 16:03:21,800 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:03:21,800 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:03:21,800 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:03:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:03:21,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1087630003, now seen corresponding path program 6 times [2018-12-30 16:03:21,801 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:03:21,801 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:03:21,818 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-12-30 16:03:21,905 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-12-30 16:03:21,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:03:21,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:03:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-30 16:03:22,541 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:03:24,076 WARN L181 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-12-30 16:03:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-12-30 16:03:31,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:03:31,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2018-12-30 16:03:31,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-12-30 16:03:31,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-12-30 16:03:31,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2018-12-30 16:03:31,253 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 66 states. [2018-12-30 16:03:35,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:03:35,186 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2018-12-30 16:03:35,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-30 16:03:35,187 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 76 [2018-12-30 16:03:35,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:03:35,190 INFO L225 Difference]: With dead ends: 57 [2018-12-30 16:03:35,190 INFO L226 Difference]: Without dead ends: 51 [2018-12-30 16:03:35,193 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2018-12-30 16:03:35,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-12-30 16:03:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-12-30 16:03:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-12-30 16:03:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-12-30 16:03:35,200 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 76 [2018-12-30 16:03:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:03:35,200 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-12-30 16:03:35,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-12-30 16:03:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-12-30 16:03:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-12-30 16:03:35,202 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:03:35,202 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:03:35,203 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:03:35,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:03:35,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1736651251, now seen corresponding path program 7 times [2018-12-30 16:03:35,203 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:03:35,203 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:03:35,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-30 16:03:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-30 16:03:35,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:03:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-30 16:03:36,094 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:03:42,613 WARN L181 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-12-30 16:03:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2018-12-30 16:03:46,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:03:46,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2018-12-30 16:03:46,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-12-30 16:03:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-12-30 16:03:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2018-12-30 16:03:46,530 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 76 states. [2018-12-30 16:03:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:03:50,305 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2018-12-30 16:03:50,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-12-30 16:03:50,307 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 88 [2018-12-30 16:03:50,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:03:50,309 INFO L225 Difference]: With dead ends: 63 [2018-12-30 16:03:50,309 INFO L226 Difference]: Without dead ends: 57 [2018-12-30 16:03:50,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2018-12-30 16:03:50,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-12-30 16:03:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-12-30 16:03:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-12-30 16:03:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-12-30 16:03:50,321 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 88 [2018-12-30 16:03:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:03:50,322 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-12-30 16:03:50,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-12-30 16:03:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-12-30 16:03:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-12-30 16:03:50,326 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:03:50,326 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:03:50,326 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:03:50,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:03:50,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2110158541, now seen corresponding path program 8 times [2018-12-30 16:03:50,327 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:03:50,327 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:03:50,344 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-30 16:03:50,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-30 16:03:50,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:03:50,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:03:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-12-30 16:03:51,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:04:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-12-30 16:04:03,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:04:03,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2018-12-30 16:04:03,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-12-30 16:04:03,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-12-30 16:04:03,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2018-12-30 16:04:03,891 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 86 states. [2018-12-30 16:04:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:04:08,886 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-12-30 16:04:08,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-12-30 16:04:08,888 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 100 [2018-12-30 16:04:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:04:08,891 INFO L225 Difference]: With dead ends: 69 [2018-12-30 16:04:08,891 INFO L226 Difference]: Without dead ends: 63 [2018-12-30 16:04:08,895 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1070, Invalid=13450, Unknown=0, NotChecked=0, Total=14520 [2018-12-30 16:04:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-12-30 16:04:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-12-30 16:04:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-30 16:04:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-12-30 16:04:08,903 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 100 [2018-12-30 16:04:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:04:08,904 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-12-30 16:04:08,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-12-30 16:04:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-12-30 16:04:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-12-30 16:04:08,905 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:04:08,907 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:04:08,907 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:04:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:04:08,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1898639475, now seen corresponding path program 9 times [2018-12-30 16:04:08,908 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:04:08,908 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:04:08,926 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-30 16:04:09,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-12-30 16:04:09,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:04:09,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:04:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-12-30 16:04:10,171 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:04:11,721 WARN L181 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-12-30 16:04:11,856 WARN L181 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-12-30 16:04:12,025 WARN L181 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-12-30 16:04:17,209 WARN L181 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-12-30 16:04:17,310 WARN L181 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-12-30 16:04:19,885 WARN L181 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-12-30 16:04:20,029 WARN L181 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-12-30 16:04:20,203 WARN L181 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-12-30 16:04:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-12-30 16:04:27,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:04:27,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2018-12-30 16:04:27,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-12-30 16:04:27,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-12-30 16:04:27,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2018-12-30 16:04:27,211 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 96 states. [2018-12-30 16:04:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:04:32,507 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2018-12-30 16:04:32,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-30 16:04:32,508 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 112 [2018-12-30 16:04:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:04:32,511 INFO L225 Difference]: With dead ends: 75 [2018-12-30 16:04:32,511 INFO L226 Difference]: Without dead ends: 69 [2018-12-30 16:04:32,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1274, Invalid=16816, Unknown=0, NotChecked=0, Total=18090 [2018-12-30 16:04:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-12-30 16:04:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-12-30 16:04:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-12-30 16:04:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-12-30 16:04:32,523 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 112 [2018-12-30 16:04:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:04:32,524 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-12-30 16:04:32,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-12-30 16:04:32,524 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-12-30 16:04:32,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-12-30 16:04:32,527 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:04:32,527 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:04:32,528 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:04:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:04:32,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2106288051, now seen corresponding path program 10 times [2018-12-30 16:04:32,528 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:04:32,528 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:04:32,545 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-30 16:04:32,671 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-30 16:04:32,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:04:32,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:04:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-12-30 16:04:34,055 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:04:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2018-12-30 16:04:53,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:04:53,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63] total 106 [2018-12-30 16:04:53,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-12-30 16:04:53,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-12-30 16:04:53,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2018-12-30 16:04:53,519 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 106 states. [2018-12-30 16:05:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:05:00,586 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-12-30 16:05:00,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-12-30 16:05:00,588 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 124 [2018-12-30 16:05:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:05:00,590 INFO L225 Difference]: With dead ends: 81 [2018-12-30 16:05:00,590 INFO L226 Difference]: Without dead ends: 75 [2018-12-30 16:05:00,592 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1494, Invalid=20558, Unknown=0, NotChecked=0, Total=22052 [2018-12-30 16:05:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-12-30 16:05:00,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-12-30 16:05:00,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-12-30 16:05:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-12-30 16:05:00,600 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 124 [2018-12-30 16:05:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:05:00,601 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-12-30 16:05:00,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-12-30 16:05:00,601 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-12-30 16:05:00,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-12-30 16:05:00,604 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:05:00,605 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:05:00,605 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:05:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:05:00,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1718685965, now seen corresponding path program 11 times [2018-12-30 16:05:00,606 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:05:00,606 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:05:00,623 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-12-30 16:05:00,807 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-12-30 16:05:00,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:05:00,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:05:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-12-30 16:05:02,655 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:05:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2018-12-30 16:05:25,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:05:25,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69] total 116 [2018-12-30 16:05:25,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-12-30 16:05:25,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-12-30 16:05:25,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2018-12-30 16:05:25,309 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 116 states. [2018-12-30 16:05:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:05:32,530 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2018-12-30 16:05:32,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-12-30 16:05:32,531 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 136 [2018-12-30 16:05:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:05:32,533 INFO L225 Difference]: With dead ends: 87 [2018-12-30 16:05:32,533 INFO L226 Difference]: Without dead ends: 81 [2018-12-30 16:05:32,535 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 153 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2018-12-30 16:05:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-12-30 16:05:32,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-12-30 16:05:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-12-30 16:05:32,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-12-30 16:05:32,550 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 136 [2018-12-30 16:05:32,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:05:32,550 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-12-30 16:05:32,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-12-30 16:05:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-12-30 16:05:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-12-30 16:05:32,552 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:05:32,552 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:05:32,552 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:05:32,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:05:32,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1603697101, now seen corresponding path program 12 times [2018-12-30 16:05:32,553 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:05:32,553 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:05:32,571 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-12-30 16:05:32,735 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-12-30 16:05:32,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:05:32,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:05:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-12-30 16:05:34,538 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:06:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2018-12-30 16:06:01,337 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:06:01,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75] total 126 [2018-12-30 16:06:01,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-12-30 16:06:01,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-12-30 16:06:01,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=15289, Unknown=0, NotChecked=0, Total=15750 [2018-12-30 16:06:01,340 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 126 states. [2018-12-30 16:06:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:06:10,350 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2018-12-30 16:06:10,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-12-30 16:06:10,351 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 148 [2018-12-30 16:06:10,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:06:10,353 INFO L225 Difference]: With dead ends: 93 [2018-12-30 16:06:10,353 INFO L226 Difference]: Without dead ends: 87 [2018-12-30 16:06:10,356 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4102 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=1982, Invalid=29170, Unknown=0, NotChecked=0, Total=31152 [2018-12-30 16:06:10,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-12-30 16:06:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-12-30 16:06:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-12-30 16:06:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-12-30 16:06:10,362 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 148 [2018-12-30 16:06:10,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:06:10,363 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-12-30 16:06:10,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-12-30 16:06:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-12-30 16:06:10,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-12-30 16:06:10,367 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:06:10,367 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:06:10,367 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:06:10,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:06:10,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1773195917, now seen corresponding path program 13 times [2018-12-30 16:06:10,368 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:06:10,368 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:06:10,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-30 16:06:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-30 16:06:10,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:06:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2018-12-30 16:06:12,583 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:06:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 1575 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-12-30 16:06:43,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:06:43,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 81] total 136 [2018-12-30 16:06:43,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-12-30 16:06:43,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-12-30 16:06:43,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=17861, Unknown=0, NotChecked=0, Total=18360 [2018-12-30 16:06:43,852 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 136 states. [2018-12-30 16:06:53,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:06:53,378 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2018-12-30 16:06:53,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-12-30 16:06:53,380 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 160 [2018-12-30 16:06:53,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:06:53,384 INFO L225 Difference]: With dead ends: 99 [2018-12-30 16:06:53,384 INFO L226 Difference]: Without dead ends: 93 [2018-12-30 16:06:53,386 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4781 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=2250, Invalid=34040, Unknown=0, NotChecked=0, Total=36290 [2018-12-30 16:06:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-30 16:06:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-12-30 16:06:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-12-30 16:06:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-12-30 16:06:53,395 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 160 [2018-12-30 16:06:53,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:06:53,399 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-12-30 16:06:53,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-12-30 16:06:53,399 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-12-30 16:06:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-12-30 16:06:53,401 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:06:53,401 INFO L402 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:06:53,401 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:06:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:06:53,401 INFO L82 PathProgramCache]: Analyzing trace with hash 395057997, now seen corresponding path program 14 times [2018-12-30 16:06:53,404 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:06:53,404 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:06:53,420 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-30 16:06:53,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-30 16:06:53,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:06:53,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:06:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2018-12-30 16:06:56,306 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:07:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1836 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2018-12-30 16:07:32,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:07:32,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 87] total 146 [2018-12-30 16:07:32,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-12-30 16:07:32,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-12-30 16:07:32,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=20633, Unknown=0, NotChecked=0, Total=21170 [2018-12-30 16:07:32,945 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 146 states. [2018-12-30 16:07:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:07:44,098 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2018-12-30 16:07:44,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-12-30 16:07:44,100 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 172 [2018-12-30 16:07:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:07:44,102 INFO L225 Difference]: With dead ends: 105 [2018-12-30 16:07:44,102 INFO L226 Difference]: Without dead ends: 99 [2018-12-30 16:07:44,104 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5512 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=2534, Invalid=39286, Unknown=0, NotChecked=0, Total=41820 [2018-12-30 16:07:44,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-12-30 16:07:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-12-30 16:07:44,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-12-30 16:07:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-12-30 16:07:44,116 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 172 [2018-12-30 16:07:44,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:07:44,117 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-12-30 16:07:44,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-12-30 16:07:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-12-30 16:07:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-12-30 16:07:44,118 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:07:44,118 INFO L402 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:07:44,118 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:07:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:07:44,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1391744013, now seen corresponding path program 15 times [2018-12-30 16:07:44,119 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:07:44,119 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:07:44,148 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-30 16:07:44,386 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-12-30 16:07:44,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-30 16:07:44,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-30 16:07:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2018-12-30 16:07:47,226 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-30 16:07:59,039 WARN L181 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2018-12-30 16:07:59,257 WARN L181 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-12-30 16:08:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2018-12-30 16:08:29,298 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-30 16:08:29,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 93] total 156 [2018-12-30 16:08:29,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-12-30 16:08:29,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-12-30 16:08:29,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=23605, Unknown=0, NotChecked=0, Total=24180 [2018-12-30 16:08:29,301 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 156 states. [2018-12-30 16:08:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-30 16:08:42,032 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-12-30 16:08:42,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-12-30 16:08:42,034 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 184 [2018-12-30 16:08:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-30 16:08:42,036 INFO L225 Difference]: With dead ends: 111 [2018-12-30 16:08:42,036 INFO L226 Difference]: Without dead ends: 105 [2018-12-30 16:08:42,039 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 209 SyntacticMatches, 3 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6295 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=2834, Invalid=44908, Unknown=0, NotChecked=0, Total=47742 [2018-12-30 16:08:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-12-30 16:08:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-12-30 16:08:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-12-30 16:08:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-12-30 16:08:42,045 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 184 [2018-12-30 16:08:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-30 16:08:42,047 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-12-30 16:08:42,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-12-30 16:08:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-12-30 16:08:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-12-30 16:08:42,048 INFO L394 BasicCegarLoop]: Found error trace [2018-12-30 16:08:42,048 INFO L402 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-30 16:08:42,050 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-30 16:08:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-30 16:08:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash 481656013, now seen corresponding path program 16 times [2018-12-30 16:08:42,051 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-30 16:08:42,051 INFO L69 tionRefinementEngine]: Using refinement strategy WolfRefinementStrategy No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-30 16:08:42,079 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-30 16:08:42,324 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-30 16:08:42,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-12-30 16:08:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-30 16:08:42,678 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-30 16:08:42,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.12 04:08:42 BoogieIcfgContainer [2018-12-30 16:08:42,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-30 16:08:42,779 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-30 16:08:42,779 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-30 16:08:42,779 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-30 16:08:42,779 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.12 04:02:54" (3/4) ... [2018-12-30 16:08:42,784 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-30 16:08:42,899 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-30 16:08:42,903 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-30 16:08:42,904 INFO L168 Benchmark]: Toolchain (without parser) took 348670.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 951.4 MB in the beginning and 887.5 MB in the end (delta: 63.8 MB). Peak memory consumption was 229.5 MB. Max. memory is 11.5 GB. [2018-12-30 16:08:42,904 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-30 16:08:42,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.48 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-30 16:08:42,905 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.20 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-30 16:08:42,905 INFO L168 Benchmark]: Boogie Preprocessor took 24.85 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-30 16:08:42,906 INFO L168 Benchmark]: RCFGBuilder took 337.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -148.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2018-12-30 16:08:42,907 INFO L168 Benchmark]: TraceAbstraction took 347825.18 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 45.6 MB). Free memory was 1.1 GB in the beginning and 887.5 MB in the end (delta: 201.6 MB). Peak memory consumption was 247.2 MB. Max. memory is 11.5 GB. [2018-12-30 16:08:42,908 INFO L168 Benchmark]: Witness Printer took 124.13 ms. Allocated memory is still 1.2 GB. Free memory was 887.5 MB in the beginning and 887.5 MB in the end (delta: 4.0 kB). Peak memory consumption was 4.0 kB. Max. memory is 11.5 GB. [2018-12-30 16:08:42,912 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 309.48 ms. Allocated memory is still 1.0 GB. Free memory was 951.4 MB in the beginning and 940.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.20 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.85 ms. Allocated memory is still 1.0 GB. Free memory is still 940.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 337.38 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.1 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -148.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 347825.18 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 45.6 MB). Free memory was 1.1 GB in the beginning and 887.5 MB in the end (delta: 201.6 MB). Peak memory consumption was 247.2 MB. Max. memory is 11.5 GB. * Witness Printer took 124.13 ms. Allocated memory is still 1.2 GB. Free memory was 887.5 MB in the beginning and 887.5 MB in the end (delta: 4.0 kB). Peak memory consumption was 4.0 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 34]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int n = __VERIFIER_nondet_int(); [L26] COND FALSE !(n < 1) [L29] CALL, EXPR hanoi(n) VAL [\old(n)=32] [L17] COND FALSE !(n == 1) VAL [\old(n)=32, n=32] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=31] [L17] COND FALSE !(n == 1) VAL [\old(n)=31, n=31] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=30] [L17] COND FALSE !(n == 1) VAL [\old(n)=30, n=30] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=29] [L17] COND FALSE !(n == 1) VAL [\old(n)=29, n=29] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=28] [L17] COND FALSE !(n == 1) VAL [\old(n)=28, n=28] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=27] [L17] COND FALSE !(n == 1) VAL [\old(n)=27, n=27] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=26] [L17] COND FALSE !(n == 1) VAL [\old(n)=26, n=26] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=25] [L17] COND FALSE !(n == 1) VAL [\old(n)=25, n=25] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=24] [L17] COND FALSE !(n == 1) VAL [\old(n)=24, n=24] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=23] [L17] COND FALSE !(n == 1) VAL [\old(n)=23, n=23] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=22] [L17] COND FALSE !(n == 1) VAL [\old(n)=22, n=22] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=21] [L17] COND FALSE !(n == 1) VAL [\old(n)=21, n=21] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=20] [L17] COND FALSE !(n == 1) VAL [\old(n)=20, n=20] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=19] [L17] COND FALSE !(n == 1) VAL [\old(n)=19, n=19] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=18] [L17] COND FALSE !(n == 1) VAL [\old(n)=18, n=18] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=17] [L17] COND FALSE !(n == 1) VAL [\old(n)=17, n=17] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=16] [L17] COND FALSE !(n == 1) VAL [\old(n)=16, n=16] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=15] [L17] COND FALSE !(n == 1) VAL [\old(n)=15, n=15] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=14] [L17] COND FALSE !(n == 1) VAL [\old(n)=14, n=14] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=13] [L17] COND FALSE !(n == 1) VAL [\old(n)=13, n=13] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=12] [L17] COND FALSE !(n == 1) VAL [\old(n)=12, n=12] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=11] [L17] COND FALSE !(n == 1) VAL [\old(n)=11, n=11] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=10] [L17] COND FALSE !(n == 1) VAL [\old(n)=10, n=10] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=9] [L17] COND FALSE !(n == 1) VAL [\old(n)=9, n=9] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=8] [L17] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=7] [L17] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=6] [L17] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=5] [L17] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L20] CALL, EXPR hanoi(n-1) VAL [\old(n)=1] [L17] COND TRUE n == 1 [L18] return 1; VAL [\old(n)=1, \result=1, n=1] [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=2, hanoi(n-1)=1, n=2] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=3, hanoi(n-1)=3, n=3] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=4, hanoi(n-1)=7, n=4] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=5, hanoi(n-1)=15, n=5] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=6, hanoi(n-1)=31, n=6] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=7, hanoi(n-1)=63, n=7] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=8, hanoi(n-1)=127, n=8] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=9, hanoi(n-1)=255, n=9] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=10, hanoi(n-1)=511, n=10] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=11, hanoi(n-1)=1023, n=11] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=12, hanoi(n-1)=2047, n=12] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=13, hanoi(n-1)=4095, n=13] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=14, hanoi(n-1)=8191, n=14] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=15, hanoi(n-1)=16383, n=15] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=16, hanoi(n-1)=32767, n=16] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=17, hanoi(n-1)=65535, n=17] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=18, hanoi(n-1)=131071, n=18] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=19, hanoi(n-1)=262143, n=19] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=20, hanoi(n-1)=524287, n=20] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=21, hanoi(n-1)=1048575, n=21] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=22, hanoi(n-1)=2097151, n=22] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=23, hanoi(n-1)=4194303, n=23] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=24, hanoi(n-1)=8388607, n=24] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=25, hanoi(n-1)=16777215, n=25] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=26, hanoi(n-1)=33554431, n=26] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=27, hanoi(n-1)=67108863, n=27] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=28, hanoi(n-1)=134217727, n=28] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=29, hanoi(n-1)=268435455, n=29] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=30, hanoi(n-1)=536870911, n=30] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=31, hanoi(n-1)=1073741823, n=31] [L20] return 2 * (hanoi(n-1)) + 1; [L20] RET, EXPR hanoi(n-1) VAL [\old(n)=32, hanoi(n-1)=2147483647, n=32] [L20] return 2 * (hanoi(n-1)) + 1; [L29] RET, EXPR hanoi(n) [L29] unsigned result = hanoi(n); [L31] COND FALSE !(result+1>0 && result+1 == 1<