./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_o10.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 0c292d0c9d9c055df9398b3303a92d6621b60758 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:29:56,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:29:56,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:29:56,660 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:29:56,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:29:56,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:29:56,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:29:56,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:29:56,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:29:56,673 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:29:56,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:29:56,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:29:56,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:29:56,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:29:56,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:29:56,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:29:56,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:29:56,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:29:56,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:29:56,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:29:56,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:29:56,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:29:56,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:29:56,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:29:56,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:29:56,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:29:56,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:29:56,703 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:29:56,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:29:56,704 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:29:56,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:29:56,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:29:56,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:29:56,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:29:56,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:29:56,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:29:56,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:29:56,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:29:56,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:29:56,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:29:56,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:29:56,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:29:56,729 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:29:56,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:29:56,731 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:29:56,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:29:56,732 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:29:56,732 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:29:56,733 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:29:56,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:29:56,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:29:56,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:29:56,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:29:56,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:29:56,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:29:56,734 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:29:56,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:29:56,735 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:29:56,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:29:56,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:29:56,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:29:56,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:29:56,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:29:56,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:29:56,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:29:56,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:29:56,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:29:56,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:29:56,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:29:56,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:29:56,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:29:56,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c292d0c9d9c055df9398b3303a92d6621b60758 [2019-11-28 17:29:57,053 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:29:57,070 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:29:57,074 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:29:57,076 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:29:57,077 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:29:57,078 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o10.c [2019-11-28 17:29:57,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994926343/f95a16b58e2c4a7687552311c6b8ca61/FLAG1be4ed2d3 [2019-11-28 17:29:57,584 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:29:57,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o10.c [2019-11-28 17:29:57,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994926343/f95a16b58e2c4a7687552311c6b8ca61/FLAG1be4ed2d3 [2019-11-28 17:29:57,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/994926343/f95a16b58e2c4a7687552311c6b8ca61 [2019-11-28 17:29:58,002 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:29:58,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:29:58,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:58,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:29:58,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:29:58,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:58" (1/1) ... [2019-11-28 17:29:58,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff623f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58, skipping insertion in model container [2019-11-28 17:29:58,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:58" (1/1) ... [2019-11-28 17:29:58,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:29:58,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:29:58,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:58,223 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:29:58,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:58,249 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:29:58,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58 WrapperNode [2019-11-28 17:29:58,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:58,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:58,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:29:58,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:29:58,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58" (1/1) ... [2019-11-28 17:29:58,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58" (1/1) ... [2019-11-28 17:29:58,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:58,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:29:58,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:29:58,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:29:58,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58" (1/1) ... [2019-11-28 17:29:58,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58" (1/1) ... [2019-11-28 17:29:58,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58" (1/1) ... [2019-11-28 17:29:58,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58" (1/1) ... [2019-11-28 17:29:58,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58" (1/1) ... [2019-11-28 17:29:58,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58" (1/1) ... [2019-11-28 17:29:58,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58" (1/1) ... [2019-11-28 17:29:58,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:29:58,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:29:58,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:29:58,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:29:58,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:29:58,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:29:58,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:29:58,421 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 17:29:58,422 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 17:29:58,570 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:29:58,571 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:29:58,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:58 BoogieIcfgContainer [2019-11-28 17:29:58,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:29:58,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:29:58,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:29:58,577 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:29:58,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:29:58" (1/3) ... [2019-11-28 17:29:58,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea3858a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:58, skipping insertion in model container [2019-11-28 17:29:58,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:58" (2/3) ... [2019-11-28 17:29:58,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ea3858a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:58, skipping insertion in model container [2019-11-28 17:29:58,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:58" (3/3) ... [2019-11-28 17:29:58,581 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2019-11-28 17:29:58,591 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:29:58,598 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:29:58,610 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:29:58,633 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:29:58,633 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:29:58,633 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:29:58,634 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:29:58,634 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:29:58,634 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:29:58,634 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:29:58,634 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:29:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 17:29:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:29:58,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:58,654 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:58,654 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:58,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:58,659 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 17:29:58,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:58,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861353368] [2019-11-28 17:29:58,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:29:58,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861353368] [2019-11-28 17:29:58,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:58,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:29:58,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664114805] [2019-11-28 17:29:58,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:29:58,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:58,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:29:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:58,983 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-28 17:29:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:59,061 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-28 17:29:59,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:59,064 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:29:59,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:59,080 INFO L225 Difference]: With dead ends: 27 [2019-11-28 17:29:59,081 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 17:29:59,087 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:59,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 17:29:59,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 17:29:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 17:29:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 17:29:59,150 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 17:29:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:59,151 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 17:29:59,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:29:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 17:29:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 17:29:59,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:59,155 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:59,156 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 17:29:59,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:59,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096180331] [2019-11-28 17:29:59,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:29:59,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096180331] [2019-11-28 17:29:59,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292720410] [2019-11-28 17:29:59,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,459 INFO L264 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 17:29:59,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:59,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 17:29:59,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:59,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-28 17:29:59,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480640689] [2019-11-28 17:29:59,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:29:59,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:59,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:29:59,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:29:59,560 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-28 17:29:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:59,615 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 17:29:59,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:29:59,616 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-28 17:29:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:59,617 INFO L225 Difference]: With dead ends: 21 [2019-11-28 17:29:59,617 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:29:59,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:29:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:29:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 17:29:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:29:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 17:29:59,627 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 17:29:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:59,628 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 17:29:59,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:29:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 17:29:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:29:59,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:59,629 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:59,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:59,834 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 17:29:59,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:59,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220094007] [2019-11-28 17:29:59,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 17:30:00,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220094007] [2019-11-28 17:30:00,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462994266] [2019-11-28 17:30:00,088 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:00,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:00,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:00,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 17:30:00,121 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 17:30:00,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:00,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-28 17:30:00,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997597829] [2019-11-28 17:30:00,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:30:00,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:00,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:30:00,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:30:00,225 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-11-28 17:30:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:00,286 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 17:30:00,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:30:00,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-28 17:30:00,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:00,288 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:30:00,288 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 17:30:00,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:30:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 17:30:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 17:30:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 17:30:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 17:30:00,295 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 17:30:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:00,296 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 17:30:00,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:30:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 17:30:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 17:30:00,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:00,297 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:00,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:00,508 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 17:30:00,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:00,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625333866] [2019-11-28 17:30:00,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 17:30:00,861 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625333866] [2019-11-28 17:30:00,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510846628] [2019-11-28 17:30:00,862 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:00,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 17:30:00,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:00,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 17:30:00,909 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 17:30:00,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:00,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-28 17:30:00,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503401733] [2019-11-28 17:30:00,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:30:00,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:00,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:30:00,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:30:00,972 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-11-28 17:30:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:01,045 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-28 17:30:01,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:30:01,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-28 17:30:01,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:01,047 INFO L225 Difference]: With dead ends: 27 [2019-11-28 17:30:01,047 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 17:30:01,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:30:01,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 17:30:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 17:30:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 17:30:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-28 17:30:01,061 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-28 17:30:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:01,062 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-28 17:30:01,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:30:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-28 17:30:01,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 17:30:01,066 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:01,066 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:01,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:01,269 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:01,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:01,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-28 17:30:01,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:01,270 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007667564] [2019-11-28 17:30:01,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 17:30:01,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007667564] [2019-11-28 17:30:01,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798401861] [2019-11-28 17:30:01,580 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:01,620 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:30:01,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:01,621 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 17:30:01,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 17:30:01,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:01,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-28 17:30:01,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132173215] [2019-11-28 17:30:01,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:30:01,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:01,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:30:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:30:01,699 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 14 states. [2019-11-28 17:30:01,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:01,792 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-28 17:30:01,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:30:01,793 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2019-11-28 17:30:01,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:01,794 INFO L225 Difference]: With dead ends: 30 [2019-11-28 17:30:01,794 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 17:30:01,795 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:30:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 17:30:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 17:30:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:30:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 17:30:01,804 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-28 17:30:01,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:01,805 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 17:30:01,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:30:01,805 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 17:30:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 17:30:01,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:01,809 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:02,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:02,014 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:02,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:02,014 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-28 17:30:02,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:02,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70880471] [2019-11-28 17:30:02,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 17:30:02,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70880471] [2019-11-28 17:30:02,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320749506] [2019-11-28 17:30:02,394 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:02,501 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 17:30:02,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:02,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-28 17:30:02,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 17:30:02,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:02,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-28 17:30:02,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20141183] [2019-11-28 17:30:02,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 17:30:02,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:02,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 17:30:02,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:30:02,565 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 16 states. [2019-11-28 17:30:02,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:02,667 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-28 17:30:02,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 17:30:02,668 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2019-11-28 17:30:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:02,669 INFO L225 Difference]: With dead ends: 33 [2019-11-28 17:30:02,670 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 17:30:02,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:30:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 17:30:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 17:30:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 17:30:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-28 17:30:02,677 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-28 17:30:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:02,677 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-28 17:30:02,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 17:30:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-28 17:30:02,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-28 17:30:02,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:02,679 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:02,892 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:02,892 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:02,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:02,893 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-28 17:30:02,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:02,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495246381] [2019-11-28 17:30:02,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 17:30:03,288 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495246381] [2019-11-28 17:30:03,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580763814] [2019-11-28 17:30:03,289 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:03,331 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 17:30:03,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:03,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 17:30:03,335 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 17:30:03,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:03,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-28 17:30:03,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107698541] [2019-11-28 17:30:03,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-28 17:30:03,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:03,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-28 17:30:03,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:30:03,400 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 18 states. [2019-11-28 17:30:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:03,530 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-28 17:30:03,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 17:30:03,530 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2019-11-28 17:30:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:03,532 INFO L225 Difference]: With dead ends: 36 [2019-11-28 17:30:03,532 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 17:30:03,532 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:30:03,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 17:30:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-28 17:30:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 17:30:03,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-28 17:30:03,540 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-28 17:30:03,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:03,541 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-28 17:30:03,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-28 17:30:03,541 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-28 17:30:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-28 17:30:03,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:03,543 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:03,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:03,752 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:03,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:03,753 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-28 17:30:03,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:03,753 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247445066] [2019-11-28 17:30:03,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-28 17:30:04,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247445066] [2019-11-28 17:30:04,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9496821] [2019-11-28 17:30:04,219 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-28 17:30:04,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-28 17:30:04,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:04,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-28 17:30:04,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744606378] [2019-11-28 17:30:04,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-28 17:30:04,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:04,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 17:30:04,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:30:04,339 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 20 states. [2019-11-28 17:30:04,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:04,509 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-28 17:30:04,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 17:30:04,510 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2019-11-28 17:30:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:04,512 INFO L225 Difference]: With dead ends: 39 [2019-11-28 17:30:04,512 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 17:30:04,513 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:30:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 17:30:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-28 17:30:04,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 17:30:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-28 17:30:04,519 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-28 17:30:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:04,520 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-28 17:30:04,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-28 17:30:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-28 17:30:04,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-28 17:30:04,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:04,522 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:04,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:04,729 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:04,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-28 17:30:04,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:04,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250642844] [2019-11-28 17:30:04,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-28 17:30:05,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250642844] [2019-11-28 17:30:05,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295162552] [2019-11-28 17:30:05,268 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:05,307 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:05,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:05,308 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-28 17:30:05,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-28 17:30:05,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:05,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-28 17:30:05,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290891748] [2019-11-28 17:30:05,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-28 17:30:05,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:05,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-28 17:30:05,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2019-11-28 17:30:05,405 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 22 states. [2019-11-28 17:30:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:05,624 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-28 17:30:05,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 17:30:05,624 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 57 [2019-11-28 17:30:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:05,626 INFO L225 Difference]: With dead ends: 42 [2019-11-28 17:30:05,626 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 17:30:05,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2019-11-28 17:30:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 17:30:05,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-28 17:30:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-28 17:30:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-28 17:30:05,633 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-28 17:30:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:05,633 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-28 17:30:05,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-28 17:30:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-28 17:30:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-28 17:30:05,635 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:05,635 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:05,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:05,838 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-28 17:30:05,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:05,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542985164] [2019-11-28 17:30:05,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:05,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-28 17:30:06,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542985164] [2019-11-28 17:30:06,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055555969] [2019-11-28 17:30:06,416 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:06,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 17:30:06,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:06,508 INFO L264 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-28 17:30:06,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-28 17:30:06,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:06,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-28 17:30:06,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99745053] [2019-11-28 17:30:06,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-28 17:30:06,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:06,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-28 17:30:06,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2019-11-28 17:30:06,593 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 24 states. [2019-11-28 17:30:06,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:06,800 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-28 17:30:06,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-28 17:30:06,800 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 63 [2019-11-28 17:30:06,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:06,802 INFO L225 Difference]: With dead ends: 45 [2019-11-28 17:30:06,805 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 17:30:06,807 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2019-11-28 17:30:06,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 17:30:06,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-28 17:30:06,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-28 17:30:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-28 17:30:06,818 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-28 17:30:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:06,818 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-28 17:30:06,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-28 17:30:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-28 17:30:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-28 17:30:06,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:06,821 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:07,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:07,026 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:07,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:07,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-28 17:30:07,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:07,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903617712] [2019-11-28 17:30:07,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:30:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:30:07,119 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 17:30:07,120 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 17:30:07,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:30:07 BoogieIcfgContainer [2019-11-28 17:30:07,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:30:07,180 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:30:07,181 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:30:07,181 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:30:07,181 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:58" (3/4) ... [2019-11-28 17:30:07,184 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 17:30:07,287 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:30:07,288 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:30:07,290 INFO L168 Benchmark]: Toolchain (without parser) took 9286.40 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 276.8 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -131.8 MB). Peak memory consumption was 145.0 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:07,291 INFO L168 Benchmark]: CDTParser took 0.79 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:07,294 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.27 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:07,295 INFO L168 Benchmark]: Boogie Procedure Inliner took 90.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -188.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:07,295 INFO L168 Benchmark]: Boogie Preprocessor took 18.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:07,296 INFO L168 Benchmark]: RCFGBuilder took 212.80 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: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:07,296 INFO L168 Benchmark]: TraceAbstraction took 8606.30 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 138.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.1 MB). Peak memory consumption was 159.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:07,297 INFO L168 Benchmark]: Witness Printer took 107.57 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:07,299 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 245.27 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 946.9 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 90.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.4 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -188.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 212.80 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: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8606.30 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 138.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.1 MB). Peak memory consumption was 159.5 MB. Max. memory is 11.5 GB. * Witness Printer took 107.57 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 8.4s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 203 SDtfs, 3 SDslu, 2341 SDs, 0 SdLazy, 1231 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 592 GetRequests, 454 SyntacticMatches, 9 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 780 NumberOfCodeBlocks, 780 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 692 ConstructedInterpolants, 0 QuantifiedInterpolants, 122872 SizeOfPredicates, 9 NumberOfNonLiveVariables, 738 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...