./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab 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_i10_o10-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0aae719d835771c4602eac7b24cfefa200f147c0 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-30f4e4a [2019-11-28 00:25:42,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 00:25:42,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 00:25:42,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 00:25:42,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 00:25:42,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 00:25:42,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 00:25:42,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 00:25:42,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 00:25:42,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 00:25:42,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 00:25:42,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 00:25:42,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 00:25:42,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 00:25:42,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 00:25:42,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 00:25:42,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 00:25:42,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 00:25:42,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 00:25:42,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 00:25:42,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 00:25:42,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 00:25:42,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 00:25:42,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 00:25:42,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 00:25:42,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 00:25:42,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 00:25:42,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 00:25:42,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 00:25:42,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 00:25:42,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 00:25:42,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 00:25:42,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 00:25:42,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 00:25:42,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 00:25:42,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 00:25:42,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 00:25:42,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 00:25:42,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 00:25:42,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 00:25:42,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 00:25:42,599 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 00:25:42,614 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 00:25:42,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 00:25:42,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 00:25:42,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 00:25:42,616 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 00:25:42,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 00:25:42,617 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 00:25:42,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 00:25:42,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 00:25:42,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 00:25:42,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 00:25:42,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 00:25:42,619 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 00:25:42,619 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 00:25:42,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 00:25:42,620 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 00:25:42,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 00:25:42,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 00:25:42,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 00:25:42,621 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 00:25:42,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 00:25:42,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:25:42,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 00:25:42,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 00:25:42,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 00:25:42,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 00:25:42,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 00:25:42,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 00:25:42,624 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 -> 0aae719d835771c4602eac7b24cfefa200f147c0 [2019-11-28 00:25:42,958 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 00:25:42,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 00:25:42,976 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 00:25:42,978 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 00:25:42,978 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 00:25:42,979 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2019-11-28 00:25:43,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2bd3951/2c7a780dac73498cbccf4b385eb6b8b5/FLAG176fde588 [2019-11-28 00:25:43,524 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 00:25:43,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i10_o10-1.c [2019-11-28 00:25:43,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2bd3951/2c7a780dac73498cbccf4b385eb6b8b5/FLAG176fde588 [2019-11-28 00:25:43,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f2bd3951/2c7a780dac73498cbccf4b385eb6b8b5 [2019-11-28 00:25:43,868 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 00:25:43,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 00:25:43,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:43,872 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 00:25:43,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 00:25:43,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:43" (1/1) ... [2019-11-28 00:25:43,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36cbbb69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:43, skipping insertion in model container [2019-11-28 00:25:43,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:43" (1/1) ... [2019-11-28 00:25:43,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 00:25:43,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 00:25:44,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:44,127 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 00:25:44,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:44,156 INFO L208 MainTranslator]: Completed translation [2019-11-28 00:25:44,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44 WrapperNode [2019-11-28 00:25:44,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:44,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:44,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 00:25:44,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 00:25:44,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44" (1/1) ... [2019-11-28 00:25:44,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44" (1/1) ... [2019-11-28 00:25:44,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:44,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 00:25:44,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 00:25:44,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 00:25:44,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44" (1/1) ... [2019-11-28 00:25:44,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44" (1/1) ... [2019-11-28 00:25:44,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44" (1/1) ... [2019-11-28 00:25:44,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44" (1/1) ... [2019-11-28 00:25:44,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44" (1/1) ... [2019-11-28 00:25:44,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44" (1/1) ... [2019-11-28 00:25:44,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44" (1/1) ... [2019-11-28 00:25:44,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 00:25:44,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 00:25:44,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 00:25:44,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 00:25:44,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44" (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 00:25:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 00:25:44,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 00:25:44,329 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 00:25:44,329 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 00:25:44,476 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 00:25:44,476 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 00:25:44,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:44 BoogieIcfgContainer [2019-11-28 00:25:44,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 00:25:44,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 00:25:44,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 00:25:44,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 00:25:44,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:25:43" (1/3) ... [2019-11-28 00:25:44,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f19890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:44, skipping insertion in model container [2019-11-28 00:25:44,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:44" (2/3) ... [2019-11-28 00:25:44,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f19890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:44, skipping insertion in model container [2019-11-28 00:25:44,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:44" (3/3) ... [2019-11-28 00:25:44,486 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2019-11-28 00:25:44,493 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 00:25:44,500 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 00:25:44,511 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 00:25:44,533 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 00:25:44,533 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 00:25:44,533 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 00:25:44,534 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 00:25:44,534 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 00:25:44,534 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 00:25:44,534 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 00:25:44,534 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 00:25:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 00:25:44,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 00:25:44,558 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:44,559 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:44,559 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:44,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:44,565 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 00:25:44,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:44,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702576666] [2019-11-28 00:25:44,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:44,798 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 00:25:44,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702576666] [2019-11-28 00:25:44,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:25:44,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-28 00:25:44,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992938437] [2019-11-28 00:25:44,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 00:25:44,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:44,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 00:25:44,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-28 00:25:44,846 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 7 states. [2019-11-28 00:25:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:44,975 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-28 00:25:44,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 00:25:44,977 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-28 00:25:44,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:44,984 INFO L225 Difference]: With dead ends: 24 [2019-11-28 00:25:44,985 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 00:25:44,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-28 00:25:45,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 00:25:45,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 00:25:45,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 00:25:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 00:25:45,026 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 00:25:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:45,026 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 00:25:45,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 00:25:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 00:25:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 00:25:45,028 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:45,028 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:45,029 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 00:25:45,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:45,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089201611] [2019-11-28 00:25:45,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:45,176 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 00:25:45,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089201611] [2019-11-28 00:25:45,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283300322] [2019-11-28 00:25:45,177 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 00:25:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:45,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 00:25:45,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:45,327 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 00:25:45,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:45,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2019-11-28 00:25:45,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881538630] [2019-11-28 00:25:45,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 00:25:45,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:45,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 00:25:45,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:25:45,335 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 10 states. [2019-11-28 00:25:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:45,434 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 00:25:45,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 00:25:45,434 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-28 00:25:45,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:45,435 INFO L225 Difference]: With dead ends: 21 [2019-11-28 00:25:45,435 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 00:25:45,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-28 00:25:45,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 00:25:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 00:25:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 00:25:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 00:25:45,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 00:25:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:45,444 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 00:25:45,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 00:25:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 00:25:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 00:25:45,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:45,445 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:45,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:45,649 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:45,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 00:25:45,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:45,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386171300] [2019-11-28 00:25:45,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:45,808 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 00:25:45,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386171300] [2019-11-28 00:25:45,809 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742494992] [2019-11-28 00:25:45,809 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 00:25:45,840 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:25:45,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:45,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 00:25:45,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:45,886 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 00:25:45,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:45,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2019-11-28 00:25:45,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682616038] [2019-11-28 00:25:45,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 00:25:45,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:45,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 00:25:45,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-28 00:25:45,888 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2019-11-28 00:25:45,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:45,994 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 00:25:45,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 00:25:45,995 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2019-11-28 00:25:45,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:45,997 INFO L225 Difference]: With dead ends: 24 [2019-11-28 00:25:45,997 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 00:25:45,997 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-11-28 00:25:45,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 00:25:46,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 00:25:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 00:25:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 00:25:46,008 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 00:25:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:46,009 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 00:25:46,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 00:25:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 00:25:46,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 00:25:46,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:46,012 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:46,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:46,214 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:46,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:46,215 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 00:25:46,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:46,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068751109] [2019-11-28 00:25:46,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,410 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 00:25:46,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068751109] [2019-11-28 00:25:46,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069144013] [2019-11-28 00:25:46,412 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 00:25:46,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 00:25:46,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:46,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 00:25:46,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:46,491 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 00:25:46,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:46,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2019-11-28 00:25:46,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803048181] [2019-11-28 00:25:46,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 00:25:46,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:46,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 00:25:46,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-28 00:25:46,495 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 12 states. [2019-11-28 00:25:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:46,619 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-28 00:25:46,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 00:25:46,621 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-28 00:25:46,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:46,622 INFO L225 Difference]: With dead ends: 27 [2019-11-28 00:25:46,622 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 00:25:46,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-28 00:25:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 00:25:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 00:25:46,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 00:25:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-28 00:25:46,636 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-28 00:25:46,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:46,636 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-28 00:25:46,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 00:25:46,637 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-28 00:25:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 00:25:46,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:46,640 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:46,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:46,844 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:46,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:46,844 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-28 00:25:46,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:46,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170743413] [2019-11-28 00:25:46,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,122 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 00:25:47,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170743413] [2019-11-28 00:25:47,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127852045] [2019-11-28 00:25:47,123 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 00:25:47,160 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 00:25:47,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:47,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 00:25:47,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:47,208 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 00:25:47,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:47,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2019-11-28 00:25:47,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464011294] [2019-11-28 00:25:47,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 00:25:47,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:47,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 00:25:47,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-11-28 00:25:47,211 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 13 states. [2019-11-28 00:25:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:47,314 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-28 00:25:47,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 00:25:47,314 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-11-28 00:25:47,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:47,316 INFO L225 Difference]: With dead ends: 30 [2019-11-28 00:25:47,316 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 00:25:47,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2019-11-28 00:25:47,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 00:25:47,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 00:25:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 00:25:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 00:25:47,324 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-28 00:25:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:47,324 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 00:25:47,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 00:25:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 00:25:47,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 00:25:47,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:47,326 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:47,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:47,533 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:47,534 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-28 00:25:47,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:47,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210645180] [2019-11-28 00:25:47,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,746 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 00:25:47,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210645180] [2019-11-28 00:25:47,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801771977] [2019-11-28 00:25:47,748 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 00:25:47,793 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 00:25:47,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:47,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 00:25:47,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:47,862 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 00:25:47,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:47,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2019-11-28 00:25:47,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785428558] [2019-11-28 00:25:47,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 00:25:47,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 00:25:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-28 00:25:47,865 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 14 states. [2019-11-28 00:25:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:47,973 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-28 00:25:47,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 00:25:47,973 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2019-11-28 00:25:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:47,975 INFO L225 Difference]: With dead ends: 33 [2019-11-28 00:25:47,975 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 00:25:47,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2019-11-28 00:25:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 00:25:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 00:25:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 00:25:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-28 00:25:47,982 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-28 00:25:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:47,982 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-28 00:25:47,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 00:25:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-28 00:25:47,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-28 00:25:47,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:47,984 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:48,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:48,186 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:48,187 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-28 00:25:48,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:48,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843595468] [2019-11-28 00:25:48,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,608 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 00:25:48,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843595468] [2019-11-28 00:25:48,611 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885287564] [2019-11-28 00:25:48,611 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 00:25:48,692 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 00:25:48,693 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:48,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 00:25:48,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:48,969 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 00:25:48,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:48,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2019-11-28 00:25:48,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005054662] [2019-11-28 00:25:48,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-28 00:25:48,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:48,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-28 00:25:48,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2019-11-28 00:25:48,971 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 28 states. [2019-11-28 00:25:49,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:49,282 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-28 00:25:49,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 00:25:49,283 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 45 [2019-11-28 00:25:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:49,284 INFO L225 Difference]: With dead ends: 36 [2019-11-28 00:25:49,285 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 00:25:49,286 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2019-11-28 00:25:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 00:25:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-28 00:25:49,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 00:25:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-28 00:25:49,293 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-28 00:25:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:49,293 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-28 00:25:49,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-28 00:25:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-28 00:25:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-28 00:25:49,295 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:49,296 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:49,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:49,507 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:49,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:49,508 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-28 00:25:49,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:49,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534313918] [2019-11-28 00:25:49,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:49,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,757 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 00:25:49,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534313918] [2019-11-28 00:25:49,758 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420715993] [2019-11-28 00:25:49,758 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 00:25:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 00:25:49,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:49,858 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 00:25:49,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:49,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2019-11-28 00:25:49,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539384685] [2019-11-28 00:25:49,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 00:25:49,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:49,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 00:25:49,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-28 00:25:49,861 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2019-11-28 00:25:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:49,991 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-28 00:25:49,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 00:25:49,993 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-11-28 00:25:49,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:49,994 INFO L225 Difference]: With dead ends: 39 [2019-11-28 00:25:49,994 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 00:25:49,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2019-11-28 00:25:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 00:25:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-28 00:25:49,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 00:25:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-28 00:25:50,000 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-28 00:25:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:50,001 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-28 00:25:50,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 00:25:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-28 00:25:50,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-28 00:25:50,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:50,002 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:50,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:50,203 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:50,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-28 00:25:50,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:50,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854492925] [2019-11-28 00:25:50,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,454 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 00:25:50,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854492925] [2019-11-28 00:25:50,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992025257] [2019-11-28 00:25:50,455 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 00:25:50,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:25:50,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:50,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 00:25:50,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:50,560 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 00:25:50,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:50,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2019-11-28 00:25:50,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109882244] [2019-11-28 00:25:50,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-28 00:25:50,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:50,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-28 00:25:50,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-28 00:25:50,566 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 17 states. [2019-11-28 00:25:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:50,703 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-28 00:25:50,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 00:25:50,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2019-11-28 00:25:50,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:50,706 INFO L225 Difference]: With dead ends: 42 [2019-11-28 00:25:50,706 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 00:25:50,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2019-11-28 00:25:50,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 00:25:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-28 00:25:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-28 00:25:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-28 00:25:50,713 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-28 00:25:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:50,713 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-28 00:25:50,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-28 00:25:50,714 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-28 00:25:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-28 00:25:50,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:50,715 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:50,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:50,921 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:50,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-28 00:25:50,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:50,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027943710] [2019-11-28 00:25:50,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,240 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 00:25:51,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027943710] [2019-11-28 00:25:51,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116914552] [2019-11-28 00:25:51,242 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 00:25:51,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 00:25:51,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:51,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 00:25:51,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:51,726 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 00:25:51,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:51,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 37 [2019-11-28 00:25:51,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796079399] [2019-11-28 00:25:51,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-28 00:25:51,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:51,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-28 00:25:51,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2019-11-28 00:25:51,729 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 37 states. [2019-11-28 00:25:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:52,208 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-28 00:25:52,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-28 00:25:52,208 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 63 [2019-11-28 00:25:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:52,210 INFO L225 Difference]: With dead ends: 45 [2019-11-28 00:25:52,210 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 00:25:52,212 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2019-11-28 00:25:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 00:25:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-28 00:25:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-28 00:25:52,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-28 00:25:52,217 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-28 00:25:52,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:52,218 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-28 00:25:52,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-28 00:25:52,218 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-28 00:25:52,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-28 00:25:52,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:52,219 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:52,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:52,423 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:52,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:52,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-28 00:25:52,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:52,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489770056] [2019-11-28 00:25:52,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 00:25:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 00:25:52,463 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 00:25:52,463 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 00:25:52,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:25:52 BoogieIcfgContainer [2019-11-28 00:25:52,502 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 00:25:52,502 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 00:25:52,502 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 00:25:52,502 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 00:25:52,503 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:44" (3/4) ... [2019-11-28 00:25:52,504 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 00:25:52,561 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 00:25:52,561 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 00:25:52,563 INFO L168 Benchmark]: Toolchain (without parser) took 8692.96 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 283.6 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -142.3 MB). Peak memory consumption was 141.4 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:52,565 INFO L168 Benchmark]: CDTParser took 0.64 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 00:25:52,567 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.35 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 00:25:52,568 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.86 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:25:52,570 INFO L168 Benchmark]: Boogie Preprocessor took 79.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -185.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:52,572 INFO L168 Benchmark]: RCFGBuilder took 208.44 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: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:52,573 INFO L168 Benchmark]: TraceAbstraction took 8022.81 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 147.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.7 MB). Peak memory consumption was 162.6 MB. Max. memory is 11.5 GB. [2019-11-28 00:25:52,579 INFO L168 Benchmark]: Witness Printer took 59.11 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 00:25:52,581 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64 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 286.35 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 30.86 ms. Allocated memory is still 1.0 GB. Free memory is still 946.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 79.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 946.9 MB in the beginning and 1.1 GB in the end (delta: -185.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 208.44 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: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8022.81 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 147.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.7 MB). Peak memory consumption was 162.6 MB. Max. memory is 11.5 GB. * Witness Printer took 59.11 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] int input = 10; [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] 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: 7.9s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 179 SDslu, 555 SDs, 0 SdLazy, 604 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 617 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 2.8s 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: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 780 NumberOfCodeBlocks, 775 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 692 ConstructedInterpolants, 0 QuantifiedInterpolants, 75824 SizeOfPredicates, 46 NumberOfNonLiveVariables, 826 ConjunctsInSsa, 126 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...