./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_15x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/sum_15x0-1.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 7f140b11074e684b22c263036fee9fde5b4c087a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:30:09,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:30:09,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:30:09,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:30:09,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:30:09,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:30:09,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:30:09,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:30:09,684 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:30:09,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:30:09,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:30:09,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:30:09,691 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:30:09,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:30:09,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:30:09,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:30:09,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:30:09,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:30:09,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:30:09,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:30:09,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:30:09,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:30:09,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:30:09,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:30:09,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:30:09,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:30:09,717 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:30:09,719 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:30:09,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:30:09,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:30:09,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:30:09,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:30:09,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:30:09,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:30:09,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:30:09,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:30:09,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:30:09,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:30:09,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:30:09,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:30:09,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:30:09,728 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:30:09,751 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:30:09,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:30:09,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:30:09,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:30:09,756 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:30:09,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:30:09,757 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:30:09,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:30:09,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:30:09,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:30:09,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:30:09,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:30:09,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:30:09,758 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:30:09,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:30:09,759 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:30:09,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:30:09,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:30:09,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:30:09,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:30:09,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:30:09,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:30:09,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:30:09,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:30:09,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:30:09,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:30:09,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:30:09,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:30:09,762 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:30:09,762 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 -> 7f140b11074e684b22c263036fee9fde5b4c087a [2019-11-28 17:30:10,066 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:30:10,079 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:30:10,083 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:30:10,085 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:30:10,085 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:30:10,086 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2019-11-28 17:30:10,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c62f5e71/429aa18b811748a09435c7045e031654/FLAGdbbb1d2a0 [2019-11-28 17:30:10,610 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:30:10,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2019-11-28 17:30:10,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c62f5e71/429aa18b811748a09435c7045e031654/FLAGdbbb1d2a0 [2019-11-28 17:30:10,980 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c62f5e71/429aa18b811748a09435c7045e031654 [2019-11-28 17:30:10,983 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:30:10,985 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:30:10,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:30:10,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:30:10,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:30:10,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:30:10" (1/1) ... [2019-11-28 17:30:10,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@477caf30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:10, skipping insertion in model container [2019-11-28 17:30:10,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:30:10" (1/1) ... [2019-11-28 17:30:11,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:30:11,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:30:11,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:30:11,184 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:30:11,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:30:11,217 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:30:11,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11 WrapperNode [2019-11-28 17:30:11,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:30:11,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:30:11,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:30:11,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:30:11,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11" (1/1) ... [2019-11-28 17:30:11,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11" (1/1) ... [2019-11-28 17:30:11,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:30:11,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:30:11,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:30:11,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:30:11,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11" (1/1) ... [2019-11-28 17:30:11,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11" (1/1) ... [2019-11-28 17:30:11,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11" (1/1) ... [2019-11-28 17:30:11,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11" (1/1) ... [2019-11-28 17:30:11,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11" (1/1) ... [2019-11-28 17:30:11,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11" (1/1) ... [2019-11-28 17:30:11,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11" (1/1) ... [2019-11-28 17:30:11,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:30:11,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:30:11,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:30:11,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:30:11,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11" (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 17:30:11,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:30:11,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:30:11,383 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-11-28 17:30:11,384 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-11-28 17:30:11,544 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:30:11,544 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:30:11,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:30:11 BoogieIcfgContainer [2019-11-28 17:30:11,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:30:11,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:30:11,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:30:11,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:30:11,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:30:10" (1/3) ... [2019-11-28 17:30:11,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc20a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:30:11, skipping insertion in model container [2019-11-28 17:30:11,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:30:11" (2/3) ... [2019-11-28 17:30:11,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc20a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:30:11, skipping insertion in model container [2019-11-28 17:30:11,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:30:11" (3/3) ... [2019-11-28 17:30:11,552 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2019-11-28 17:30:11,560 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:30:11,564 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:30:11,573 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:30:11,594 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:30:11,595 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:30:11,595 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:30:11,595 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:30:11,595 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:30:11,595 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:30:11,595 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:30:11,596 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:30:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 17:30:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:30:11,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:11,619 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:11,619 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:11,625 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 17:30:11,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:11,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95993051] [2019-11-28 17:30:11,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:11,859 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 17:30:11,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95993051] [2019-11-28 17:30:11,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:30:11,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:30:11,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588428123] [2019-11-28 17:30:11,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:30:11,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:30:11,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:30:11,892 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-28 17:30:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:11,987 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-28 17:30:11,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:30:11,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:30:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:11,999 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:30:12,000 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 17:30:12,003 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 17:30:12,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 17:30:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 17:30:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 17:30:12,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 17:30:12,047 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 17:30:12,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:12,047 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 17:30:12,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:30:12,048 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 17:30:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 17:30:12,049 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:12,050 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:12,050 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:12,051 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 17:30:12,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:12,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408164080] [2019-11-28 17:30:12,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,221 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 17:30:12,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408164080] [2019-11-28 17:30:12,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155553879] [2019-11-28 17:30:12,225 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 17:30:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:30:12,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:12,356 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 17:30:12,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:12,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 17:30:12,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020378310] [2019-11-28 17:30:12,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 17:30:12,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:12,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 17:30:12,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:30:12,361 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2019-11-28 17:30:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:12,450 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 17:30:12,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 17:30:12,451 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-28 17:30:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:12,453 INFO L225 Difference]: With dead ends: 21 [2019-11-28 17:30:12,453 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:30:12,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:30:12,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:30:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 17:30:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:30:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 17:30:12,460 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 17:30:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:12,461 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 17:30:12,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 17:30:12,461 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 17:30:12,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:30:12,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:12,462 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:12,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:12,667 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:12,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 17:30:12,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:12,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511610914] [2019-11-28 17:30:12,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:12,838 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 17:30:12,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511610914] [2019-11-28 17:30:12,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753235187] [2019-11-28 17:30:12,840 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 17:30:12,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:12,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:12,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:30:12,889 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:12,923 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 17:30:12,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:12,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-28 17:30:12,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956348269] [2019-11-28 17:30:12,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:30:12,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:12,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:30:12,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:30:12,934 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 8 states. [2019-11-28 17:30:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:13,029 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 17:30:13,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:30:13,030 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-28 17:30:13,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:13,032 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:30:13,032 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 17:30:13,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:30:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 17:30:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 17:30:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 17:30:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 17:30:13,046 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 17:30:13,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:13,047 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 17:30:13,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:30:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 17:30:13,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 17:30:13,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:13,050 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:13,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:13,254 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:13,254 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 17:30:13,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:13,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138857425] [2019-11-28 17:30:13,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,476 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 17:30:13,476 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138857425] [2019-11-28 17:30:13,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803048181] [2019-11-28 17:30:13,477 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 17:30:13,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 17:30:13,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:13,518 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 17:30:13,521 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:13,555 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 17:30:13,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:13,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-28 17:30:13,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849642621] [2019-11-28 17:30:13,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 17:30:13,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:13,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 17:30:13,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:30:13,559 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2019-11-28 17:30:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:13,656 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-28 17:30:13,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:30:13,657 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-28 17:30:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:13,658 INFO L225 Difference]: With dead ends: 27 [2019-11-28 17:30:13,658 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 17:30:13,660 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:30:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 17:30:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 17:30:13,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 17:30:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-28 17:30:13,666 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-28 17:30:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:13,667 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-28 17:30:13,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 17:30:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-28 17:30:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 17:30:13,669 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:13,669 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:13,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:13,873 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-28 17:30:13,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:13,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881350377] [2019-11-28 17:30:13,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,094 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 17:30:14,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881350377] [2019-11-28 17:30:14,096 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141010788] [2019-11-28 17:30:14,096 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 17:30:14,133 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:30:14,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:14,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 17:30:14,137 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:14,176 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 17:30:14,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:14,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-28 17:30:14,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815683960] [2019-11-28 17:30:14,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:30:14,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:14,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:30:14,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:30:14,185 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-11-28 17:30:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:14,282 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-28 17:30:14,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:30:14,282 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-11-28 17:30:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:14,284 INFO L225 Difference]: With dead ends: 30 [2019-11-28 17:30:14,285 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 17:30:14,286 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:30:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 17:30:14,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 17:30:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:30:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 17:30:14,298 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-28 17:30:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:14,299 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 17:30:14,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:30:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 17:30:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 17:30:14,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:14,302 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:14,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:14,506 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:14,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:14,507 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-28 17:30:14,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:14,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138692526] [2019-11-28 17:30:14,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:14,736 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 17:30:14,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138692526] [2019-11-28 17:30:14,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504637906] [2019-11-28 17:30:14,738 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 17:30:14,787 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 17:30:14,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:14,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 17:30:14,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:14,830 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 17:30:14,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:14,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-28 17:30:14,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716637594] [2019-11-28 17:30:14,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 17:30:14,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:14,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 17:30:14,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:30:14,833 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2019-11-28 17:30:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:14,932 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-28 17:30:14,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:30:14,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2019-11-28 17:30:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:14,934 INFO L225 Difference]: With dead ends: 33 [2019-11-28 17:30:14,934 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 17:30:14,935 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2019-11-28 17:30:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 17:30:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 17:30:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 17:30:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-28 17:30:14,944 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-28 17:30:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:14,944 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-28 17:30:14,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 17:30:14,945 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-28 17:30:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-28 17:30:14,946 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:14,946 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:15,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:15,159 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:15,161 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-28 17:30:15,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:15,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635788377] [2019-11-28 17:30:15,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,453 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 17:30:15,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635788377] [2019-11-28 17:30:15,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700002991] [2019-11-28 17:30:15,454 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 17:30:15,501 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 17:30:15,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:15,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 17:30:15,511 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:15,562 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 17:30:15,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:15,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-28 17:30:15,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205971245] [2019-11-28 17:30:15,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:30:15,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:15,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:30:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:30:15,566 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2019-11-28 17:30:15,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:15,688 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-28 17:30:15,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:30:15,688 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-11-28 17:30:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:15,690 INFO L225 Difference]: With dead ends: 36 [2019-11-28 17:30:15,690 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 17:30:15,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2019-11-28 17:30:15,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 17:30:15,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-28 17:30:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 17:30:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-28 17:30:15,697 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-28 17:30:15,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:15,698 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-28 17:30:15,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:30:15,698 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-28 17:30:15,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-28 17:30:15,699 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:15,700 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:15,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:15,926 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:15,927 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-28 17:30:15,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:15,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627300014] [2019-11-28 17:30:15,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,154 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 17:30:16,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627300014] [2019-11-28 17:30:16,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517780538] [2019-11-28 17:30:16,155 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 17:30:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 17:30:16,198 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:16,252 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 17:30:16,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:16,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-28 17:30:16,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186163071] [2019-11-28 17:30:16,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 17:30:16,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:16,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 17:30:16,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:30:16,255 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 13 states. [2019-11-28 17:30:16,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:16,395 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-28 17:30:16,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 17:30:16,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-28 17:30:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:16,396 INFO L225 Difference]: With dead ends: 39 [2019-11-28 17:30:16,396 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 17:30:16,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2019-11-28 17:30:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 17:30:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-28 17:30:16,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 17:30:16,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-28 17:30:16,403 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-28 17:30:16,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:16,403 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-28 17:30:16,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 17:30:16,403 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-28 17:30:16,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-28 17:30:16,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:16,405 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:16,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:16,615 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:16,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:16,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-28 17:30:16,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:16,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202358246] [2019-11-28 17:30:16,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:16,917 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 17:30:16,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202358246] [2019-11-28 17:30:16,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143277086] [2019-11-28 17:30:16,919 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 17:30:16,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:16,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:16,989 INFO L264 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 17:30:16,992 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:17,025 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 17:30:17,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:17,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-28 17:30:17,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335243109] [2019-11-28 17:30:17,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:30:17,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:30:17,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:30:17,030 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 14 states. [2019-11-28 17:30:17,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:17,186 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-28 17:30:17,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:30:17,187 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2019-11-28 17:30:17,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:17,189 INFO L225 Difference]: With dead ends: 42 [2019-11-28 17:30:17,190 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 17:30:17,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2019-11-28 17:30:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 17:30:17,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-28 17:30:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-28 17:30:17,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-28 17:30:17,204 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-28 17:30:17,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:17,205 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-28 17:30:17,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:30:17,205 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-28 17:30:17,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-28 17:30:17,209 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:17,209 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:17,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:17,414 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:17,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:17,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-28 17:30:17,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:17,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972396512] [2019-11-28 17:30:17,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:17,694 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 17:30:17,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972396512] [2019-11-28 17:30:17,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416574422] [2019-11-28 17:30:17,695 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 17:30:17,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 17:30:17,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:17,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 17:30:17,769 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:17,830 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 17:30:17,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:17,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-28 17:30:17,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289273748] [2019-11-28 17:30:17,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:30:17,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:17,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:30:17,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:30:17,834 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 15 states. [2019-11-28 17:30:17,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:17,969 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-28 17:30:17,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 17:30:17,970 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2019-11-28 17:30:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:17,971 INFO L225 Difference]: With dead ends: 45 [2019-11-28 17:30:17,971 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 17:30:17,973 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2019-11-28 17:30:17,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 17:30:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-28 17:30:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-28 17:30:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-28 17:30:17,979 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-28 17:30:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:17,979 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-28 17:30:17,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:30:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-28 17:30:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-28 17:30:17,980 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:17,980 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:18,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:18,184 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-28 17:30:18,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:18,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142892821] [2019-11-28 17:30:18,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-28 17:30:18,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142892821] [2019-11-28 17:30:18,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499878125] [2019-11-28 17:30:18,519 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:18,572 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:30:18,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:18,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 17:30:18,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-28 17:30:18,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:18,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-28 17:30:18,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25884394] [2019-11-28 17:30:18,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 17:30:18,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:18,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 17:30:18,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:30:18,625 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2019-11-28 17:30:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:18,771 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-28 17:30:18,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 17:30:18,772 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-11-28 17:30:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:18,773 INFO L225 Difference]: With dead ends: 48 [2019-11-28 17:30:18,773 INFO L226 Difference]: Without dead ends: 44 [2019-11-28 17:30:18,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2019-11-28 17:30:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-28 17:30:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-28 17:30:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 17:30:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-28 17:30:18,788 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-28 17:30:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:18,789 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-28 17:30:18,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 17:30:18,790 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-28 17:30:18,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-28 17:30:18,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:18,795 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:18,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:18,999 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:19,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-28 17:30:19,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:19,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24403166] [2019-11-28 17:30:19,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-28 17:30:19,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24403166] [2019-11-28 17:30:19,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082938232] [2019-11-28 17:30:19,333 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:19,419 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-28 17:30:19,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:19,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-28 17:30:19,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-28 17:30:19,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:19,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-28 17:30:19,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122738726] [2019-11-28 17:30:19,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-28 17:30:19,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:19,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-28 17:30:19,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-11-28 17:30:19,490 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 17 states. [2019-11-28 17:30:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:19,667 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-28 17:30:19,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 17:30:19,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-11-28 17:30:19,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:19,669 INFO L225 Difference]: With dead ends: 51 [2019-11-28 17:30:19,669 INFO L226 Difference]: Without dead ends: 47 [2019-11-28 17:30:19,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2019-11-28 17:30:19,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-28 17:30:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-28 17:30:19,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-28 17:30:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-28 17:30:19,679 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-28 17:30:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:19,682 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-28 17:30:19,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-28 17:30:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-28 17:30:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-28 17:30:19,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:19,684 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:19,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:19,895 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:19,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:19,896 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-28 17:30:19,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:19,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486812480] [2019-11-28 17:30:19,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-28 17:30:20,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486812480] [2019-11-28 17:30:20,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385472175] [2019-11-28 17:30:20,323 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:20,394 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-28 17:30:20,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:20,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-28 17:30:20,398 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-28 17:30:20,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:20,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-28 17:30:20,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828528608] [2019-11-28 17:30:20,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-28 17:30:20,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:20,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-28 17:30:20,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:30:20,452 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2019-11-28 17:30:20,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:20,644 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-28 17:30:20,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 17:30:20,645 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-11-28 17:30:20,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:20,646 INFO L225 Difference]: With dead ends: 54 [2019-11-28 17:30:20,646 INFO L226 Difference]: Without dead ends: 50 [2019-11-28 17:30:20,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2019-11-28 17:30:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-28 17:30:20,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-28 17:30:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-28 17:30:20,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-28 17:30:20,653 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-28 17:30:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:20,654 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-28 17:30:20,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-28 17:30:20,654 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-28 17:30:20,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-28 17:30:20,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:20,655 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:20,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:20,859 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:20,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:20,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-28 17:30:20,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:20,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163725582] [2019-11-28 17:30:20,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-28 17:30:21,432 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163725582] [2019-11-28 17:30:21,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935931876] [2019-11-28 17:30:21,435 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,495 INFO L264 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 17:30:21,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-28 17:30:21,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:21,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-28 17:30:21,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013363086] [2019-11-28 17:30:21,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-28 17:30:21,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:21,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-28 17:30:21,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-11-28 17:30:21,542 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 19 states. [2019-11-28 17:30:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:21,731 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-28 17:30:21,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-28 17:30:21,732 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2019-11-28 17:30:21,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:21,733 INFO L225 Difference]: With dead ends: 57 [2019-11-28 17:30:21,733 INFO L226 Difference]: Without dead ends: 53 [2019-11-28 17:30:21,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2019-11-28 17:30:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-28 17:30:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-28 17:30:21,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-28 17:30:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-28 17:30:21,745 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-28 17:30:21,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:21,745 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-28 17:30:21,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-28 17:30:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-28 17:30:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-28 17:30:21,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:21,747 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:21,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:21,952 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:21,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-28 17:30:21,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:21,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173315245] [2019-11-28 17:30:21,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-28 17:30:22,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173315245] [2019-11-28 17:30:22,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722525636] [2019-11-28 17:30:22,474 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:22,544 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:22,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:22,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 17:30:22,548 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-28 17:30:22,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:22,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-28 17:30:22,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328870717] [2019-11-28 17:30:22,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-28 17:30:22,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:22,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 17:30:22,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-11-28 17:30:22,595 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 20 states. [2019-11-28 17:30:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:22,804 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-28 17:30:22,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 17:30:22,804 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 93 [2019-11-28 17:30:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:22,805 INFO L225 Difference]: With dead ends: 60 [2019-11-28 17:30:22,805 INFO L226 Difference]: Without dead ends: 56 [2019-11-28 17:30:22,806 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2019-11-28 17:30:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-28 17:30:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-28 17:30:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-28 17:30:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-28 17:30:22,812 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-28 17:30:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:22,812 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-28 17:30:22,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-28 17:30:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-28 17:30:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-28 17:30:22,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:22,814 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:23,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:23,018 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:23,018 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-28 17:30:23,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:23,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133609663] [2019-11-28 17:30:23,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-28 17:30:24,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133609663] [2019-11-28 17:30:24,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729055343] [2019-11-28 17:30:24,459 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:24,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-28 17:30:24,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:24,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 137 conjunts are in the unsatisfiable core [2019-11-28 17:30:24,534 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2019-11-28 17:30:26,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:26,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 74 [2019-11-28 17:30:26,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57483399] [2019-11-28 17:30:26,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-11-28 17:30:26,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:26,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-11-28 17:30:26,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=5032, Unknown=0, NotChecked=0, Total=5402 [2019-11-28 17:30:26,534 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 74 states. [2019-11-28 17:30:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:29,682 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-11-28 17:30:29,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-28 17:30:29,683 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 99 [2019-11-28 17:30:29,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:29,683 INFO L225 Difference]: With dead ends: 59 [2019-11-28 17:30:29,683 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:30:29,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=902, Invalid=10440, Unknown=0, NotChecked=0, Total=11342 [2019-11-28 17:30:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:30:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:30:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:30:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:30:29,688 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 99 [2019-11-28 17:30:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:29,689 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:30:29,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-11-28 17:30:29,689 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:30:29,689 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:30:29,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:29,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:30:29,922 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:30:29,922 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:30:29,923 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:30:29,923 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2019-11-28 17:30:29,923 INFO L246 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2019-11-28 17:30:29,923 INFO L246 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-28 17:30:29,923 INFO L242 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 15) [2019-11-28 17:30:29,924 INFO L246 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2019-11-28 17:30:29,924 INFO L246 CegarLoopResult]: For program point L11(lines 11 18) no Hoare annotation was computed. [2019-11-28 17:30:29,924 INFO L246 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2019-11-28 17:30:29,924 INFO L242 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2019-11-28 17:30:29,924 INFO L246 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2019-11-28 17:30:29,924 INFO L246 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2019-11-28 17:30:29,925 INFO L246 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2019-11-28 17:30:29,925 INFO L249 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2019-11-28 17:30:29,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:30:29 BoogieIcfgContainer [2019-11-28 17:30:29,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:30:29,930 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:30:29,930 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:30:29,930 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:30:29,931 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:30:11" (3/4) ... [2019-11-28 17:30:29,934 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:30:29,944 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2019-11-28 17:30:29,948 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 17:30:29,949 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-28 17:30:29,982 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:30:29,982 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:30:29,984 INFO L168 Benchmark]: Toolchain (without parser) took 18998.94 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 449.3 MB). Free memory was 961.7 MB in the beginning and 1.4 GB in the end (delta: -425.6 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:29,985 INFO L168 Benchmark]: CDTParser took 0.38 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 17:30:29,985 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.55 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:29,985 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.83 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:29,986 INFO L168 Benchmark]: Boogie Preprocessor took 73.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -191.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:29,986 INFO L168 Benchmark]: RCFGBuilder took 224.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:29,987 INFO L168 Benchmark]: TraceAbstraction took 18383.33 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 303.0 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -265.7 MB). Peak memory consumption was 37.3 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:29,987 INFO L168 Benchmark]: Witness Printer took 51.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:29,990 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 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 232.55 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 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 28.83 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 73.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -191.9 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 224.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 18383.33 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 303.0 MB). Free memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: -265.7 MB). Peak memory consumption was 37.3 MB. Max. memory is 11.5 GB. * Witness Printer took 51.98 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 18.2s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 456 SDslu, 1196 SDs, 0 SdLazy, 2197 SolverSat, 153 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1451 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=15, 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, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 14 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 1719 NumberOfCodeBlocks, 1719 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1688 ConstructedInterpolants, 0 QuantifiedInterpolants, 386556 SizeOfPredicates, 154 NumberOfNonLiveVariables, 2580 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 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 correct! Received shutdown request...