./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2e94e6aa Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-2e94e6a [2018-12-31 10:07:57,030 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-31 10:07:57,032 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-31 10:07:57,044 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-31 10:07:57,044 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-31 10:07:57,045 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-31 10:07:57,047 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-31 10:07:57,048 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-31 10:07:57,050 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-31 10:07:57,051 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-31 10:07:57,052 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-31 10:07:57,052 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-31 10:07:57,053 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-31 10:07:57,054 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-31 10:07:57,055 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-31 10:07:57,056 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-31 10:07:57,057 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-31 10:07:57,059 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-31 10:07:57,061 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-31 10:07:57,063 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-31 10:07:57,064 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-31 10:07:57,066 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-31 10:07:57,068 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-31 10:07:57,069 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-31 10:07:57,069 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-31 10:07:57,070 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-31 10:07:57,071 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-31 10:07:57,072 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-31 10:07:57,073 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-31 10:07:57,074 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-31 10:07:57,074 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-31 10:07:57,075 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-31 10:07:57,075 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-31 10:07:57,076 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-31 10:07:57,077 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-31 10:07:57,077 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-31 10:07:57,078 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-31 10:07:57,093 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-31 10:07:57,093 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-31 10:07:57,094 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-31 10:07:57,095 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-31 10:07:57,095 INFO L133 SettingsManager]: * Use SBE=true [2018-12-31 10:07:57,095 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-31 10:07:57,095 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-31 10:07:57,095 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-31 10:07:57,096 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-31 10:07:57,096 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-31 10:07:57,096 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-31 10:07:57,096 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-31 10:07:57,096 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-31 10:07:57,096 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-31 10:07:57,097 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-31 10:07:57,097 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-31 10:07:57,097 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-31 10:07:57,097 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-31 10:07:57,097 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-31 10:07:57,097 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-31 10:07:57,098 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-31 10:07:57,098 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 10:07:57,098 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-31 10:07:57,098 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-31 10:07:57,098 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-31 10:07:57,098 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-31 10:07:57,099 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-31 10:07:57,099 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-31 10:07:57,099 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4039dcb878ce4fadab8efdd435e8ec3d803b5cc8 [2018-12-31 10:07:57,158 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-31 10:07:57,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-31 10:07:57,184 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-31 10:07:57,186 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-31 10:07:57,186 INFO L276 PluginConnector]: CDTParser initialized [2018-12-31 10:07:57,188 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c [2018-12-31 10:07:57,251 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d780f5e1/bb06d323514c4db6ad552cb6ae664baa/FLAG40dda8561 [2018-12-31 10:07:57,669 INFO L307 CDTParser]: Found 1 translation units. [2018-12-31 10:07:57,670 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/recursive-simple/sum_25x0_true-unreach-call_true-termination.c [2018-12-31 10:07:57,675 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d780f5e1/bb06d323514c4db6ad552cb6ae664baa/FLAG40dda8561 [2018-12-31 10:07:58,040 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d780f5e1/bb06d323514c4db6ad552cb6ae664baa [2018-12-31 10:07:58,044 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-31 10:07:58,046 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-31 10:07:58,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:58,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-31 10:07:58,054 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-31 10:07:58,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:58" (1/1) ... [2018-12-31 10:07:58,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3361ed09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58, skipping insertion in model container [2018-12-31 10:07:58,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.12 10:07:58" (1/1) ... [2018-12-31 10:07:58,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-31 10:07:58,089 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-31 10:07:58,345 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:58,351 INFO L191 MainTranslator]: Completed pre-run [2018-12-31 10:07:58,375 INFO L204 PostProcessor]: Analyzing one entry point: main [2018-12-31 10:07:58,394 INFO L195 MainTranslator]: Completed translation [2018-12-31 10:07:58,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58 WrapperNode [2018-12-31 10:07:58,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-31 10:07:58,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:58,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-31 10:07:58,397 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-31 10:07:58,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58" (1/1) ... [2018-12-31 10:07:58,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58" (1/1) ... [2018-12-31 10:07:58,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-31 10:07:58,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-31 10:07:58,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-31 10:07:58,444 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-31 10:07:58,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58" (1/1) ... [2018-12-31 10:07:58,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58" (1/1) ... [2018-12-31 10:07:58,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58" (1/1) ... [2018-12-31 10:07:58,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58" (1/1) ... [2018-12-31 10:07:58,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58" (1/1) ... [2018-12-31 10:07:58,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58" (1/1) ... [2018-12-31 10:07:58,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58" (1/1) ... [2018-12-31 10:07:58,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-31 10:07:58,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-31 10:07:58,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-31 10:07:58,466 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-31 10:07:58,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-31 10:07:58,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-31 10:07:58,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-31 10:07:58,640 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2018-12-31 10:07:58,640 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2018-12-31 10:07:58,847 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-31 10:07:58,848 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-31 10:07:58,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:58 BoogieIcfgContainer [2018-12-31 10:07:58,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-31 10:07:58,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-31 10:07:58,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-31 10:07:58,854 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-31 10:07:58,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.12 10:07:58" (1/3) ... [2018-12-31 10:07:58,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2210a24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:58, skipping insertion in model container [2018-12-31 10:07:58,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.12 10:07:58" (2/3) ... [2018-12-31 10:07:58,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2210a24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.12 10:07:58, skipping insertion in model container [2018-12-31 10:07:58,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:58" (3/3) ... [2018-12-31 10:07:58,857 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0_true-unreach-call_true-termination.c [2018-12-31 10:07:58,870 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-31 10:07:58,879 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-31 10:07:58,899 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-31 10:07:58,934 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-31 10:07:58,934 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-31 10:07:58,935 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-31 10:07:58,935 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-31 10:07:58,935 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-31 10:07:58,935 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-31 10:07:58,936 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-31 10:07:58,936 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-31 10:07:58,936 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-31 10:07:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2018-12-31 10:07:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-12-31 10:07:58,965 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:58,966 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:58,969 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:58,976 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2018-12-31 10:07:58,979 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:58,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:59,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:59,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:59,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-31 10:07:59,380 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-31 10:07:59,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-31 10:07:59,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-31 10:07:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-31 10:07:59,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-31 10:07:59,406 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2018-12-31 10:07:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:07:59,573 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2018-12-31 10:07:59,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-31 10:07:59,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-12-31 10:07:59,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:07:59,585 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:07:59,585 INFO L226 Difference]: Without dead ends: 14 [2018-12-31 10:07:59,589 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:07:59,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-12-31 10:07:59,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-12-31 10:07:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-12-31 10:07:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-12-31 10:07:59,632 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2018-12-31 10:07:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:07:59,633 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-12-31 10:07:59,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-31 10:07:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-12-31 10:07:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-31 10:07:59,635 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:07:59,635 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:07:59,635 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:07:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:07:59,636 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2018-12-31 10:07:59,636 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:07:59,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:07:59,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:59,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:59,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:07:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 10:07:59,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:07:59,769 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:07:59,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:07:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:07:59,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:07:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-31 10:07:59,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:07:59,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-12-31 10:07:59,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-31 10:07:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-31 10:07:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-31 10:07:59,916 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 6 states. [2018-12-31 10:08:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:00,428 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-12-31 10:08:00,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-31 10:08:00,429 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-12-31 10:08:00,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:00,431 INFO L225 Difference]: With dead ends: 21 [2018-12-31 10:08:00,431 INFO L226 Difference]: Without dead ends: 17 [2018-12-31 10:08:00,432 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:08:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-31 10:08:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-31 10:08:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-31 10:08:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-31 10:08:00,438 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-12-31 10:08:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:00,439 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-31 10:08:00,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-31 10:08:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-31 10:08:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-31 10:08:00,441 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:00,441 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:00,442 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2018-12-31 10:08:00,442 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:00,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:00,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:00,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-31 10:08:00,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:00,695 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:00,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:08:00,755 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:08:00,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:00,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-31 10:08:00,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:00,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-31 10:08:00,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-31 10:08:00,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-31 10:08:00,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-12-31 10:08:00,823 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2018-12-31 10:08:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:01,143 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2018-12-31 10:08:01,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-31 10:08:01,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-12-31 10:08:01,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:01,144 INFO L225 Difference]: With dead ends: 24 [2018-12-31 10:08:01,145 INFO L226 Difference]: Without dead ends: 20 [2018-12-31 10:08:01,145 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:08:01,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-12-31 10:08:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-12-31 10:08:01,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-31 10:08:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-31 10:08:01,151 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2018-12-31 10:08:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:01,152 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-31 10:08:01,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-31 10:08:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-31 10:08:01,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-31 10:08:01,153 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:01,154 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:01,154 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:01,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:01,154 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2018-12-31 10:08:01,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:01,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:01,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:01,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:01,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-31 10:08:01,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:01,341 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:01,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:08:01,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-31 10:08:01,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:01,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-31 10:08:01,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:01,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-31 10:08:01,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-31 10:08:01,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-31 10:08:01,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-31 10:08:01,430 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2018-12-31 10:08:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:01,865 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-31 10:08:01,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-31 10:08:01,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-12-31 10:08:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:01,867 INFO L225 Difference]: With dead ends: 27 [2018-12-31 10:08:01,867 INFO L226 Difference]: Without dead ends: 23 [2018-12-31 10:08:01,868 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:08:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-12-31 10:08:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-12-31 10:08:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-12-31 10:08:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-12-31 10:08:01,877 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2018-12-31 10:08:01,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:01,877 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-12-31 10:08:01,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-31 10:08:01,877 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-12-31 10:08:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-31 10:08:01,879 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:01,880 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:01,881 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:01,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2018-12-31 10:08:01,881 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:01,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:01,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:01,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:01,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-31 10:08:02,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:02,027 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:02,043 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:08:02,080 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:08:02,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:02,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-12-31 10:08:02,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:02,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-31 10:08:02,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-31 10:08:02,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-31 10:08:02,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-31 10:08:02,121 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2018-12-31 10:08:02,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:02,267 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-12-31 10:08:02,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-31 10:08:02,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-31 10:08:02,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:02,269 INFO L225 Difference]: With dead ends: 30 [2018-12-31 10:08:02,269 INFO L226 Difference]: Without dead ends: 26 [2018-12-31 10:08:02,270 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:08:02,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-12-31 10:08:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-12-31 10:08:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-31 10:08:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-12-31 10:08:02,276 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2018-12-31 10:08:02,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:02,277 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-12-31 10:08:02,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-31 10:08:02,277 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-12-31 10:08:02,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-12-31 10:08:02,278 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:02,279 INFO L402 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:02,279 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:02,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:02,279 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2018-12-31 10:08:02,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:02,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:02,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:02,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:02,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-31 10:08:02,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:02,488 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:02,512 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:08:02,609 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-12-31 10:08:02,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:02,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-12-31 10:08:02,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:02,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-12-31 10:08:02,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-31 10:08:02,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-31 10:08:02,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-12-31 10:08:02,688 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2018-12-31 10:08:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:02,911 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-12-31 10:08:02,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-31 10:08:02,912 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2018-12-31 10:08:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:02,914 INFO L225 Difference]: With dead ends: 33 [2018-12-31 10:08:02,914 INFO L226 Difference]: Without dead ends: 29 [2018-12-31 10:08:02,915 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:08:02,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-12-31 10:08:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-12-31 10:08:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-12-31 10:08:02,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-12-31 10:08:02,921 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2018-12-31 10:08:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:02,922 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-12-31 10:08:02,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-31 10:08:02,922 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-12-31 10:08:02,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-31 10:08:02,923 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:02,923 INFO L402 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:02,924 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:02,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:02,924 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2018-12-31 10:08:02,924 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:02,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:02,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:02,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:02,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-31 10:08:03,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:03,137 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:03,147 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:08:03,200 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-12-31 10:08:03,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:03,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-12-31 10:08:03,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:03,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-12-31 10:08:03,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-31 10:08:03,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-31 10:08:03,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2018-12-31 10:08:03,261 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2018-12-31 10:08:03,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:03,492 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2018-12-31 10:08:03,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-31 10:08:03,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2018-12-31 10:08:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:03,496 INFO L225 Difference]: With dead ends: 36 [2018-12-31 10:08:03,496 INFO L226 Difference]: Without dead ends: 32 [2018-12-31 10:08:03,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2018-12-31 10:08:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-12-31 10:08:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-12-31 10:08:03,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-12-31 10:08:03,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2018-12-31 10:08:03,503 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2018-12-31 10:08:03,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:03,503 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2018-12-31 10:08:03,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-31 10:08:03,504 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2018-12-31 10:08:03,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-12-31 10:08:03,505 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:03,505 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:03,506 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:03,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:03,506 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2018-12-31 10:08:03,506 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:03,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:03,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:03,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:03,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-31 10:08:03,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:03,687 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:03,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:03,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2018-12-31 10:08:03,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:03,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-12-31 10:08:03,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-31 10:08:03,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-31 10:08:03,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-12-31 10:08:03,778 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2018-12-31 10:08:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:04,250 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2018-12-31 10:08:04,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-31 10:08:04,250 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2018-12-31 10:08:04,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:04,252 INFO L225 Difference]: With dead ends: 39 [2018-12-31 10:08:04,252 INFO L226 Difference]: Without dead ends: 35 [2018-12-31 10:08:04,253 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2018-12-31 10:08:04,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-31 10:08:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-12-31 10:08:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-31 10:08:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-12-31 10:08:04,259 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2018-12-31 10:08:04,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:04,260 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-12-31 10:08:04,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-31 10:08:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-12-31 10:08:04,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-31 10:08:04,262 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:04,262 INFO L402 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:04,262 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:04,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:04,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2018-12-31 10:08:04,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:04,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:04,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:04,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:04,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-31 10:08:04,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:04,926 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:04,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:08:04,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:08:04,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:04,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-31 10:08:05,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:05,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-12-31 10:08:05,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-31 10:08:05,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-31 10:08:05,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-12-31 10:08:05,064 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2018-12-31 10:08:05,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:05,307 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2018-12-31 10:08:05,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-31 10:08:05,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2018-12-31 10:08:05,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:05,310 INFO L225 Difference]: With dead ends: 42 [2018-12-31 10:08:05,310 INFO L226 Difference]: Without dead ends: 38 [2018-12-31 10:08:05,311 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2018-12-31 10:08:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-12-31 10:08:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-12-31 10:08:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-12-31 10:08:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-12-31 10:08:05,318 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2018-12-31 10:08:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:05,318 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-12-31 10:08:05,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-31 10:08:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-12-31 10:08:05,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-12-31 10:08:05,320 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:05,320 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:05,320 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:05,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:05,321 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2018-12-31 10:08:05,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:05,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:05,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:05,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:05,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-31 10:08:05,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:05,579 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:05,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:08:05,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-12-31 10:08:05,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:05,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-12-31 10:08:05,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:05,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-12-31 10:08:05,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-31 10:08:05,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-31 10:08:05,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-12-31 10:08:05,721 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2018-12-31 10:08:05,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:05,946 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-12-31 10:08:05,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-31 10:08:05,947 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 63 [2018-12-31 10:08:05,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:05,949 INFO L225 Difference]: With dead ends: 45 [2018-12-31 10:08:05,949 INFO L226 Difference]: Without dead ends: 41 [2018-12-31 10:08:05,951 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2018-12-31 10:08:05,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-12-31 10:08:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-12-31 10:08:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-12-31 10:08:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-12-31 10:08:05,957 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2018-12-31 10:08:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:05,957 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-12-31 10:08:05,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-31 10:08:05,958 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-12-31 10:08:05,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-31 10:08:05,960 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:05,960 INFO L402 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:05,960 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:05,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2018-12-31 10:08:05,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:05,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:05,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:05,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:05,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-31 10:08:06,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:06,299 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:06,314 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:08:06,348 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:08:06,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:06,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2018-12-31 10:08:06,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:06,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-12-31 10:08:06,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-31 10:08:06,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-31 10:08:06,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2018-12-31 10:08:06,415 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-12-31 10:08:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:06,759 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2018-12-31 10:08:06,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-31 10:08:06,760 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2018-12-31 10:08:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:06,762 INFO L225 Difference]: With dead ends: 48 [2018-12-31 10:08:06,762 INFO L226 Difference]: Without dead ends: 44 [2018-12-31 10:08:06,764 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2018-12-31 10:08:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-12-31 10:08:06,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-12-31 10:08:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-12-31 10:08:06,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-12-31 10:08:06,770 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2018-12-31 10:08:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:06,772 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-12-31 10:08:06,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-31 10:08:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-12-31 10:08:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-12-31 10:08:06,774 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:06,774 INFO L402 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:06,775 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:06,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:06,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2018-12-31 10:08:06,776 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:06,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:06,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:06,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:06,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-31 10:08:07,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:07,023 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:07,034 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:08:07,106 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-12-31 10:08:07,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:07,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2018-12-31 10:08:07,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:07,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-12-31 10:08:07,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-31 10:08:07,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-31 10:08:07,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2018-12-31 10:08:07,221 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 16 states. [2018-12-31 10:08:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:07,662 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2018-12-31 10:08:07,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-31 10:08:07,665 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2018-12-31 10:08:07,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:07,666 INFO L225 Difference]: With dead ends: 51 [2018-12-31 10:08:07,667 INFO L226 Difference]: Without dead ends: 47 [2018-12-31 10:08:07,668 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2018-12-31 10:08:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-31 10:08:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-12-31 10:08:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-12-31 10:08:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-12-31 10:08:07,676 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2018-12-31 10:08:07,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:07,677 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-12-31 10:08:07,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-31 10:08:07,677 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-12-31 10:08:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-12-31 10:08:07,680 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:07,680 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:07,680 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:07,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2018-12-31 10:08:07,682 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:07,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:07,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:07,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:07,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-12-31 10:08:07,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:07,997 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:08,008 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:08:08,053 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-12-31 10:08:08,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:08,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-12-31 10:08:08,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:08,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-12-31 10:08:08,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-31 10:08:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-31 10:08:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2018-12-31 10:08:08,137 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 17 states. [2018-12-31 10:08:08,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:08,448 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2018-12-31 10:08:08,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-12-31 10:08:08,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 81 [2018-12-31 10:08:08,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:08,452 INFO L225 Difference]: With dead ends: 54 [2018-12-31 10:08:08,452 INFO L226 Difference]: Without dead ends: 50 [2018-12-31 10:08:08,453 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2018-12-31 10:08:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-12-31 10:08:08,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-12-31 10:08:08,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-12-31 10:08:08,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-12-31 10:08:08,471 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2018-12-31 10:08:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:08,474 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-12-31 10:08:08,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-31 10:08:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-12-31 10:08:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-12-31 10:08:08,475 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:08,475 INFO L402 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:08,476 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:08,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2018-12-31 10:08:08,476 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:08,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:08,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:08,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:08,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-31 10:08:09,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:09,023 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:09,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:09,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2018-12-31 10:08:09,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:09,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-12-31 10:08:09,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-12-31 10:08:09,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-12-31 10:08:09,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2018-12-31 10:08:09,135 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 18 states. [2018-12-31 10:08:09,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:09,508 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-12-31 10:08:09,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-31 10:08:09,510 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2018-12-31 10:08:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:09,512 INFO L225 Difference]: With dead ends: 57 [2018-12-31 10:08:09,512 INFO L226 Difference]: Without dead ends: 53 [2018-12-31 10:08:09,513 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2018-12-31 10:08:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-12-31 10:08:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-12-31 10:08:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-31 10:08:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-12-31 10:08:09,520 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2018-12-31 10:08:09,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:09,520 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-12-31 10:08:09,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-12-31 10:08:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-12-31 10:08:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-31 10:08:09,524 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:09,524 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:09,524 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:09,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2018-12-31 10:08:09,525 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:09,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:09,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:09,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:09,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-12-31 10:08:10,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:10,268 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:10,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:08:10,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:08:10,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:10,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2018-12-31 10:08:10,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:10,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-12-31 10:08:10,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-12-31 10:08:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-12-31 10:08:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2018-12-31 10:08:10,392 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 19 states. [2018-12-31 10:08:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:10,721 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2018-12-31 10:08:10,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-12-31 10:08:10,722 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 93 [2018-12-31 10:08:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:10,724 INFO L225 Difference]: With dead ends: 60 [2018-12-31 10:08:10,724 INFO L226 Difference]: Without dead ends: 56 [2018-12-31 10:08:10,725 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2018-12-31 10:08:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-12-31 10:08:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-12-31 10:08:10,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-12-31 10:08:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2018-12-31 10:08:10,732 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2018-12-31 10:08:10,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:10,734 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2018-12-31 10:08:10,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-12-31 10:08:10,734 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2018-12-31 10:08:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-12-31 10:08:10,737 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:10,737 INFO L402 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:10,737 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:10,738 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2018-12-31 10:08:10,738 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:10,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:10,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:10,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:10,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-12-31 10:08:11,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:11,046 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:11,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:08:11,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-12-31 10:08:11,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:11,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2018-12-31 10:08:11,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:11,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-12-31 10:08:11,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-12-31 10:08:11,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-12-31 10:08:11,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2018-12-31 10:08:11,219 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 20 states. [2018-12-31 10:08:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:11,855 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2018-12-31 10:08:11,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-12-31 10:08:11,857 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 99 [2018-12-31 10:08:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:11,858 INFO L225 Difference]: With dead ends: 63 [2018-12-31 10:08:11,859 INFO L226 Difference]: Without dead ends: 59 [2018-12-31 10:08:11,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2018-12-31 10:08:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-31 10:08:11,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-12-31 10:08:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-12-31 10:08:11,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-12-31 10:08:11,868 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2018-12-31 10:08:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:11,868 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-12-31 10:08:11,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-12-31 10:08:11,868 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-12-31 10:08:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-12-31 10:08:11,869 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:11,869 INFO L402 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:11,872 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:11,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2018-12-31 10:08:11,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:11,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:11,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:11,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:11,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-12-31 10:08:12,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:12,192 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:12,214 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:08:12,254 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:08:12,254 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:12,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2018-12-31 10:08:12,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:12,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-12-31 10:08:12,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-12-31 10:08:12,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-12-31 10:08:12,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2018-12-31 10:08:12,335 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2018-12-31 10:08:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:12,696 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2018-12-31 10:08:12,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-12-31 10:08:12,698 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2018-12-31 10:08:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:12,699 INFO L225 Difference]: With dead ends: 66 [2018-12-31 10:08:12,699 INFO L226 Difference]: Without dead ends: 62 [2018-12-31 10:08:12,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2018-12-31 10:08:12,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-12-31 10:08:12,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-12-31 10:08:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-31 10:08:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2018-12-31 10:08:12,705 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2018-12-31 10:08:12,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:12,707 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2018-12-31 10:08:12,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-12-31 10:08:12,707 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2018-12-31 10:08:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-12-31 10:08:12,708 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:12,708 INFO L402 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:12,709 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:12,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2018-12-31 10:08:12,709 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:12,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:12,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:12,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:12,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-12-31 10:08:13,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:13,312 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:13,322 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:08:13,398 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-12-31 10:08:13,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:13,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2018-12-31 10:08:13,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:13,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-12-31 10:08:13,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-12-31 10:08:13,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-12-31 10:08:13,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2018-12-31 10:08:13,462 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 22 states. [2018-12-31 10:08:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:13,817 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-12-31 10:08:13,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-12-31 10:08:13,818 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 111 [2018-12-31 10:08:13,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:13,821 INFO L225 Difference]: With dead ends: 69 [2018-12-31 10:08:13,821 INFO L226 Difference]: Without dead ends: 65 [2018-12-31 10:08:13,822 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2018-12-31 10:08:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-12-31 10:08:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-12-31 10:08:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-31 10:08:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-12-31 10:08:13,828 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2018-12-31 10:08:13,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:13,828 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-12-31 10:08:13,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-12-31 10:08:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-12-31 10:08:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-12-31 10:08:13,829 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:13,829 INFO L402 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:13,829 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:13,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:13,830 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2018-12-31 10:08:13,830 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:13,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:13,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:13,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:13,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-12-31 10:08:14,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:14,187 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:14,197 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:08:14,249 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-12-31 10:08:14,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:14,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-12-31 10:08:14,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:14,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-12-31 10:08:14,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-12-31 10:08:14,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-12-31 10:08:14,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2018-12-31 10:08:14,313 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 23 states. [2018-12-31 10:08:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:15,047 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2018-12-31 10:08:15,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-12-31 10:08:15,049 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 117 [2018-12-31 10:08:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:15,051 INFO L225 Difference]: With dead ends: 72 [2018-12-31 10:08:15,051 INFO L226 Difference]: Without dead ends: 68 [2018-12-31 10:08:15,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2018-12-31 10:08:15,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-31 10:08:15,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-12-31 10:08:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-12-31 10:08:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2018-12-31 10:08:15,056 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2018-12-31 10:08:15,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:15,056 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2018-12-31 10:08:15,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-12-31 10:08:15,056 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2018-12-31 10:08:15,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-12-31 10:08:15,064 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:15,064 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:15,065 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:15,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2018-12-31 10:08:15,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:15,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:15,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:15,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:15,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-12-31 10:08:15,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:15,421 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:15,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:15,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2018-12-31 10:08:15,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:15,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-12-31 10:08:15,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-12-31 10:08:15,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-12-31 10:08:15,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2018-12-31 10:08:15,566 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 24 states. [2018-12-31 10:08:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:16,406 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2018-12-31 10:08:16,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-31 10:08:16,407 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 123 [2018-12-31 10:08:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:16,409 INFO L225 Difference]: With dead ends: 75 [2018-12-31 10:08:16,409 INFO L226 Difference]: Without dead ends: 71 [2018-12-31 10:08:16,411 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2018-12-31 10:08:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-12-31 10:08:16,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-12-31 10:08:16,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-12-31 10:08:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-12-31 10:08:16,417 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2018-12-31 10:08:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:16,417 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-12-31 10:08:16,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-12-31 10:08:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-12-31 10:08:16,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-12-31 10:08:16,418 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:16,418 INFO L402 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:16,421 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:16,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2018-12-31 10:08:16,421 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:16,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:16,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:16,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:16,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-12-31 10:08:17,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:17,352 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:17,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-31 10:08:17,410 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-31 10:08:17,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:17,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2018-12-31 10:08:17,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:17,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-12-31 10:08:17,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-31 10:08:17,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-31 10:08:17,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2018-12-31 10:08:17,500 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 25 states. [2018-12-31 10:08:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:17,915 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2018-12-31 10:08:17,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-12-31 10:08:17,917 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 129 [2018-12-31 10:08:17,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:17,919 INFO L225 Difference]: With dead ends: 78 [2018-12-31 10:08:17,919 INFO L226 Difference]: Without dead ends: 74 [2018-12-31 10:08:17,922 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2018-12-31 10:08:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-12-31 10:08:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-12-31 10:08:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-31 10:08:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2018-12-31 10:08:17,927 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2018-12-31 10:08:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:17,927 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2018-12-31 10:08:17,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-31 10:08:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2018-12-31 10:08:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-12-31 10:08:17,928 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:17,929 INFO L402 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:17,929 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2018-12-31 10:08:17,929 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:17,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:17,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:17,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:17,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-12-31 10:08:18,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:18,970 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:18,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-31 10:08:19,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-12-31 10:08:19,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:19,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2018-12-31 10:08:19,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:19,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-12-31 10:08:19,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-12-31 10:08:19,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-12-31 10:08:19,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2018-12-31 10:08:19,173 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 26 states. [2018-12-31 10:08:19,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:19,606 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-12-31 10:08:19,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-12-31 10:08:19,609 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 135 [2018-12-31 10:08:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:19,610 INFO L225 Difference]: With dead ends: 81 [2018-12-31 10:08:19,610 INFO L226 Difference]: Without dead ends: 77 [2018-12-31 10:08:19,613 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2018-12-31 10:08:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-12-31 10:08:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-12-31 10:08:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-12-31 10:08:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-12-31 10:08:19,620 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 135 [2018-12-31 10:08:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:19,620 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-12-31 10:08:19,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-12-31 10:08:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-12-31 10:08:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-12-31 10:08:19,622 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:19,622 INFO L402 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:19,622 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:19,622 INFO L82 PathProgramCache]: Analyzing trace with hash -555819607, now seen corresponding path program 22 times [2018-12-31 10:08:19,622 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:19,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:19,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:19,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:19,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-12-31 10:08:19,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:19,986 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:19,996 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-31 10:08:20,051 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-31 10:08:20,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:20,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2018-12-31 10:08:20,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:20,121 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-12-31 10:08:20,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-12-31 10:08:20,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-12-31 10:08:20,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2018-12-31 10:08:20,122 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 27 states. [2018-12-31 10:08:20,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:20,648 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2018-12-31 10:08:20,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-12-31 10:08:20,649 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 141 [2018-12-31 10:08:20,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:20,650 INFO L225 Difference]: With dead ends: 84 [2018-12-31 10:08:20,650 INFO L226 Difference]: Without dead ends: 80 [2018-12-31 10:08:20,651 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2018-12-31 10:08:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-31 10:08:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-12-31 10:08:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-12-31 10:08:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-12-31 10:08:20,657 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 141 [2018-12-31 10:08:20,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:20,658 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-12-31 10:08:20,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-12-31 10:08:20,658 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-12-31 10:08:20,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-12-31 10:08:20,659 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:20,659 INFO L402 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:20,659 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:20,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:20,659 INFO L82 PathProgramCache]: Analyzing trace with hash -945685357, now seen corresponding path program 23 times [2018-12-31 10:08:20,663 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:20,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:20,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:20,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:20,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-12-31 10:08:21,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:21,060 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:21,073 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-31 10:08:21,155 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-12-31 10:08:21,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:21,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2018-12-31 10:08:21,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:21,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-12-31 10:08:21,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-12-31 10:08:21,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-12-31 10:08:21,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2018-12-31 10:08:21,238 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 28 states. [2018-12-31 10:08:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:22,087 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2018-12-31 10:08:22,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-12-31 10:08:22,088 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 147 [2018-12-31 10:08:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:22,090 INFO L225 Difference]: With dead ends: 87 [2018-12-31 10:08:22,090 INFO L226 Difference]: Without dead ends: 83 [2018-12-31 10:08:22,091 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2018-12-31 10:08:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-12-31 10:08:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-12-31 10:08:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-12-31 10:08:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-12-31 10:08:22,095 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 147 [2018-12-31 10:08:22,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:22,096 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-12-31 10:08:22,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-12-31 10:08:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-12-31 10:08:22,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-12-31 10:08:22,098 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:22,098 INFO L402 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:22,098 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:22,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:22,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1588806697, now seen corresponding path program 24 times [2018-12-31 10:08:22,099 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:22,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:22,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:22,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:22,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-12-31 10:08:22,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:22,706 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:22,717 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-31 10:08:22,790 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-12-31 10:08:22,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-31 10:08:22,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-12-31 10:08:22,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:22,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-12-31 10:08:22,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-12-31 10:08:22,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-12-31 10:08:22,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2018-12-31 10:08:22,865 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 29 states. [2018-12-31 10:08:23,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:23,428 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2018-12-31 10:08:23,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-12-31 10:08:23,429 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 153 [2018-12-31 10:08:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:23,430 INFO L225 Difference]: With dead ends: 90 [2018-12-31 10:08:23,430 INFO L226 Difference]: Without dead ends: 86 [2018-12-31 10:08:23,431 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2018-12-31 10:08:23,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-12-31 10:08:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-12-31 10:08:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-12-31 10:08:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2018-12-31 10:08:23,437 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 153 [2018-12-31 10:08:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:23,437 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2018-12-31 10:08:23,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-12-31 10:08:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2018-12-31 10:08:23,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-12-31 10:08:23,440 INFO L394 BasicCegarLoop]: Found error trace [2018-12-31 10:08:23,440 INFO L402 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-12-31 10:08:23,441 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-31 10:08:23,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2018-12-31 10:08:23,441 INFO L82 PathProgramCache]: Analyzing trace with hash 959677331, now seen corresponding path program 25 times [2018-12-31 10:08:23,441 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-31 10:08:23,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-31 10:08:23,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:23,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-31 10:08:23,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-31 10:08:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 999 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-12-31 10:08:26,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-31 10:08:26,030 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-31 10:08:26,040 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-31 10:08:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-31 10:08:26,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-31 10:08:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 949 proven. 50 refuted. 0 times theorem prover too weak. 901 trivial. 0 not checked. [2018-12-31 10:08:34,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-31 10:08:34,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 116 [2018-12-31 10:08:34,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-12-31 10:08:34,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-12-31 10:08:34,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=843, Invalid=12497, Unknown=0, NotChecked=0, Total=13340 [2018-12-31 10:08:34,140 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand 116 states. [2018-12-31 10:08:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-31 10:08:41,495 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-12-31 10:08:41,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-12-31 10:08:41,502 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 159 [2018-12-31 10:08:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-31 10:08:41,503 INFO L225 Difference]: With dead ends: 89 [2018-12-31 10:08:41,503 INFO L226 Difference]: Without dead ends: 0 [2018-12-31 10:08:41,513 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4275 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=2079, Invalid=26651, Unknown=0, NotChecked=0, Total=28730 [2018-12-31 10:08:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-31 10:08:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-31 10:08:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-31 10:08:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-31 10:08:41,514 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 159 [2018-12-31 10:08:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-31 10:08:41,514 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-31 10:08:41,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-12-31 10:08:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-31 10:08:41,514 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-31 10:08:41,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-31 10:08:41,548 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-31 10:08:41,548 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-12-31 10:08:41,548 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-31 10:08:41,549 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2018-12-31 10:08:41,549 INFO L448 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-12-31 10:08:41,549 INFO L448 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-12-31 10:08:41,549 INFO L444 ceAbstractionStarter]: At program point L14(line 14) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 25) (<= 25 ULTIMATE.start_main_~a~0)) [2018-12-31 10:08:41,549 INFO L448 ceAbstractionStarter]: For program point L14-1(line 14) no Hoare annotation was computed. [2018-12-31 10:08:41,549 INFO L448 ceAbstractionStarter]: For program point L11(lines 11 18) no Hoare annotation was computed. [2018-12-31 10:08:41,549 INFO L448 ceAbstractionStarter]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2018-12-31 10:08:41,550 INFO L444 ceAbstractionStarter]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (< 0 sum_~n)) [2018-12-31 10:08:41,550 INFO L448 ceAbstractionStarter]: For program point L7-1(line 7) no Hoare annotation was computed. [2018-12-31 10:08:41,550 INFO L448 ceAbstractionStarter]: For program point L4(lines 4 8) no Hoare annotation was computed. [2018-12-31 10:08:41,550 INFO L448 ceAbstractionStarter]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2018-12-31 10:08:41,550 INFO L451 ceAbstractionStarter]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2018-12-31 10:08:41,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.12 10:08:41 BoogieIcfgContainer [2018-12-31 10:08:41,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-31 10:08:41,554 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-31 10:08:41,554 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-31 10:08:41,554 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-31 10:08:41,555 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.12 10:07:58" (3/4) ... [2018-12-31 10:08:41,560 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-31 10:08:41,569 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2018-12-31 10:08:41,575 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-31 10:08:41,575 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-31 10:08:41,627 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2018-12-31 10:08:41,627 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-31 10:08:41,628 INFO L168 Benchmark]: Toolchain (without parser) took 43583.20 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 480.8 MB). Free memory was 946.0 MB in the beginning and 1.2 GB in the end (delta: -273.3 MB). Peak memory consumption was 207.4 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:41,631 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:41,631 INFO L168 Benchmark]: CACSL2BoogieTranslator took 347.30 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:41,632 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.97 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:41,632 INFO L168 Benchmark]: Boogie Preprocessor took 23.00 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-31 10:08:41,633 INFO L168 Benchmark]: RCFGBuilder took 383.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -199.7 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:41,633 INFO L168 Benchmark]: TraceAbstraction took 42703.84 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 330.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -84.7 MB). Peak memory consumption was 245.6 MB. Max. memory is 11.5 GB. [2018-12-31 10:08:41,634 INFO L168 Benchmark]: Witness Printer took 73.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 327.8 kB). Peak memory consumption was 327.8 kB. Max. memory is 11.5 GB. [2018-12-31 10:08:41,639 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 347.30 ms. Allocated memory is still 1.0 GB. Free memory was 946.0 MB in the beginning and 935.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 45.97 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.00 ms. Allocated memory is still 1.0 GB. Free memory is still 935.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 383.07 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 935.3 MB in the beginning and 1.1 GB in the end (delta: -199.7 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 42703.84 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 330.3 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -84.7 MB). Peak memory consumption was 245.6 MB. Max. memory is 11.5 GB. * Witness Printer took 73.06 ms. Allocated memory is still 1.5 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 327.8 kB). Peak memory consumption was 327.8 kB. 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. SAFE Result, 42.6s OverallTime, 26 OverallIterations, 26 TraceHistogramMax, 17.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 232 SDtfs, 917 SDslu, 3188 SDs, 0 SdLazy, 5651 SolverSat, 325 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3337 GetRequests, 2469 SyntacticMatches, 0 SemanticMatches, 868 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6875 ImplicationChecksByTransitivity, 29.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 26 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 21.0s InterpolantComputationTime, 4359 NumberOfCodeBlocks, 4359 NumberOfCodeBlocksAsserted, 223 NumberOfCheckSat, 4308 ConstructedInterpolants, 0 QuantifiedInterpolants, 1478368 SizeOfPredicates, 403 NumberOfNonLiveVariables, 6550 ConjunctsInSsa, 963 ConjunctsInUnsatCore, 51 InterpolantComputations, 1 PerfectInterpolantSequences, 17751/33800 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...