java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:19:48,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:19:48,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:19:48,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 19:19:48,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 19:19:48,274 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 19:19:48,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 19:19:48,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 19:19:48,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 19:19:48,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 19:19:48,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 19:19:48,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 19:19:48,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:19:48,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:19:48,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:19:48,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:19:48,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:19:48,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:19:48,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:19:48,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:19:48,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:19:48,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:19:48,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:19:48,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:19:48,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 19:19:48,304 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 19:19:48,305 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 19:19:48,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 19:19:48,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 19:19:48,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 19:19:48,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 19:19:48,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 19:19:48,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 19:19:48,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:19:48,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:19:48,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:19:48,312 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-03 19:19:48,328 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:19:48,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:19:48,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:19:48,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:19:48,330 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:19:48,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:19:48,330 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:19:48,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:19:48,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:19:48,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:19:48,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:19:48,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:19:48,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:19:48,332 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:19:48,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:19:48,332 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:19:48,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:19:48,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:19:48,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:19:48,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:19:48,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:19:48,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:19:48,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:19:48,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:19:48,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:19:48,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:19:48,334 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:19:48,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:19:48,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:19:48,375 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:19:48,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:19:48,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:19:48,394 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:19:48,394 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:19:48,395 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2019-09-03 19:19:48,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0be5e59/7a83d6c5f747414faae0a890eb6e9380/FLAGd5e4eabe6 [2019-09-03 19:19:48,933 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:19:48,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2019-09-03 19:19:48,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0be5e59/7a83d6c5f747414faae0a890eb6e9380/FLAGd5e4eabe6 [2019-09-03 19:19:49,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f0be5e59/7a83d6c5f747414faae0a890eb6e9380 [2019-09-03 19:19:49,297 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:19:49,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:19:49,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:19:49,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:19:49,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:19:49,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:19:49" (1/1) ... [2019-09-03 19:19:49,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c29d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:49, skipping insertion in model container [2019-09-03 19:19:49,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:19:49" (1/1) ... [2019-09-03 19:19:49,315 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:19:49,330 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:19:49,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:19:49,503 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:19:49,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:19:49,544 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:19:49,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:49 WrapperNode [2019-09-03 19:19:49,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:19:49,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:19:49,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:19:49,545 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:19:49,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:49" (1/1) ... [2019-09-03 19:19:49,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:49" (1/1) ... [2019-09-03 19:19:49,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:49" (1/1) ... [2019-09-03 19:19:49,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:49" (1/1) ... [2019-09-03 19:19:49,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:49" (1/1) ... [2019-09-03 19:19:49,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:49" (1/1) ... [2019-09-03 19:19:49,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:49" (1/1) ... [2019-09-03 19:19:49,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:19:49,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:19:49,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:19:49,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:19:49,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:19:49,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:19:49,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:19:49,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 19:19:49,735 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-09-03 19:19:49,735 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:19:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:19:49,735 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-03 19:19:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 19:19:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-03 19:19:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-09-03 19:19:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-03 19:19:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:19:49,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-03 19:19:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-03 19:19:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:19:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:19:49,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-03 19:19:49,985 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:19:49,985 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 19:19:49,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:19:49 BoogieIcfgContainer [2019-09-03 19:19:49,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:19:49,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:19:49,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:19:50,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:19:50,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:19:49" (1/3) ... [2019-09-03 19:19:50,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a95374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:19:50, skipping insertion in model container [2019-09-03 19:19:50,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:49" (2/3) ... [2019-09-03 19:19:50,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a95374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:19:50, skipping insertion in model container [2019-09-03 19:19:50,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:19:49" (3/3) ... [2019-09-03 19:19:50,013 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2019-09-03 19:19:50,029 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:19:50,037 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:19:50,067 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:19:50,096 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:19:50,097 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:19:50,097 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:19:50,097 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:19:50,097 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:19:50,097 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:19:50,097 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:19:50,097 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:19:50,098 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:19:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-09-03 19:19:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-03 19:19:50,128 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:50,128 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:50,130 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:50,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:50,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1860043698, now seen corresponding path program 1 times [2019-09-03 19:19:50,137 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:50,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:50,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:50,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:50,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:50,300 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:19:50,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 19:19:50,303 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 19:19:50,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 19:19:50,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:19:50,316 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-09-03 19:19:50,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:50,340 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-09-03 19:19:50,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 19:19:50,342 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-09-03 19:19:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:50,350 INFO L225 Difference]: With dead ends: 44 [2019-09-03 19:19:50,350 INFO L226 Difference]: Without dead ends: 21 [2019-09-03 19:19:50,354 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:19:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-03 19:19:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-03 19:19:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-03 19:19:50,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-09-03 19:19:50,396 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-09-03 19:19:50,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:50,397 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-09-03 19:19:50,398 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 19:19:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-09-03 19:19:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 19:19:50,401 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:50,401 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:50,402 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:50,403 INFO L82 PathProgramCache]: Analyzing trace with hash 916881159, now seen corresponding path program 1 times [2019-09-03 19:19:50,403 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:50,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:50,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:50,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:50,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:50,653 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:19:50,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-03 19:19:50,659 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 19:19:50,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 19:19:50,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:19:50,660 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2019-09-03 19:19:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:50,723 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-09-03 19:19:50,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 19:19:50,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-09-03 19:19:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:50,725 INFO L225 Difference]: With dead ends: 29 [2019-09-03 19:19:50,725 INFO L226 Difference]: Without dead ends: 21 [2019-09-03 19:19:50,726 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:50,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-03 19:19:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-03 19:19:50,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-03 19:19:50,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-03 19:19:50,733 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2019-09-03 19:19:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:50,733 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-03 19:19:50,733 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 19:19:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-03 19:19:50,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 19:19:50,735 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:50,735 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:50,735 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:50,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:50,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1635275802, now seen corresponding path program 1 times [2019-09-03 19:19:50,736 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:50,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:50,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:50,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:50,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:50,909 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:19:50,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 19:19:50,909 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 19:19:50,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 19:19:50,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 19:19:50,911 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2019-09-03 19:19:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:50,981 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-09-03 19:19:50,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 19:19:50,982 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-03 19:19:50,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:50,983 INFO L225 Difference]: With dead ends: 33 [2019-09-03 19:19:50,983 INFO L226 Difference]: Without dead ends: 24 [2019-09-03 19:19:50,984 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:19:50,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-03 19:19:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-03 19:19:50,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 19:19:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-03 19:19:50,991 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2019-09-03 19:19:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:50,991 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-03 19:19:50,991 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 19:19:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-03 19:19:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-03 19:19:50,992 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:50,993 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:50,993 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:50,993 INFO L82 PathProgramCache]: Analyzing trace with hash 636491705, now seen corresponding path program 1 times [2019-09-03 19:19:50,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:50,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:50,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:50,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:50,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 19:19:51,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:51,265 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 [2019-09-03 19:19:51,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:51,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 19:19:51,343 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:51,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:19:51,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-09-03 19:19:51,513 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 19:19:51,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 19:19:51,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-09-03 19:19:51,514 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 11 states. [2019-09-03 19:19:52,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:52,190 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-03 19:19:52,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 19:19:52,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2019-09-03 19:19:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:52,194 INFO L225 Difference]: With dead ends: 43 [2019-09-03 19:19:52,194 INFO L226 Difference]: Without dead ends: 30 [2019-09-03 19:19:52,195 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-09-03 19:19:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-03 19:19:52,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-09-03 19:19:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-03 19:19:52,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-09-03 19:19:52,208 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2019-09-03 19:19:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:52,209 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-09-03 19:19:52,209 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 19:19:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-09-03 19:19:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-03 19:19:52,211 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:52,211 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:52,212 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:52,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1625384636, now seen corresponding path program 1 times [2019-09-03 19:19:52,212 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:52,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:52,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:52,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:52,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:52,825 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 39 [2019-09-03 19:19:53,584 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2019-09-03 19:19:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:53,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:19:53,594 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 [2019-09-03 19:19:53,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:53,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-03 19:19:53,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:19:53,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:01,161 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 30 DAG size of output: 13 [2019-09-03 19:20:01,220 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2019-09-03 19:20:01,220 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-03 19:20:01,229 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-03 19:20:01,230 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 1 [2019-09-03 19:20:01,231 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-03 19:20:03,302 WARN L188 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 64 DAG size of output: 25 [2019-09-03 19:20:03,303 INFO L567 ElimStorePlain]: treesize reduction 268, result has 10.7 percent of original size [2019-09-03 19:20:03,303 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-09-03 19:20:03,303 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-09-03 19:20:03,304 INFO L464 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2019-09-03 19:20:03,304 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-03 19:20:03,305 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:359, output treesize:32 [2019-09-03 19:20:08,647 WARN L188 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 47 [2019-09-03 19:20:08,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:08,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:08,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:08,655 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:08,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:12,003 WARN L188 SmtUtils]: Spent 3.24 s on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2019-09-03 19:20:12,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:14,297 WARN L188 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2019-09-03 19:20:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:20:14,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:20:14,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-09-03 19:20:14,396 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 19:20:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 19:20:14,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=396, Unknown=2, NotChecked=0, Total=462 [2019-09-03 19:20:14,399 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 22 states. [2019-09-03 19:20:15,190 WARN L188 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2019-09-03 19:20:15,529 WARN L188 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-09-03 19:20:16,096 WARN L188 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2019-09-03 19:20:23,731 WARN L188 SmtUtils]: Spent 7.51 s on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2019-09-03 19:20:30,047 WARN L188 SmtUtils]: Spent 6.23 s on a formula simplification. DAG size of input: 100 DAG size of output: 62 [2019-09-03 19:20:35,344 WARN L188 SmtUtils]: Spent 3.39 s on a formula simplification. DAG size of input: 125 DAG size of output: 88 [2019-09-03 19:20:35,794 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2019-09-03 19:20:37,971 WARN L188 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2019-09-03 19:20:38,239 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2019-09-03 19:20:39,064 WARN L188 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2019-09-03 19:20:41,903 WARN L188 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2019-09-03 19:20:42,333 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2019-09-03 19:20:42,538 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2019-09-03 19:20:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:20:42,677 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2019-09-03 19:20:42,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 19:20:42,679 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2019-09-03 19:20:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:20:42,680 INFO L225 Difference]: With dead ends: 63 [2019-09-03 19:20:42,681 INFO L226 Difference]: Without dead ends: 31 [2019-09-03 19:20:42,682 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=273, Invalid=1284, Unknown=3, NotChecked=0, Total=1560 [2019-09-03 19:20:42,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-03 19:20:42,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-03 19:20:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-03 19:20:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-09-03 19:20:42,688 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2019-09-03 19:20:42,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:20:42,689 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-09-03 19:20:42,689 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 19:20:42,689 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-09-03 19:20:42,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-03 19:20:42,690 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:20:42,690 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:20:42,690 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:20:42,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:20:42,691 INFO L82 PathProgramCache]: Analyzing trace with hash -854746409, now seen corresponding path program 2 times [2019-09-03 19:20:42,691 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:20:42,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:20:42,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:42,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:20:42,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:20:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:20:47,157 WARN L188 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 243 DAG size of output: 36 [2019-09-03 19:20:47,594 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2019-09-03 19:20:48,358 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 37 [2019-09-03 19:20:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:20:48,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:20:48,365 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 [2019-09-03 19:20:48,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:20:48,508 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:20:48,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:20:48,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-03 19:20:48,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:20:48,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:20:50,632 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-03 19:20:50,632 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-03 19:20:52,692 WARN L188 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 59 DAG size of output: 26 [2019-09-03 19:20:52,692 INFO L567 ElimStorePlain]: treesize reduction 238, result has 11.5 percent of original size [2019-09-03 19:20:52,693 INFO L464 ElimStorePlain]: Eliminatee v_prenex_9 vanished before elimination [2019-09-03 19:20:52,697 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-09-03 19:20:52,697 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-03 19:20:52,705 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-03 19:20:52,706 INFO L464 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2019-09-03 19:20:52,707 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-03 19:20:52,707 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:329, output treesize:27 [2019-09-03 19:20:54,672 WARN L188 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 49 [2019-09-03 19:21:01,748 WARN L188 SmtUtils]: Spent 5.93 s on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-09-03 19:21:03,083 WARN L188 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2019-09-03 19:21:03,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:21:03,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:21:03,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:21:03,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:21:03,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:21:05,444 WARN L188 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2019-09-03 19:21:06,022 WARN L188 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-09-03 19:21:08,896 WARN L188 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2019-09-03 19:21:09,558 WARN L188 SmtUtils]: Spent 593.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2019-09-03 19:21:10,232 WARN L188 SmtUtils]: Spent 596.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2019-09-03 19:21:14,819 WARN L188 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2019-09-03 19:21:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:21:15,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:21:15,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 30 [2019-09-03 19:21:15,097 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 19:21:15,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 19:21:15,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=754, Unknown=1, NotChecked=0, Total=870 [2019-09-03 19:21:15,098 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 30 states. [2019-09-03 19:21:16,701 WARN L188 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2019-09-03 19:21:17,106 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2019-09-03 19:21:17,306 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2019-09-03 19:21:21,439 WARN L188 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 103 DAG size of output: 62 [2019-09-03 19:21:21,780 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 53 [2019-09-03 19:21:22,906 WARN L188 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 66 [2019-09-03 19:21:26,349 WARN L188 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 116 DAG size of output: 70 [2019-09-03 19:21:28,687 WARN L188 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 90 DAG size of output: 86 [2019-09-03 19:21:32,489 WARN L188 SmtUtils]: Spent 3.62 s on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2019-09-03 19:21:32,720 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2019-09-03 19:21:37,328 WARN L188 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2019-09-03 19:21:41,078 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 68 [2019-09-03 19:21:41,274 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2019-09-03 19:21:41,449 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2019-09-03 19:21:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:21:41,576 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2019-09-03 19:21:41,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 19:21:41,577 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2019-09-03 19:21:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:21:41,578 INFO L225 Difference]: With dead ends: 64 [2019-09-03 19:21:41,578 INFO L226 Difference]: Without dead ends: 34 [2019-09-03 19:21:41,581 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=360, Invalid=2189, Unknown=1, NotChecked=0, Total=2550 [2019-09-03 19:21:41,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-03 19:21:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-03 19:21:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-03 19:21:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-09-03 19:21:41,591 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2019-09-03 19:21:41,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:21:41,592 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-09-03 19:21:41,592 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 19:21:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-09-03 19:21:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-03 19:21:41,593 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:21:41,593 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:21:41,593 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:21:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:21:41,594 INFO L82 PathProgramCache]: Analyzing trace with hash 628477028, now seen corresponding path program 3 times [2019-09-03 19:21:41,594 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:21:41,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:21:41,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:41,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:21:41,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:21:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:21:46,075 WARN L188 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 225 DAG size of output: 36 [2019-09-03 19:21:46,536 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 43 [2019-09-03 19:21:46,667 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2019-09-03 19:21:46,809 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2019-09-03 19:21:47,541 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 46 [2019-09-03 19:21:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:21:47,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:21:47,551 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 [2019-09-03 19:21:47,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:21:51,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 19:21:51,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:21:51,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 54 conjunts are in the unsatisfiable core [2019-09-03 19:21:51,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:21:51,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:21:51,175 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-03 19:21:51,176 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-03 19:21:51,183 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-09-03 19:21:51,183 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-03 19:21:55,270 WARN L188 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2019-09-03 19:21:55,271 INFO L567 ElimStorePlain]: treesize reduction 232, result has 15.9 percent of original size [2019-09-03 19:21:55,275 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2019-09-03 19:21:55,275 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-09-03 19:21:55,289 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-03 19:21:55,289 INFO L464 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2019-09-03 19:21:55,289 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_8| vanished before elimination [2019-09-03 19:21:55,289 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-03 19:21:55,290 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:407, output treesize:40 [2019-09-03 19:21:57,458 WARN L188 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 27 [2019-09-03 19:21:58,394 WARN L188 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-09-03 19:22:00,941 WARN L188 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-09-03 19:22:02,551 WARN L188 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2019-09-03 19:22:02,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:22:02,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:22:02,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:22:02,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:22:02,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:22:07,035 WARN L188 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2019-09-03 19:22:08,359 WARN L188 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2019-09-03 19:22:10,545 WARN L188 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 54 [2019-09-03 19:22:10,805 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-09-03 19:22:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:22:10,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:22:10,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2019-09-03 19:22:10,832 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-03 19:22:10,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-03 19:22:10,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2019-09-03 19:22:10,833 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 32 states. [2019-09-03 19:22:13,268 WARN L188 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-09-03 19:22:14,563 WARN L188 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2019-09-03 19:22:14,859 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2019-09-03 19:22:15,613 WARN L188 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2019-09-03 19:22:15,815 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2019-09-03 19:22:16,238 WARN L188 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2019-09-03 19:22:16,553 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 70 [2019-09-03 19:22:17,381 WARN L188 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2019-09-03 19:22:17,685 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2019-09-03 19:22:18,619 WARN L188 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 98 [2019-09-03 19:22:19,105 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 77 [2019-09-03 19:22:21,447 WARN L188 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 140 DAG size of output: 72 [2019-09-03 19:22:22,251 WARN L188 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 70 [2019-09-03 19:22:22,468 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 65 [2019-09-03 19:22:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:22:22,566 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-09-03 19:22:22,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-03 19:22:22,570 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2019-09-03 19:22:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:22:22,571 INFO L225 Difference]: With dead ends: 54 [2019-09-03 19:22:22,571 INFO L226 Difference]: Without dead ends: 37 [2019-09-03 19:22:22,573 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=283, Invalid=2069, Unknown=0, NotChecked=0, Total=2352 [2019-09-03 19:22:22,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-03 19:22:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-09-03 19:22:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-03 19:22:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-09-03 19:22:22,579 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2019-09-03 19:22:22,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:22:22,580 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-09-03 19:22:22,580 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-03 19:22:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-09-03 19:22:22,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-03 19:22:22,581 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:22:22,581 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:22:22,581 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:22:22,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:22:22,582 INFO L82 PathProgramCache]: Analyzing trace with hash 714347447, now seen corresponding path program 4 times [2019-09-03 19:22:22,582 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:22:22,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:22:22,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:22,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:22:22,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:22:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:22:22,715 ERROR L253 erpolLogProxyWrapper]: Interpolant 17 not inductive: (Check returned sat) [2019-09-03 19:22:22,821 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:969) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:168) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:453) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-09-03 19:22:22,826 INFO L168 Benchmark]: Toolchain (without parser) took 153527.96 ms. Allocated memory was 140.5 MB in the beginning and 318.2 MB in the end (delta: 177.7 MB). Free memory was 88.1 MB in the beginning and 151.9 MB in the end (delta: -63.8 MB). Peak memory consumption was 113.9 MB. Max. memory is 7.1 GB. [2019-09-03 19:22:22,828 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 106.5 MB in the beginning and 106.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 19:22:22,835 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.25 ms. Allocated memory is still 140.5 MB. Free memory was 87.9 MB in the beginning and 78.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-09-03 19:22:22,836 INFO L168 Benchmark]: Boogie Preprocessor took 131.30 ms. Allocated memory was 140.5 MB in the beginning and 199.2 MB in the end (delta: 58.7 MB). Free memory was 78.0 MB in the beginning and 176.2 MB in the end (delta: -98.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-09-03 19:22:22,837 INFO L168 Benchmark]: RCFGBuilder took 310.26 ms. Allocated memory is still 199.2 MB. Free memory was 176.2 MB in the beginning and 160.9 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2019-09-03 19:22:22,838 INFO L168 Benchmark]: TraceAbstraction took 152826.51 ms. Allocated memory was 199.2 MB in the beginning and 318.2 MB in the end (delta: 119.0 MB). Free memory was 160.9 MB in the beginning and 151.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. [2019-09-03 19:22:22,848 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 106.5 MB in the beginning and 106.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.25 ms. Allocated memory is still 140.5 MB. Free memory was 87.9 MB in the beginning and 78.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.30 ms. Allocated memory was 140.5 MB in the beginning and 199.2 MB in the end (delta: 58.7 MB). Free memory was 78.0 MB in the beginning and 176.2 MB in the end (delta: -98.2 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 310.26 ms. Allocated memory is still 199.2 MB. Free memory was 176.2 MB in the beginning and 160.9 MB in the end (delta: 15.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 152826.51 ms. Allocated memory was 199.2 MB in the beginning and 318.2 MB in the end (delta: 119.0 MB). Free memory was 160.9 MB in the beginning and 151.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 128.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:969) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...