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/array-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 16:14:40,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 16:14:40,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 16:14:40,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 16:14:40,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 16:14:40,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 16:14:40,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 16:14:40,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 16:14:40,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 16:14:40,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 16:14:40,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 16:14:40,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 16:14:40,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 16:14:40,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 16:14:40,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 16:14:40,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 16:14:40,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 16:14:40,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 16:14:40,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 16:14:40,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 16:14:40,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 16:14:40,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 16:14:40,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 16:14:40,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 16:14:40,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 16:14:40,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 16:14:40,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 16:14:40,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 16:14:40,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 16:14:40,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 16:14:40,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 16:14:40,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 16:14:40,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 16:14:40,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 16:14:40,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 16:14:40,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 16:14:40,343 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 [2019-09-16 16:14:40,360 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 16:14:40,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 16:14:40,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-16 16:14:40,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-16 16:14:40,363 INFO L138 SettingsManager]: * Use SBE=true [2019-09-16 16:14:40,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 16:14:40,364 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 16:14:40,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-16 16:14:40,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 16:14:40,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 16:14:40,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 16:14:40,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 16:14:40,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 16:14:40,365 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 16:14:40,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 16:14:40,365 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-16 16:14:40,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 16:14:40,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 16:14:40,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 16:14:40,367 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-16 16:14:40,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-16 16:14:40,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:14:40,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 16:14:40,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 16:14:40,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-16 16:14:40,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-16 16:14:40,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 16:14:40,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-16 16:14:40,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 16:14:40,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 16:14:40,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 16:14:40,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 16:14:40,424 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 16:14:40,425 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 16:14:40,429 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2019-09-16 16:14:40,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24eecdda/0af5e2b5168f469aa5ffcaa7f88713cf/FLAGf3a7268ae [2019-09-16 16:14:40,972 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 16:14:40,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-2.i [2019-09-16 16:14:40,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24eecdda/0af5e2b5168f469aa5ffcaa7f88713cf/FLAGf3a7268ae [2019-09-16 16:14:41,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24eecdda/0af5e2b5168f469aa5ffcaa7f88713cf [2019-09-16 16:14:41,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 16:14:41,339 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 16:14:41,340 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 16:14:41,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 16:14:41,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 16:14:41,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:14:41" (1/1) ... [2019-09-16 16:14:41,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f0863b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41, skipping insertion in model container [2019-09-16 16:14:41,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:14:41" (1/1) ... [2019-09-16 16:14:41,353 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 16:14:41,368 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 16:14:41,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:14:41,533 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 16:14:41,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:14:41,571 INFO L192 MainTranslator]: Completed translation [2019-09-16 16:14:41,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41 WrapperNode [2019-09-16 16:14:41,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 16:14:41,572 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 16:14:41,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 16:14:41,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 16:14:41,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41" (1/1) ... [2019-09-16 16:14:41,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41" (1/1) ... [2019-09-16 16:14:41,675 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41" (1/1) ... [2019-09-16 16:14:41,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41" (1/1) ... [2019-09-16 16:14:41,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41" (1/1) ... [2019-09-16 16:14:41,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41" (1/1) ... [2019-09-16 16:14:41,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41" (1/1) ... [2019-09-16 16:14:41,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 16:14:41,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 16:14:41,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 16:14:41,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 16:14:41,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41" (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 [2019-09-16 16:14:41,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 16:14:41,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 16:14:41,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 16:14:41,748 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 16:14:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 16:14:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 16:14:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-16 16:14:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 16:14:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 16:14:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 16:14:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 16:14:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 16:14:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 16:14:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 16:14:42,022 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 16:14:42,022 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-16 16:14:42,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:14:42 BoogieIcfgContainer [2019-09-16 16:14:42,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 16:14:42,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 16:14:42,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 16:14:42,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 16:14:42,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 04:14:41" (1/3) ... [2019-09-16 16:14:42,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ea0a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:14:42, skipping insertion in model container [2019-09-16 16:14:42,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41" (2/3) ... [2019-09-16 16:14:42,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ea0a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:14:42, skipping insertion in model container [2019-09-16 16:14:42,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:14:42" (3/3) ... [2019-09-16 16:14:42,031 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2019-09-16 16:14:42,039 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 16:14:42,045 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 16:14:42,060 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 16:14:42,083 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-16 16:14:42,084 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 16:14:42,084 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-16 16:14:42,084 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 16:14:42,084 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 16:14:42,085 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 16:14:42,085 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 16:14:42,085 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 16:14:42,085 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 16:14:42,100 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-16 16:14:42,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 16:14:42,105 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:42,106 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:42,108 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:42,113 INFO L82 PathProgramCache]: Analyzing trace with hash -908266250, now seen corresponding path program 1 times [2019-09-16 16:14:42,114 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:42,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:42,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:42,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:14:42,255 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:42,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 16:14:42,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 16:14:42,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 16:14:42,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:14:42,270 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-16 16:14:42,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:42,289 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2019-09-16 16:14:42,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 16:14:42,290 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-16 16:14:42,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:42,296 INFO L225 Difference]: With dead ends: 50 [2019-09-16 16:14:42,297 INFO L226 Difference]: Without dead ends: 24 [2019-09-16 16:14:42,300 INFO L636 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 [2019-09-16 16:14:42,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-16 16:14:42,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-16 16:14:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-16 16:14:42,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-16 16:14:42,330 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-09-16 16:14:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:42,331 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-16 16:14:42,331 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 16:14:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-16 16:14:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 16:14:42,332 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:42,332 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:42,332 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:42,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1720229721, now seen corresponding path program 1 times [2019-09-16 16:14:42,333 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:42,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:42,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:42,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:14:42,385 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:42,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 16:14:42,387 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 16:14:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 16:14:42,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:14:42,388 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-09-16 16:14:42,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:42,458 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2019-09-16 16:14:42,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 16:14:42,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-16 16:14:42,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:42,461 INFO L225 Difference]: With dead ends: 45 [2019-09-16 16:14:42,461 INFO L226 Difference]: Without dead ends: 29 [2019-09-16 16:14:42,462 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:14:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-16 16:14:42,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-09-16 16:14:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-16 16:14:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-16 16:14:42,469 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-09-16 16:14:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:42,470 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-16 16:14:42,470 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 16:14:42,470 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-16 16:14:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-16 16:14:42,471 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:42,471 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:42,472 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:42,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2103920742, now seen corresponding path program 1 times [2019-09-16 16:14:42,472 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:42,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:42,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:42,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-16 16:14:42,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:42,590 INFO L224 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 [2019-09-16 16:14:42,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:42,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-16 16:14:42,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-16 16:14:42,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:42,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-09-16 16:14:42,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-16 16:14:42,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-16 16:14:42,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-16 16:14:42,700 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-09-16 16:14:42,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:42,849 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2019-09-16 16:14:42,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 16:14:42,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-09-16 16:14:42,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:42,853 INFO L225 Difference]: With dead ends: 61 [2019-09-16 16:14:42,853 INFO L226 Difference]: Without dead ends: 44 [2019-09-16 16:14:42,854 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-09-16 16:14:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-16 16:14:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-09-16 16:14:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-16 16:14:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-09-16 16:14:42,864 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2019-09-16 16:14:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:42,864 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-09-16 16:14:42,865 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-16 16:14:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-09-16 16:14:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-16 16:14:42,866 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:42,866 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:42,867 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:42,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1242247089, now seen corresponding path program 1 times [2019-09-16 16:14:42,867 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:42,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:42,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:42,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-16 16:14:43,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:43,091 INFO L224 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 [2019-09-16 16:14:43,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:43,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-16 16:14:43,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 16:14:43,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:43,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-09-16 16:14:43,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-16 16:14:43,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-16 16:14:43,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-09-16 16:14:43,245 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 15 states. [2019-09-16 16:14:43,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:43,834 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2019-09-16 16:14:43,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-16 16:14:43,835 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2019-09-16 16:14:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:43,836 INFO L225 Difference]: With dead ends: 130 [2019-09-16 16:14:43,837 INFO L226 Difference]: Without dead ends: 104 [2019-09-16 16:14:43,838 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-09-16 16:14:43,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-16 16:14:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2019-09-16 16:14:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-16 16:14:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2019-09-16 16:14:43,853 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 36 [2019-09-16 16:14:43,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:43,854 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2019-09-16 16:14:43,854 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-16 16:14:43,854 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2019-09-16 16:14:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-16 16:14:43,856 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:43,857 INFO L407 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:43,857 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:43,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:43,857 INFO L82 PathProgramCache]: Analyzing trace with hash -999025673, now seen corresponding path program 2 times [2019-09-16 16:14:43,858 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:43,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:43,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:43,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:43,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-16 16:14:44,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:44,206 INFO L224 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) [2019-09-16 16:14:44,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:14:44,279 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:14:44,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:44,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-16 16:14:44,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-09-16 16:14:44,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:44,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2019-09-16 16:14:44,481 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-16 16:14:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-16 16:14:44,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2019-09-16 16:14:44,482 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 26 states. [2019-09-16 16:14:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:45,763 INFO L93 Difference]: Finished difference Result 271 states and 362 transitions. [2019-09-16 16:14:45,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-16 16:14:45,764 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2019-09-16 16:14:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:45,766 INFO L225 Difference]: With dead ends: 271 [2019-09-16 16:14:45,767 INFO L226 Difference]: Without dead ends: 204 [2019-09-16 16:14:45,769 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1143, Invalid=3017, Unknown=0, NotChecked=0, Total=4160 [2019-09-16 16:14:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-09-16 16:14:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 151. [2019-09-16 16:14:45,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-16 16:14:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2019-09-16 16:14:45,797 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 56 [2019-09-16 16:14:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:45,798 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2019-09-16 16:14:45,798 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-16 16:14:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2019-09-16 16:14:45,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-16 16:14:45,806 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:45,807 INFO L407 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:45,807 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:45,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:45,807 INFO L82 PathProgramCache]: Analyzing trace with hash 954308804, now seen corresponding path program 3 times [2019-09-16 16:14:45,808 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:45,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:45,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:45,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:45,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-16 16:14:46,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:46,359 INFO L224 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 [2019-09-16 16:14:46,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:14:46,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-16 16:14:46,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:46,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-16 16:14:46,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-09-16 16:14:46,484 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-16 16:14:46,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2019-09-16 16:14:46,485 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-16 16:14:46,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-16 16:14:46,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-09-16 16:14:46,486 INFO L87 Difference]: Start difference. First operand 151 states and 191 transitions. Second operand 28 states. [2019-09-16 16:14:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:47,158 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2019-09-16 16:14:47,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-16 16:14:47,159 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2019-09-16 16:14:47,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:47,160 INFO L225 Difference]: With dead ends: 244 [2019-09-16 16:14:47,160 INFO L226 Difference]: Without dead ends: 173 [2019-09-16 16:14:47,162 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2019-09-16 16:14:47,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-09-16 16:14:47,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 106. [2019-09-16 16:14:47,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-16 16:14:47,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2019-09-16 16:14:47,175 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 81 [2019-09-16 16:14:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:47,175 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2019-09-16 16:14:47,175 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-16 16:14:47,175 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2019-09-16 16:14:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-16 16:14:47,177 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:47,177 INFO L407 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:47,177 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:47,178 INFO L82 PathProgramCache]: Analyzing trace with hash -787338302, now seen corresponding path program 4 times [2019-09-16 16:14:47,178 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:47,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:47,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:47,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:47,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-09-16 16:14:47,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:47,294 INFO L224 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 [2019-09-16 16:14:47,315 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:14:47,393 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:14:47,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:47,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-16 16:14:47,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-09-16 16:14:47,580 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:47,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2019-09-16 16:14:47,581 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-16 16:14:47,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-16 16:14:47,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-09-16 16:14:47,583 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 25 states. [2019-09-16 16:14:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:48,103 INFO L93 Difference]: Finished difference Result 262 states and 320 transitions. [2019-09-16 16:14:48,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-16 16:14:48,105 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2019-09-16 16:14:48,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:48,106 INFO L225 Difference]: With dead ends: 262 [2019-09-16 16:14:48,107 INFO L226 Difference]: Without dead ends: 189 [2019-09-16 16:14:48,108 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2019-09-16 16:14:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-09-16 16:14:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 178. [2019-09-16 16:14:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-09-16 16:14:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 198 transitions. [2019-09-16 16:14:48,126 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 198 transitions. Word has length 81 [2019-09-16 16:14:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:48,127 INFO L475 AbstractCegarLoop]: Abstraction has 178 states and 198 transitions. [2019-09-16 16:14:48,127 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-16 16:14:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 198 transitions. [2019-09-16 16:14:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-16 16:14:48,130 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:48,130 INFO L407 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:48,130 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:48,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:48,130 INFO L82 PathProgramCache]: Analyzing trace with hash -273507723, now seen corresponding path program 5 times [2019-09-16 16:14:48,131 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:48,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:48,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:48,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:48,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2019-09-16 16:14:48,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:48,427 INFO L224 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 [2019-09-16 16:14:48,449 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-16 16:17:19,196 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-09-16 16:17:19,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:17:19,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-16 16:17:19,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:17:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 313 proven. 57 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2019-09-16 16:17:19,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:17:19,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2019-09-16 16:17:19,439 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-16 16:17:19,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-16 16:17:19,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=420, Unknown=0, NotChecked=0, Total=756 [2019-09-16 16:17:19,440 INFO L87 Difference]: Start difference. First operand 178 states and 198 transitions. Second operand 28 states. [2019-09-16 16:17:20,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:17:20,237 INFO L93 Difference]: Finished difference Result 547 states and 602 transitions. [2019-09-16 16:17:20,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-16 16:17:20,237 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 126 [2019-09-16 16:17:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:17:20,241 INFO L225 Difference]: With dead ends: 547 [2019-09-16 16:17:20,241 INFO L226 Difference]: Without dead ends: 420 [2019-09-16 16:17:20,243 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1036, Invalid=1720, Unknown=0, NotChecked=0, Total=2756 [2019-09-16 16:17:20,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2019-09-16 16:17:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 191. [2019-09-16 16:17:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-09-16 16:17:20,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 212 transitions. [2019-09-16 16:17:20,276 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 212 transitions. Word has length 126 [2019-09-16 16:17:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:17:20,276 INFO L475 AbstractCegarLoop]: Abstraction has 191 states and 212 transitions. [2019-09-16 16:17:20,277 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-16 16:17:20,277 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 212 transitions. [2019-09-16 16:17:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-16 16:17:20,282 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:17:20,282 INFO L407 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:17:20,283 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:17:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:17:20,283 INFO L82 PathProgramCache]: Analyzing trace with hash 610213781, now seen corresponding path program 6 times [2019-09-16 16:17:20,283 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:17:20,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:17:20,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:17:20,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:17:20,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:17:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:17:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 775 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2019-09-16 16:17:20,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:17:20,702 INFO L224 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 [2019-09-16 16:17:20,735 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-16 16:19:23,142 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-09-16 16:19:23,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:19:23,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-16 16:19:23,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:19:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 775 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2019-09-16 16:19:23,221 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:19:23,221 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2019-09-16 16:19:23,222 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-16 16:19:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-16 16:19:23,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-09-16 16:19:23,225 INFO L87 Difference]: Start difference. First operand 191 states and 212 transitions. Second operand 21 states. [2019-09-16 16:19:23,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:19:23,645 INFO L93 Difference]: Finished difference Result 208 states and 231 transitions. [2019-09-16 16:19:23,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-16 16:19:23,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 136 [2019-09-16 16:19:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:19:23,651 INFO L225 Difference]: With dead ends: 208 [2019-09-16 16:19:23,651 INFO L226 Difference]: Without dead ends: 196 [2019-09-16 16:19:23,653 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2019-09-16 16:19:23,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-09-16 16:19:23,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2019-09-16 16:19:23,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-09-16 16:19:23,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 215 transitions. [2019-09-16 16:19:23,675 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 215 transitions. Word has length 136 [2019-09-16 16:19:23,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:19:23,679 INFO L475 AbstractCegarLoop]: Abstraction has 194 states and 215 transitions. [2019-09-16 16:19:23,679 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-16 16:19:23,679 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 215 transitions. [2019-09-16 16:19:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-16 16:19:23,686 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:19:23,686 INFO L407 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:19:23,686 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:19:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:19:23,687 INFO L82 PathProgramCache]: Analyzing trace with hash 176484695, now seen corresponding path program 1 times [2019-09-16 16:19:23,687 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:19:23,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:19:23,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:23,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:19:23,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-09-16 16:19:24,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:19:24,209 INFO L224 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 [2019-09-16 16:19:24,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:19:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:24,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-16 16:19:24,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:19:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 16:19:24,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:19:24,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-16 16:19:24,352 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-16 16:19:24,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-16 16:19:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-16 16:19:24,353 INFO L87 Difference]: Start difference. First operand 194 states and 215 transitions. Second operand 28 states. [2019-09-16 16:19:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:19:24,687 INFO L93 Difference]: Finished difference Result 818 states and 863 transitions. [2019-09-16 16:19:24,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-16 16:19:24,687 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 136 [2019-09-16 16:19:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:19:24,691 INFO L225 Difference]: With dead ends: 818 [2019-09-16 16:19:24,691 INFO L226 Difference]: Without dead ends: 679 [2019-09-16 16:19:24,692 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-16 16:19:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-09-16 16:19:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 199. [2019-09-16 16:19:24,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-09-16 16:19:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 221 transitions. [2019-09-16 16:19:24,712 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 221 transitions. Word has length 136 [2019-09-16 16:19:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:19:24,712 INFO L475 AbstractCegarLoop]: Abstraction has 199 states and 221 transitions. [2019-09-16 16:19:24,712 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-16 16:19:24,712 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 221 transitions. [2019-09-16 16:19:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-16 16:19:24,714 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:19:24,714 INFO L407 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:19:24,714 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:19:24,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:19:24,715 INFO L82 PathProgramCache]: Analyzing trace with hash 685712814, now seen corresponding path program 7 times [2019-09-16 16:19:24,715 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:19:24,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:19:24,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:24,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:19:24,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 848 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2019-09-16 16:19:25,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:19:25,002 INFO L224 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 [2019-09-16 16:19:25,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:19:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:25,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-16 16:19:25,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:19:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-09-16 16:19:25,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:19:25,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28] total 48 [2019-09-16 16:19:25,565 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-16 16:19:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-16 16:19:25,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2019-09-16 16:19:25,567 INFO L87 Difference]: Start difference. First operand 199 states and 221 transitions. Second operand 48 states. [2019-09-16 16:19:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:19:27,219 INFO L93 Difference]: Finished difference Result 1456 states and 1580 transitions. [2019-09-16 16:19:27,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-16 16:19:27,219 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 141 [2019-09-16 16:19:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:19:27,227 INFO L225 Difference]: With dead ends: 1456 [2019-09-16 16:19:27,228 INFO L226 Difference]: Without dead ends: 1314 [2019-09-16 16:19:27,231 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2019-09-16 16:19:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2019-09-16 16:19:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 359. [2019-09-16 16:19:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-09-16 16:19:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 401 transitions. [2019-09-16 16:19:27,290 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 401 transitions. Word has length 141 [2019-09-16 16:19:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:19:27,290 INFO L475 AbstractCegarLoop]: Abstraction has 359 states and 401 transitions. [2019-09-16 16:19:27,290 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-16 16:19:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 401 transitions. [2019-09-16 16:19:27,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-09-16 16:19:27,294 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:19:27,294 INFO L407 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:19:27,294 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:19:27,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:19:27,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2001504454, now seen corresponding path program 8 times [2019-09-16 16:19:27,295 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:19:27,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:19:27,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:27,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:19:27,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 2938 refuted. 0 times theorem prover too weak. 2102 trivial. 0 not checked. [2019-09-16 16:19:28,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:19:28,277 INFO L224 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 [2019-09-16 16:19:28,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:19:28,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:19:28,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:19:28,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-16 16:19:28,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:19:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2019-09-16 16:19:29,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:19:29,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 48] total 88 [2019-09-16 16:19:29,356 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-16 16:19:29,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-16 16:19:29,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2019-09-16 16:19:29,360 INFO L87 Difference]: Start difference. First operand 359 states and 401 transitions. Second operand 88 states. [2019-09-16 16:19:34,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:19:34,044 INFO L93 Difference]: Finished difference Result 2006 states and 2250 transitions. [2019-09-16 16:19:34,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-16 16:19:34,045 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 241 [2019-09-16 16:19:34,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:19:34,052 INFO L225 Difference]: With dead ends: 2006 [2019-09-16 16:19:34,052 INFO L226 Difference]: Without dead ends: 1744 [2019-09-16 16:19:34,061 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8814 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2019-09-16 16:19:34,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2019-09-16 16:19:34,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 679. [2019-09-16 16:19:34,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-09-16 16:19:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 761 transitions. [2019-09-16 16:19:34,164 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 761 transitions. Word has length 241 [2019-09-16 16:19:34,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:19:34,164 INFO L475 AbstractCegarLoop]: Abstraction has 679 states and 761 transitions. [2019-09-16 16:19:34,164 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-16 16:19:34,164 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 761 transitions. [2019-09-16 16:19:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2019-09-16 16:19:34,192 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:19:34,192 INFO L407 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:19:34,193 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:19:34,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:19:34,193 INFO L82 PathProgramCache]: Analyzing trace with hash 520310518, now seen corresponding path program 9 times [2019-09-16 16:19:34,193 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:19:34,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:19:34,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:34,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:19:34,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 10718 refuted. 0 times theorem prover too weak. 7302 trivial. 0 not checked. [2019-09-16 16:19:37,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:19:37,238 INFO L224 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 [2019-09-16 16:19:37,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:21:52,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-16 16:21:52,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:21:53,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-16 16:21:53,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:21:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 1786 proven. 77 refuted. 0 times theorem prover too weak. 16157 trivial. 0 not checked. [2019-09-16 16:21:53,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:21:53,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 11] total 91 [2019-09-16 16:21:53,276 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-16 16:21:53,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-16 16:21:53,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3928, Invalid=4262, Unknown=0, NotChecked=0, Total=8190 [2019-09-16 16:21:53,278 INFO L87 Difference]: Start difference. First operand 679 states and 761 transitions. Second operand 91 states. [2019-09-16 16:22:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:22:00,249 INFO L93 Difference]: Finished difference Result 7716 states and 7926 transitions. [2019-09-16 16:22:00,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-16 16:22:00,254 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 441 [2019-09-16 16:22:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:22:00,281 INFO L225 Difference]: With dead ends: 7716 [2019-09-16 16:22:00,281 INFO L226 Difference]: Without dead ends: 7214 [2019-09-16 16:22:00,286 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5786 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=11936, Invalid=19926, Unknown=0, NotChecked=0, Total=31862 [2019-09-16 16:22:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7214 states. [2019-09-16 16:22:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7214 to 692. [2019-09-16 16:22:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2019-09-16 16:22:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 775 transitions. [2019-09-16 16:22:00,545 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 775 transitions. Word has length 441 [2019-09-16 16:22:00,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:22:00,546 INFO L475 AbstractCegarLoop]: Abstraction has 692 states and 775 transitions. [2019-09-16 16:22:00,546 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-16 16:22:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 775 transitions. [2019-09-16 16:22:00,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2019-09-16 16:22:00,555 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:22:00,555 INFO L407 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:22:00,556 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:22:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:22:00,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1569150542, now seen corresponding path program 10 times [2019-09-16 16:22:00,556 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:22:00,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:22:00,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:22:00,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:22:00,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:22:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:22:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18879 backedges. 0 proven. 11210 refuted. 0 times theorem prover too weak. 7669 trivial. 0 not checked. [2019-09-16 16:22:03,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:22:03,796 INFO L224 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 [2019-09-16 16:22:03,845 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:22:16,064 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:22:16,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:22:16,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 89 conjunts are in the unsatisfiable core [2019-09-16 16:22:16,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:22:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18879 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 11310 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 16:22:19,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:22:19,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 90] total 171 [2019-09-16 16:22:19,375 INFO L454 AbstractCegarLoop]: Interpolant automaton has 171 states [2019-09-16 16:22:19,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2019-09-16 16:22:19,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14367, Invalid=14703, Unknown=0, NotChecked=0, Total=29070 [2019-09-16 16:22:19,380 INFO L87 Difference]: Start difference. First operand 692 states and 775 transitions. Second operand 171 states. [2019-09-16 16:22:45,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:22:45,360 INFO L93 Difference]: Finished difference Result 20496 states and 20986 transitions. [2019-09-16 16:22:45,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2019-09-16 16:22:45,360 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 451 [2019-09-16 16:22:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:22:45,426 INFO L225 Difference]: With dead ends: 20496 [2019-09-16 16:22:45,426 INFO L226 Difference]: Without dead ends: 19985 [2019-09-16 16:22:45,434 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34884 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=43095, Invalid=71487, Unknown=0, NotChecked=0, Total=114582 [2019-09-16 16:22:45,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19985 states. [2019-09-16 16:22:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19985 to 1340. [2019-09-16 16:22:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1340 states. [2019-09-16 16:22:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1504 transitions. [2019-09-16 16:22:46,853 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1504 transitions. Word has length 451 [2019-09-16 16:22:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:22:46,853 INFO L475 AbstractCegarLoop]: Abstraction has 1340 states and 1504 transitions. [2019-09-16 16:22:46,853 INFO L476 AbstractCegarLoop]: Interpolant automaton has 171 states. [2019-09-16 16:22:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1504 transitions. [2019-09-16 16:22:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2019-09-16 16:22:46,862 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:22:46,862 INFO L407 BasicCegarLoop]: trace histogram [168, 168, 168, 168, 167, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:22:46,863 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:22:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:22:46,863 INFO L82 PathProgramCache]: Analyzing trace with hash 897897465, now seen corresponding path program 11 times [2019-09-16 16:22:46,864 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:22:46,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:22:46,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:22:46,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:22:46,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:22:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:22:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 70476 backedges. 0 proven. 42152 refuted. 0 times theorem prover too weak. 28324 trivial. 0 not checked. [2019-09-16 16:22:57,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:22:57,545 INFO L224 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 [2019-09-16 16:22:57,612 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1