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/copysome1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 16:14:40,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 16:14:40,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 16:14:40,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 16:14:40,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 16:14:40,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 16:14:40,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 16:14:40,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 16:14:40,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 16:14:40,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 16:14:40,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 16:14:40,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 16:14:40,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 16:14:40,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 16:14:40,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 16:14:40,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 16:14:40,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 16:14:40,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 16:14:40,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 16:14:40,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 16:14:40,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 16:14:40,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 16:14:40,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 16:14:40,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 16:14:40,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 16:14:40,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 16:14:40,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 16:14:40,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 16:14:40,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 16:14:40,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 16:14:40,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 16:14:40,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 16:14:40,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 16:14:40,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 16:14:40,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 16:14:40,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 16:14:40,265 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 16:14:40,283 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 16:14:40,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 16:14:40,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-16 16:14:40,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-16 16:14:40,289 INFO L138 SettingsManager]: * Use SBE=true [2019-09-16 16:14:40,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 16:14:40,290 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 16:14:40,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-16 16:14:40,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 16:14:40,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 16:14:40,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 16:14:40,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 16:14:40,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 16:14:40,292 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 16:14:40,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 16:14:40,292 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-16 16:14:40,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 16:14:40,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 16:14:40,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 16:14:40,294 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-16 16:14:40,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-16 16:14:40,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:14:40,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 16:14:40,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 16:14:40,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-16 16:14:40,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-16 16:14:40,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 16:14:40,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-16 16:14:40,297 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 16:14:40,328 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 16:14:40,339 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 16:14:40,343 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 16:14:40,347 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 16:14:40,347 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 16:14:40,348 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-1.i [2019-09-16 16:14:40,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f122fb0c0/bd17b68ce017424b9cce9301c724e79e/FLAG32ffadd29 [2019-09-16 16:14:40,917 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 16:14:40,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-1.i [2019-09-16 16:14:40,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f122fb0c0/bd17b68ce017424b9cce9301c724e79e/FLAG32ffadd29 [2019-09-16 16:14:41,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f122fb0c0/bd17b68ce017424b9cce9301c724e79e [2019-09-16 16:14:41,307 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 16:14:41,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 16:14:41,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 16:14:41,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 16:14:41,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 16:14:41,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:14:41" (1/1) ... [2019-09-16 16:14:41,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32971c3b 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 16:14:41,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:14:41" (1/1) ... [2019-09-16 16:14:41,330 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 16:14:41,350 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 16:14:41,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:14:41,529 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 16:14:41,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:14:41,582 INFO L192 MainTranslator]: Completed translation [2019-09-16 16:14:41,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:14:41 WrapperNode [2019-09-16 16:14:41,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 16:14:41,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 16:14:41,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 16:14:41,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 16:14:41,703 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 16:14:41,704 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 16:14:41,712 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 16:14:41,712 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 16:14:41,720 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 16:14:41,728 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 16:14:41,730 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 16:14:41,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 16:14:41,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 16:14:41,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 16:14:41,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 16:14:41,734 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 16:14:41,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 16:14:41,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 16:14:41,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 16:14:41,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 16:14:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 16:14:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 16:14:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-16 16:14:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 16:14:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 16:14:41,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 16:14:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 16:14:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 16:14:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 16:14:41,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 16:14:42,094 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 16:14:42,095 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-16 16:14:42,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:14:42 BoogieIcfgContainer [2019-09-16 16:14:42,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 16:14:42,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 16:14:42,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 16:14:42,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 16:14:42,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 04:14:41" (1/3) ... [2019-09-16 16:14:42,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6b07ec 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 16:14:42,102 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 16:14:42,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d6b07ec 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 16:14:42,102 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 16:14:42,104 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-1.i [2019-09-16 16:14:42,113 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 16:14:42,119 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 16:14:42,133 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 16:14:42,158 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-16 16:14:42,159 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 16:14:42,159 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-16 16:14:42,159 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 16:14:42,159 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 16:14:42,159 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 16:14:42,159 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 16:14:42,159 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 16:14:42,160 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 16:14:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-16 16:14:42,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 16:14:42,181 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:42,182 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:42,184 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:42,189 INFO L82 PathProgramCache]: Analyzing trace with hash -908266250, now seen corresponding path program 1 times [2019-09-16 16:14:42,190 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:42,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:42,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:42,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:42,327 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 16:14:42,329 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:42,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 16:14:42,332 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 16:14:42,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 16:14:42,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:14:42,346 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-16 16:14:42,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:42,371 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2019-09-16 16:14:42,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 16:14:42,372 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-16 16:14:42,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:42,381 INFO L225 Difference]: With dead ends: 50 [2019-09-16 16:14:42,381 INFO L226 Difference]: Without dead ends: 24 [2019-09-16 16:14:42,385 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 16:14:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-16 16:14:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-16 16:14:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-16 16:14:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-16 16:14:42,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2019-09-16 16:14:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:42,424 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-16 16:14:42,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 16:14:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-16 16:14:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 16:14:42,425 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:42,425 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:42,426 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:42,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1720229721, now seen corresponding path program 1 times [2019-09-16 16:14:42,427 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:42,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:42,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:42,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:42,492 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 16:14:42,492 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:14:42,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 16:14:42,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 16:14:42,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 16:14:42,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:14:42,496 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-09-16 16:14:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:42,581 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2019-09-16 16:14:42,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 16:14:42,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-16 16:14:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:42,583 INFO L225 Difference]: With dead ends: 45 [2019-09-16 16:14:42,583 INFO L226 Difference]: Without dead ends: 29 [2019-09-16 16:14:42,584 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 16:14:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-16 16:14:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-09-16 16:14:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-16 16:14:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-16 16:14:42,592 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2019-09-16 16:14:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:42,592 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-16 16:14:42,592 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 16:14:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-16 16:14:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-16 16:14:42,593 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:42,593 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 16:14:42,593 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:42,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2103920742, now seen corresponding path program 1 times [2019-09-16 16:14:42,594 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:42,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:42,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:42,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:42,701 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 16:14:42,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:42,702 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:14:42,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:42,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-16 16:14:42,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:42,824 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 16:14:42,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:42,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-09-16 16:14:42,831 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-16 16:14:42,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-16 16:14:42,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-16 16:14:42,832 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-09-16 16:14:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:43,030 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2019-09-16 16:14:43,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 16:14:43,033 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-09-16 16:14:43,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:43,036 INFO L225 Difference]: With dead ends: 61 [2019-09-16 16:14:43,036 INFO L226 Difference]: Without dead ends: 44 [2019-09-16 16:14:43,037 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-09-16 16:14:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-16 16:14:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2019-09-16 16:14:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-16 16:14:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-09-16 16:14:43,058 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2019-09-16 16:14:43,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:43,060 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-09-16 16:14:43,060 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-16 16:14:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-09-16 16:14:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-16 16:14:43,063 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:43,063 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 16:14:43,063 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:43,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:43,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1242247089, now seen corresponding path program 1 times [2019-09-16 16:14:43,064 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:43,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:43,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:43,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:43,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:43,303 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 16:14:43,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:43,304 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 16:14:43,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:43,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-16 16:14:43,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-16 16:14:43,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:43,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-09-16 16:14:43,470 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-16 16:14:43,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-16 16:14:43,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-09-16 16:14:43,471 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 15 states. [2019-09-16 16:14:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:44,111 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2019-09-16 16:14:44,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-16 16:14:44,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2019-09-16 16:14:44,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:44,114 INFO L225 Difference]: With dead ends: 130 [2019-09-16 16:14:44,116 INFO L226 Difference]: Without dead ends: 104 [2019-09-16 16:14:44,117 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2019-09-16 16:14:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-16 16:14:44,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2019-09-16 16:14:44,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-16 16:14:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2019-09-16 16:14:44,149 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 36 [2019-09-16 16:14:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:44,151 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2019-09-16 16:14:44,151 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-16 16:14:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2019-09-16 16:14:44,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-16 16:14:44,156 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:44,156 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 16:14:44,157 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash -999025673, now seen corresponding path program 2 times [2019-09-16 16:14:44,158 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:44,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:44,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:44,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:44,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:44,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:44,456 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 16:14:44,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:44,457 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:14:44,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:14:44,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:14:44,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:44,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-16 16:14:44,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:44,717 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 16:14:44,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:44,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 26 [2019-09-16 16:14:44,722 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-16 16:14:44,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-16 16:14:44,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2019-09-16 16:14:44,723 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 26 states. [2019-09-16 16:14:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:46,096 INFO L93 Difference]: Finished difference Result 271 states and 362 transitions. [2019-09-16 16:14:46,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-16 16:14:46,096 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2019-09-16 16:14:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:46,099 INFO L225 Difference]: With dead ends: 271 [2019-09-16 16:14:46,099 INFO L226 Difference]: Without dead ends: 204 [2019-09-16 16:14:46,102 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 16:14:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-09-16 16:14:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 151. [2019-09-16 16:14:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-16 16:14:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2019-09-16 16:14:46,124 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 56 [2019-09-16 16:14:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:46,124 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2019-09-16 16:14:46,124 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-16 16:14:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2019-09-16 16:14:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-16 16:14:46,126 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:46,126 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 16:14:46,127 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:46,127 INFO L82 PathProgramCache]: Analyzing trace with hash 954308804, now seen corresponding path program 3 times [2019-09-16 16:14:46,127 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:46,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:46,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:46,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:46,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:46,536 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 16:14:46,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:46,537 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 16:14:46,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:14:46,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-16 16:14:46,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:46,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-16 16:14:46,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:46,662 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 16:14:46,665 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-16 16:14:46,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [26] total 28 [2019-09-16 16:14:46,666 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-16 16:14:46,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-16 16:14:46,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-09-16 16:14:46,669 INFO L87 Difference]: Start difference. First operand 151 states and 191 transitions. Second operand 28 states. [2019-09-16 16:14:47,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:47,291 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2019-09-16 16:14:47,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-16 16:14:47,292 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2019-09-16 16:14:47,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:47,294 INFO L225 Difference]: With dead ends: 244 [2019-09-16 16:14:47,294 INFO L226 Difference]: Without dead ends: 173 [2019-09-16 16:14:47,296 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2019-09-16 16:14:47,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-09-16 16:14:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 106. [2019-09-16 16:14:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-16 16:14:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2019-09-16 16:14:47,310 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 81 [2019-09-16 16:14:47,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:47,311 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2019-09-16 16:14:47,311 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-16 16:14:47,312 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2019-09-16 16:14:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-16 16:14:47,314 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:47,314 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 16:14:47,314 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:47,314 INFO L82 PathProgramCache]: Analyzing trace with hash -787338302, now seen corresponding path program 4 times [2019-09-16 16:14:47,315 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:47,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:47,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:47,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:47,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:47,561 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 16:14:47,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:47,562 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 16:14:47,584 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:14:47,682 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:14:47,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:47,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-16 16:14:47,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:47,880 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 16:14:47,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:47,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2019-09-16 16:14:47,889 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-16 16:14:47,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-16 16:14:47,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-09-16 16:14:47,890 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 25 states. [2019-09-16 16:14:48,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:48,456 INFO L93 Difference]: Finished difference Result 262 states and 320 transitions. [2019-09-16 16:14:48,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-16 16:14:48,458 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2019-09-16 16:14:48,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:48,459 INFO L225 Difference]: With dead ends: 262 [2019-09-16 16:14:48,459 INFO L226 Difference]: Without dead ends: 189 [2019-09-16 16:14:48,461 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 16:14:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-09-16 16:14:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 178. [2019-09-16 16:14:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-09-16 16:14:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 198 transitions. [2019-09-16 16:14:48,479 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 198 transitions. Word has length 81 [2019-09-16 16:14:48,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:48,480 INFO L475 AbstractCegarLoop]: Abstraction has 178 states and 198 transitions. [2019-09-16 16:14:48,480 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-16 16:14:48,480 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 198 transitions. [2019-09-16 16:14:48,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-09-16 16:14:48,482 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:48,483 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 16:14:48,483 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:48,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:48,483 INFO L82 PathProgramCache]: Analyzing trace with hash -273507723, now seen corresponding path program 5 times [2019-09-16 16:14:48,483 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:48,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:48,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:48,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:48,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:48,770 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 16:14:48,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:48,770 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 16:14:48,794 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-16 16:17:20,204 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-09-16 16:17:20,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:17:20,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-16 16:17:20,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:17:20,413 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 16:17:20,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:17:20,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2019-09-16 16:17:20,441 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-16 16:17:20,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-16 16:17:20,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=420, Unknown=0, NotChecked=0, Total=756 [2019-09-16 16:17:20,443 INFO L87 Difference]: Start difference. First operand 178 states and 198 transitions. Second operand 28 states. [2019-09-16 16:17:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:17:21,184 INFO L93 Difference]: Finished difference Result 547 states and 602 transitions. [2019-09-16 16:17:21,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-16 16:17:21,185 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 126 [2019-09-16 16:17:21,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:17:21,189 INFO L225 Difference]: With dead ends: 547 [2019-09-16 16:17:21,190 INFO L226 Difference]: Without dead ends: 420 [2019-09-16 16:17:21,193 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1036, Invalid=1720, Unknown=0, NotChecked=0, Total=2756 [2019-09-16 16:17:21,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2019-09-16 16:17:21,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 191. [2019-09-16 16:17:21,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-09-16 16:17:21,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 212 transitions. [2019-09-16 16:17:21,221 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 212 transitions. Word has length 126 [2019-09-16 16:17:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:17:21,223 INFO L475 AbstractCegarLoop]: Abstraction has 191 states and 212 transitions. [2019-09-16 16:17:21,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-16 16:17:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 212 transitions. [2019-09-16 16:17:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-16 16:17:21,232 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:17:21,233 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 16:17:21,233 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:17:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:17:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash 610213781, now seen corresponding path program 6 times [2019-09-16 16:17:21,234 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:17:21,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:17:21,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:17:21,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:17:21,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:17:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:17:21,692 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 16:17:21,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:17:21,693 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 16:17:21,731 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-16 16:19:22,868 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-09-16 16:19:22,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:19:22,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-16 16:19:22,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:19:22,936 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 16:19:22,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:19:22,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2019-09-16 16:19:22,958 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-16 16:19:22,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-16 16:19:22,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-09-16 16:19:22,959 INFO L87 Difference]: Start difference. First operand 191 states and 212 transitions. Second operand 21 states. [2019-09-16 16:19:23,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:19:23,427 INFO L93 Difference]: Finished difference Result 208 states and 231 transitions. [2019-09-16 16:19:23,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-16 16:19:23,428 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 136 [2019-09-16 16:19:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:19:23,430 INFO L225 Difference]: With dead ends: 208 [2019-09-16 16:19:23,430 INFO L226 Difference]: Without dead ends: 196 [2019-09-16 16:19:23,431 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 16:19:23,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-09-16 16:19:23,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2019-09-16 16:19:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-09-16 16:19:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 215 transitions. [2019-09-16 16:19:23,450 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 215 transitions. Word has length 136 [2019-09-16 16:19:23,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:19:23,451 INFO L475 AbstractCegarLoop]: Abstraction has 194 states and 215 transitions. [2019-09-16 16:19:23,451 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-16 16:19:23,451 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 215 transitions. [2019-09-16 16:19:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-16 16:19:23,453 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:19:23,454 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 16:19:23,454 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:19:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:19:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash 176484695, now seen corresponding path program 1 times [2019-09-16 16:19:23,454 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:19:23,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:19:23,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:23,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:19:23,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:23,947 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 16:19:23,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:19:23,947 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 16:19:23,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:19:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:24,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-16 16:19:24,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:19:24,072 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 16:19:24,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:19:24,085 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-16 16:19:24,085 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-16 16:19:24,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-16 16:19:24,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-16 16:19:24,086 INFO L87 Difference]: Start difference. First operand 194 states and 215 transitions. Second operand 28 states. [2019-09-16 16:19:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:19:24,414 INFO L93 Difference]: Finished difference Result 818 states and 863 transitions. [2019-09-16 16:19:24,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-16 16:19:24,415 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 136 [2019-09-16 16:19:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:19:24,418 INFO L225 Difference]: With dead ends: 818 [2019-09-16 16:19:24,418 INFO L226 Difference]: Without dead ends: 679 [2019-09-16 16:19:24,420 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-16 16:19:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-09-16 16:19:24,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 199. [2019-09-16 16:19:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-09-16 16:19:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 221 transitions. [2019-09-16 16:19:24,438 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 221 transitions. Word has length 136 [2019-09-16 16:19:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:19:24,439 INFO L475 AbstractCegarLoop]: Abstraction has 199 states and 221 transitions. [2019-09-16 16:19:24,439 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-16 16:19:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 221 transitions. [2019-09-16 16:19:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-16 16:19:24,440 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:19:24,441 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 16:19:24,441 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:19:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:19:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash 685712814, now seen corresponding path program 7 times [2019-09-16 16:19:24,441 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:19:24,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:19:24,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:24,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:19:24,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:24,761 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 16:19:24,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:19:24,762 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 16:19:24,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:19:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:24,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-16 16:19:24,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:19:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 16:19:25,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:19:25,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28] total 48 [2019-09-16 16:19:25,351 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-16 16:19:25,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-16 16:19:25,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2019-09-16 16:19:25,352 INFO L87 Difference]: Start difference. First operand 199 states and 221 transitions. Second operand 48 states. [2019-09-16 16:19:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:19:27,043 INFO L93 Difference]: Finished difference Result 1456 states and 1580 transitions. [2019-09-16 16:19:27,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-16 16:19:27,044 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 141 [2019-09-16 16:19:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:19:27,051 INFO L225 Difference]: With dead ends: 1456 [2019-09-16 16:19:27,051 INFO L226 Difference]: Without dead ends: 1314 [2019-09-16 16:19:27,054 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 16:19:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2019-09-16 16:19:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 359. [2019-09-16 16:19:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2019-09-16 16:19:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 401 transitions. [2019-09-16 16:19:27,117 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 401 transitions. Word has length 141 [2019-09-16 16:19:27,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:19:27,117 INFO L475 AbstractCegarLoop]: Abstraction has 359 states and 401 transitions. [2019-09-16 16:19:27,117 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-16 16:19:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 401 transitions. [2019-09-16 16:19:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-09-16 16:19:27,120 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:19:27,121 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 16:19:27,121 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:19:27,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:19:27,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2001504454, now seen corresponding path program 8 times [2019-09-16 16:19:27,121 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:19:27,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:19:27,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:27,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:19:27,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:28,335 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 16:19:28,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:19:28,335 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 16:19:28,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:19:28,490 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:19:28,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:19:28,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-16 16:19:28,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:19:29,396 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 16:19:29,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:19:29,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 48] total 88 [2019-09-16 16:19:29,401 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-16 16:19:29,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-16 16:19:29,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2019-09-16 16:19:29,405 INFO L87 Difference]: Start difference. First operand 359 states and 401 transitions. Second operand 88 states. [2019-09-16 16:19:34,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:19:34,093 INFO L93 Difference]: Finished difference Result 2006 states and 2250 transitions. [2019-09-16 16:19:34,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-16 16:19:34,096 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 241 [2019-09-16 16:19:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:19:34,106 INFO L225 Difference]: With dead ends: 2006 [2019-09-16 16:19:34,106 INFO L226 Difference]: Without dead ends: 1744 [2019-09-16 16:19:34,115 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 16:19:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2019-09-16 16:19:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 679. [2019-09-16 16:19:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-09-16 16:19:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 761 transitions. [2019-09-16 16:19:34,246 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 761 transitions. Word has length 241 [2019-09-16 16:19:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:19:34,247 INFO L475 AbstractCegarLoop]: Abstraction has 679 states and 761 transitions. [2019-09-16 16:19:34,247 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-16 16:19:34,247 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 761 transitions. [2019-09-16 16:19:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2019-09-16 16:19:34,255 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:19:34,255 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 16:19:34,256 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:19:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:19:34,256 INFO L82 PathProgramCache]: Analyzing trace with hash 520310518, now seen corresponding path program 9 times [2019-09-16 16:19:34,256 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:19:34,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:19:34,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:34,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:19:34,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:37,268 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 16:19:37,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:19:37,268 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 16:19:37,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:21:52,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-16 16:21:52,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:21:52,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-16 16:21:52,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:21:52,436 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 16:21:52,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:21:52,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 11] total 91 [2019-09-16 16:21:52,458 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-16 16:21:52,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-16 16:21:52,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3928, Invalid=4262, Unknown=0, NotChecked=0, Total=8190 [2019-09-16 16:21:52,460 INFO L87 Difference]: Start difference. First operand 679 states and 761 transitions. Second operand 91 states. [2019-09-16 16:21:59,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:21:59,619 INFO L93 Difference]: Finished difference Result 7716 states and 7926 transitions. [2019-09-16 16:21:59,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-09-16 16:21:59,619 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 441 [2019-09-16 16:21:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:21:59,648 INFO L225 Difference]: With dead ends: 7716 [2019-09-16 16:21:59,649 INFO L226 Difference]: Without dead ends: 7214 [2019-09-16 16:21:59,652 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 16:21:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7214 states. [2019-09-16 16:21:59,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7214 to 692. [2019-09-16 16:21:59,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2019-09-16 16:21:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 775 transitions. [2019-09-16 16:21:59,961 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 775 transitions. Word has length 441 [2019-09-16 16:21:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:21:59,962 INFO L475 AbstractCegarLoop]: Abstraction has 692 states and 775 transitions. [2019-09-16 16:21:59,962 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-16 16:21:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 775 transitions. [2019-09-16 16:21:59,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2019-09-16 16:21:59,971 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:21:59,971 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 16:21:59,972 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:21:59,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:21:59,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1569150542, now seen corresponding path program 10 times [2019-09-16 16:21:59,972 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:21:59,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:21:59,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:21:59,975 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:21:59,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:22:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:22:02,962 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 16:22:02,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:22:02,963 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 16:22:03,013 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:22:04,589 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:22:04,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:22:04,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 89 conjunts are in the unsatisfiable core [2019-09-16 16:22:04,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:22:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18879 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 11310 trivial. 0 not checked. [2019-09-16 16:22:07,657 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:22:07,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 90] total 171 [2019-09-16 16:22:07,658 INFO L454 AbstractCegarLoop]: Interpolant automaton has 171 states [2019-09-16 16:22:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2019-09-16 16:22:07,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14367, Invalid=14703, Unknown=0, NotChecked=0, Total=29070 [2019-09-16 16:22:07,663 INFO L87 Difference]: Start difference. First operand 692 states and 775 transitions. Second operand 171 states. [2019-09-16 16:22:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:22:34,052 INFO L93 Difference]: Finished difference Result 20496 states and 20986 transitions. [2019-09-16 16:22:34,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2019-09-16 16:22:34,052 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 451 [2019-09-16 16:22:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:22:34,123 INFO L225 Difference]: With dead ends: 20496 [2019-09-16 16:22:34,123 INFO L226 Difference]: Without dead ends: 19985 [2019-09-16 16:22:34,132 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 701 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34884 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=43095, Invalid=71487, Unknown=0, NotChecked=0, Total=114582 [2019-09-16 16:22:34,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19985 states. [2019-09-16 16:22:36,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19985 to 1340. [2019-09-16 16:22:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1340 states. [2019-09-16 16:22:36,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1504 transitions. [2019-09-16 16:22:36,071 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1504 transitions. Word has length 451 [2019-09-16 16:22:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:22:36,072 INFO L475 AbstractCegarLoop]: Abstraction has 1340 states and 1504 transitions. [2019-09-16 16:22:36,072 INFO L476 AbstractCegarLoop]: Interpolant automaton has 171 states. [2019-09-16 16:22:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1504 transitions. [2019-09-16 16:22:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 857 [2019-09-16 16:22:36,084 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:22:36,084 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 16:22:36,085 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:22:36,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:22:36,085 INFO L82 PathProgramCache]: Analyzing trace with hash 897897465, now seen corresponding path program 11 times [2019-09-16 16:22:36,086 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:22:36,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:22:36,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:22:36,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:22:36,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:22:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:22:46,425 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 16:22:46,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:22:46,426 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 16:22:46,495 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1