/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/mapsum2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:11:54,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:11:54,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:11:54,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:11:54,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:11:54,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:11:54,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:11:54,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:11:54,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:11:54,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:11:54,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:11:54,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:11:54,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:11:54,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:11:54,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:11:54,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:11:54,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:11:54,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:11:54,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:11:54,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:11:54,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:11:54,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:11:54,327 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:11:54,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:11:54,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:11:54,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:11:54,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:11:54,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:11:54,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:11:54,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:11:54,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:11:54,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:11:54,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:11:54,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:11:54,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:11:54,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:11:54,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:11:54,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:11:54,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:11:54,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:11:54,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:11:54,339 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 [2019-11-23 20:11:54,357 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:11:54,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:11:54,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:11:54,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:11:54,360 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:11:54,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:11:54,360 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:11:54,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:11:54,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:11:54,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:11:54,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:11:54,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:11:54,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:11:54,362 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:11:54,363 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:11:54,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:11:54,363 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:11:54,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:11:54,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:11:54,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:11:54,364 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:11:54,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:11:54,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:11:54,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:11:54,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:11:54,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:11:54,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:11:54,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:11:54,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:11:54,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:11:54,677 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:11:54,691 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:11:54,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:11:54,696 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:11:54,697 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:11:54,698 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum2.i [2019-11-23 20:11:54,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec83a7207/bca521cdd1bf4d8682a02844652e1bea/FLAG32888a414 [2019-11-23 20:11:55,207 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:11:55,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum2.i [2019-11-23 20:11:55,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec83a7207/bca521cdd1bf4d8682a02844652e1bea/FLAG32888a414 [2019-11-23 20:11:55,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec83a7207/bca521cdd1bf4d8682a02844652e1bea [2019-11-23 20:11:55,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:11:55,639 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:11:55,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:11:55,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:11:55,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:11:55,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:11:55" (1/1) ... [2019-11-23 20:11:55,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a053aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55, skipping insertion in model container [2019-11-23 20:11:55,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:11:55" (1/1) ... [2019-11-23 20:11:55,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:11:55,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:11:55,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:11:55,932 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:11:55,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:11:55,974 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:11:55,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55 WrapperNode [2019-11-23 20:11:55,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:11:55,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:11:55,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:11:55,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:11:56,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55" (1/1) ... [2019-11-23 20:11:56,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55" (1/1) ... [2019-11-23 20:11:56,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:11:56,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:11:56,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:11:56,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:11:56,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55" (1/1) ... [2019-11-23 20:11:56,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55" (1/1) ... [2019-11-23 20:11:56,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55" (1/1) ... [2019-11-23 20:11:56,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55" (1/1) ... [2019-11-23 20:11:56,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55" (1/1) ... [2019-11-23 20:11:56,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55" (1/1) ... [2019-11-23 20:11:56,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55" (1/1) ... [2019-11-23 20:11:56,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:11:56,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:11:56,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:11:56,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:11:56,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:11:56,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:11:56,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:11:56,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:11:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:11:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:11:56,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:11:56,543 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:11:56,543 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:11:56,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:11:56 BoogieIcfgContainer [2019-11-23 20:11:56,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:11:56,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:11:56,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:11:56,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:11:56,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:11:55" (1/3) ... [2019-11-23 20:11:56,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48bcd710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:11:56, skipping insertion in model container [2019-11-23 20:11:56,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:11:55" (2/3) ... [2019-11-23 20:11:56,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48bcd710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:11:56, skipping insertion in model container [2019-11-23 20:11:56,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:11:56" (3/3) ... [2019-11-23 20:11:56,553 INFO L109 eAbstractionObserver]: Analyzing ICFG mapsum2.i [2019-11-23 20:11:56,569 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:11:56,574 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:11:56,583 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:11:56,604 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:11:56,605 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:11:56,605 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:11:56,605 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:11:56,605 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:11:56,605 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:11:56,606 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:11:56,606 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:11:56,619 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:11:56,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:11:56,625 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:56,626 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:56,626 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:56,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:56,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 20:11:56,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:56,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655600422] [2019-11-23 20:11:56,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:11:56,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655600422] [2019-11-23 20:11:56,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:56,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:56,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731383624] [2019-11-23 20:11:56,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:56,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:56,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:56,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:56,819 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:11:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:56,853 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 20:11:56,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:56,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:11:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:56,864 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:11:56,864 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:11:56,867 INFO L630 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 [2019-11-23 20:11:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:11:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:11:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:11:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:11:56,899 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 20:11:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:56,900 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:11:56,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:11:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:11:56,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:56,901 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:56,902 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:56,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:56,902 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 20:11:56,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:56,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125439677] [2019-11-23 20:11:56,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:11:56,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125439677] [2019-11-23 20:11:56,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:56,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:56,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274777973] [2019-11-23 20:11:56,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:56,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:56,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:56,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:56,965 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 20:11:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:57,031 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:11:57,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:57,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:11:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:57,033 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:11:57,033 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:11:57,034 INFO L630 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 [2019-11-23 20:11:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:11:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:11:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:11:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:11:57,041 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 20:11:57,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,041 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:11:57,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:57,041 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:11:57,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:11:57,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,042 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:57,043 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:57,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 20:11:57,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:57,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061229820] [2019-11-23 20:11:57,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:57,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061229820] [2019-11-23 20:11:57,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:11:57,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:11:57,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813128508] [2019-11-23 20:11:57,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:11:57,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:57,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:11:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:11:57,153 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 20:11:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:57,179 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:11:57,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:11:57,180 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:11:57,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:57,181 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:11:57,181 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:11:57,181 INFO L630 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 [2019-11-23 20:11:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:11:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:11:57,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:11:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:11:57,194 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:11:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,194 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:11:57,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:11:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:11:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:11:57,195 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,195 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:57,196 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:57,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:57,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 20:11:57,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:57,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637006600] [2019-11-23 20:11:57,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:57,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637006600] [2019-11-23 20:11:57,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221958131] [2019-11-23 20:11:57,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:57,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:57,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:57,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:11:57,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31917393] [2019-11-23 20:11:57,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:11:57,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:11:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:11:57,403 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 20:11:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:57,440 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:11:57,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:11:57,441 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:11:57,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:57,442 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:11:57,442 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:11:57,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:11:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:11:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:11:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:11:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:11:57,449 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 20:11:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,449 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:11:57,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:11:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:11:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:11:57,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,451 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:57,662 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:57,663 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:57,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:57,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 20:11:57,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:57,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252931812] [2019-11-23 20:11:57,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:11:57,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252931812] [2019-11-23 20:11:57,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091388576] [2019-11-23 20:11:57,770 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:57,847 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:11:57,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:57,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:57,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:11:57,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:57,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:11:57,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674059106] [2019-11-23 20:11:57,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:11:57,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:57,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:11:57,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:11:57,876 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 20:11:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:57,936 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 20:11:57,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:11:57,940 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:11:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:57,940 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:11:57,941 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:11:57,942 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:11:57,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:11:57,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:11:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:11:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:11:57,956 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:11:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:57,956 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:11:57,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:11:57,956 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:11:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:11:57,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:57,959 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:58,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,160 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:58,161 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 20:11:58,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:58,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333731458] [2019-11-23 20:11:58,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:11:58,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333731458] [2019-11-23 20:11:58,237 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590320703] [2019-11-23 20:11:58,237 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:11:58,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:58,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:11:58,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:11:58,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:58,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:11:58,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720516967] [2019-11-23 20:11:58,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:11:58,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:58,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:11:58,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:11:58,340 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 20:11:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:58,446 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:11:58,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:11:58,447 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:11:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:58,448 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:11:58,448 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:11:58,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:11:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:11:58,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:11:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:11:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:11:58,463 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 20:11:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:58,466 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:11:58,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:11:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:11:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:11:58,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:58,468 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:58,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,673 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:58,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 20:11:58,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:58,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466155115] [2019-11-23 20:11:58,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:11:58,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466155115] [2019-11-23 20:11:58,780 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059015052] [2019-11-23 20:11:58,780 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:58,841 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:11:58,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:58,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:11:58,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:11:58,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:58,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:11:58,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524771190] [2019-11-23 20:11:58,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:11:58,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:58,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:11:58,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:11:58,882 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 20:11:59,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:59,023 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:11:59,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:11:59,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:11:59,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:59,024 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:11:59,025 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:11:59,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:11:59,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:11:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:11:59,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:11:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:11:59,043 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 20:11:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:59,043 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:11:59,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:11:59,044 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:11:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:11:59,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:59,046 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:59,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:59,247 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:59,247 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 20:11:59,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:59,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910060591] [2019-11-23 20:11:59,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:11:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:11:59,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910060591] [2019-11-23 20:11:59,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359183294] [2019-11-23 20:11:59,363 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:59,442 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:11:59,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:11:59,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:11:59,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:11:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 20:11:59,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:11:59,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:11:59,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88092143] [2019-11-23 20:11:59,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:11:59,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:11:59,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:11:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:59,502 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 20:11:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:11:59,618 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:11:59,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:11:59,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:11:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:11:59,619 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:11:59,619 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:11:59,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:11:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:11:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:11:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:11:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:11:59,627 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 20:11:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:11:59,627 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:11:59,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:11:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:11:59,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:11:59,628 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:11:59,629 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:11:59,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:11:59,833 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:11:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:11:59,833 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 20:11:59,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:11:59,834 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921838147] [2019-11-23 20:11:59,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:11:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:12:00,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921838147] [2019-11-23 20:12:00,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253648174] [2019-11-23 20:12:00,011 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:00,084 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:12:00,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:00,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:12:00,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:12:00,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:00,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 20:12:00,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456176800] [2019-11-23 20:12:00,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:12:00,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:00,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:12:00,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:12:00,125 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 20:12:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:00,182 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:12:00,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:12:00,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:12:00,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:00,183 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:12:00,183 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:12:00,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:12:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:12:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:12:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:12:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:12:00,193 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 20:12:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:00,193 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:12:00,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:12:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:12:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:12:00,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:00,194 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:00,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:00,407 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:00,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:00,407 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 20:12:00,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:00,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937488351] [2019-11-23 20:12:00,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:00,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:12:00,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937488351] [2019-11-23 20:12:00,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021518291] [2019-11-23 20:12:00,545 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:00,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:12:00,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:12:00,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:00,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:12:00,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393060725] [2019-11-23 20:12:00,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:12:00,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:00,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:12:00,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:12:00,666 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 20:12:00,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:00,716 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:12:00,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:12:00,717 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 20:12:00,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:00,717 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:12:00,718 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:12:00,719 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:12:00,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:12:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:12:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:12:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:12:00,731 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 20:12:00,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:00,732 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:12:00,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:12:00,732 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:12:00,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:12:00,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:00,733 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:00,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:00,941 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:00,941 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 20:12:00,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:00,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059168971] [2019-11-23 20:12:00,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:12:01,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059168971] [2019-11-23 20:12:01,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800627631] [2019-11-23 20:12:01,045 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:01,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:01,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:12:01,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:12:01,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:01,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:12:01,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411769084] [2019-11-23 20:12:01,146 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:12:01,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:01,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:12:01,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:12:01,147 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 20:12:01,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:01,182 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 20:12:01,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:12:01,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 20:12:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:01,183 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:12:01,184 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:12:01,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:12:01,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:12:01,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:12:01,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:12:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:12:01,200 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 20:12:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:01,200 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:12:01,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:12:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:12:01,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:12:01,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:01,202 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:01,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,403 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:01,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:01,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 20:12:01,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:01,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127937535] [2019-11-23 20:12:01,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:01,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:12:01,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127937535] [2019-11-23 20:12:01,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431608247] [2019-11-23 20:12:01,532 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:12:01,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:01,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:12:01,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 20:12:01,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:01,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:12:01,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292468677] [2019-11-23 20:12:01,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:12:01,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:01,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:12:01,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:12:01,651 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 20:12:01,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:01,727 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 20:12:01,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:12:01,727 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:12:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:01,728 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:12:01,728 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:12:01,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:12:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:12:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:12:01,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:12:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:12:01,735 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:12:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:01,735 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:12:01,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:12:01,735 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:12:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:12:01,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:01,737 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:01,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:01,937 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:01,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:01,938 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 20:12:01,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:01,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074407127] [2019-11-23 20:12:01,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:12:02,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074407127] [2019-11-23 20:12:02,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584557271] [2019-11-23 20:12:02,063 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:02,147 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:02,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:02,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:12:02,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:12:02,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:02,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:12:02,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442318072] [2019-11-23 20:12:02,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:12:02,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:12:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:12:02,175 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 20:12:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:02,224 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:12:02,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:12:02,224 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 20:12:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:02,225 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:12:02,225 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:12:02,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:12:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:12:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:12:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:12:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:12:02,231 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 20:12:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:02,231 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:12:02,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:12:02,232 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:12:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:12:02,232 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:02,233 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:02,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:02,441 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:02,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:02,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 20:12:02,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:02,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185759255] [2019-11-23 20:12:02,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:12:02,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185759255] [2019-11-23 20:12:02,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719301848] [2019-11-23 20:12:02,591 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:03,287 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:12:03,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:03,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:12:03,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:12:03,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:03,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 20:12:03,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197278769] [2019-11-23 20:12:03,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:12:03,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:03,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:12:03,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:12:03,359 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 20:12:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:03,493 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 20:12:03,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:12:03,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 20:12:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:03,494 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:12:03,494 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:12:03,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:12:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:12:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 20:12:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:12:03,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 20:12:03,508 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 20:12:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:03,508 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 20:12:03,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:12:03,508 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 20:12:03,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:12:03,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:03,510 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:03,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:03,711 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 20:12:03,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:03,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625264508] [2019-11-23 20:12:03,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:12:03,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625264508] [2019-11-23 20:12:03,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655598580] [2019-11-23 20:12:03,853 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:04,095 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:12:04,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:04,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:12:04,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 20:12:04,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:04,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:12:04,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760607413] [2019-11-23 20:12:04,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:12:04,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:04,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:12:04,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:12:04,189 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 20:12:04,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:04,261 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 20:12:04,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:12:04,262 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 20:12:04,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:04,262 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:12:04,263 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:12:04,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:12:04,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:12:04,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:12:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:12:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 20:12:04,268 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 20:12:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:04,268 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 20:12:04,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:12:04,269 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 20:12:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:12:04,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:04,270 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:04,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:04,474 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:04,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 20:12:04,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:04,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457422771] [2019-11-23 20:12:04,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:04,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457422771] [2019-11-23 20:12:04,619 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993349736] [2019-11-23 20:12:04,619 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:04,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:12:04,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:04,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:04,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:12:04,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319765832] [2019-11-23 20:12:04,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:12:04,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:04,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:12:04,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:12:04,705 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 20:12:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:04,758 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 20:12:04,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:12:04,763 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 20:12:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:04,764 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:12:04,764 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:12:04,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:12:04,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:12:04,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:12:04,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:12:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 20:12:04,769 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 20:12:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:04,769 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 20:12:04,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:12:04,770 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 20:12:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:12:04,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:04,771 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:04,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:04,974 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:04,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:04,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 20:12:04,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:04,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842156739] [2019-11-23 20:12:04,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:05,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842156739] [2019-11-23 20:12:05,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426852566] [2019-11-23 20:12:05,154 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:05,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:05,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:05,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:12:05,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:05,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:05,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:12:05,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225484642] [2019-11-23 20:12:05,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:12:05,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:05,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:12:05,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:12:05,279 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 20:12:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:05,336 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 20:12:05,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:12:05,337 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 20:12:05,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:05,338 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:12:05,338 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:12:05,339 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:12:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:12:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:12:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:12:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 20:12:05,343 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 20:12:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:05,344 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 20:12:05,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:12:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 20:12:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:12:05,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:05,345 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:05,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:05,549 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:05,550 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 20:12:05,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:05,550 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317930688] [2019-11-23 20:12:05,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:12:05,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317930688] [2019-11-23 20:12:05,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919882363] [2019-11-23 20:12:05,733 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:05,833 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:12:05,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:05,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:12:05,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:12:05,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:05,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:12:05,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99605987] [2019-11-23 20:12:05,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:12:05,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:05,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:12:05,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:05,930 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 20:12:06,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:06,049 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 20:12:06,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:12:06,049 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 20:12:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:06,050 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:12:06,050 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:12:06,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:06,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:12:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 20:12:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:12:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 20:12:06,054 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 20:12:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:06,055 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 20:12:06,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:12:06,055 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 20:12:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:12:06,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:06,056 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:06,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:06,257 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:06,258 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 20:12:06,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:06,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726690202] [2019-11-23 20:12:06,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 20:12:06,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726690202] [2019-11-23 20:12:06,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7157996] [2019-11-23 20:12:06,437 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:06,511 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:06,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:06,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:12:06,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 20:12:06,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:06,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 20:12:06,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661702385] [2019-11-23 20:12:06,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:12:06,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:12:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:12:06,637 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 20:12:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:06,851 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 20:12:06,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:12:06,851 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 20:12:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:06,853 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:12:06,853 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:12:06,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:12:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:12:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 20:12:06,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:12:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 20:12:06,860 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 20:12:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:06,860 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 20:12:06,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:12:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 20:12:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:12:06,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:06,862 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:07,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:07,070 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:07,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:07,071 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 20:12:07,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:07,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903346620] [2019-11-23 20:12:07,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:12:07,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903346620] [2019-11-23 20:12:07,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109074420] [2019-11-23 20:12:07,294 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:07,961 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:12:07,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:07,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:12:07,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 20:12:08,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:08,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 20:12:08,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480495738] [2019-11-23 20:12:08,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:12:08,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:12:08,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:08,076 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 20:12:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:08,330 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 20:12:08,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:12:08,331 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 20:12:08,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:08,332 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:12:08,332 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:12:08,333 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:12:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 20:12:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:12:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 20:12:08,337 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 20:12:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:08,337 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 20:12:08,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:12:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 20:12:08,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 20:12:08,338 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:08,338 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:08,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:08,548 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:08,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:08,549 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 20:12:08,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:08,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055364239] [2019-11-23 20:12:08,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:12:08,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055364239] [2019-11-23 20:12:08,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298311483] [2019-11-23 20:12:08,882 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:09,618 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:12:09,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:09,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:12:09,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 20:12:09,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:09,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 20:12:09,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988955992] [2019-11-23 20:12:09,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:12:09,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:09,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:12:09,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:09,737 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 20:12:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:09,841 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 20:12:09,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:12:09,842 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 20:12:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:09,843 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:12:09,843 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:12:09,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:12:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 20:12:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:12:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 20:12:09,848 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 20:12:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:09,848 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 20:12:09,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:12:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 20:12:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:12:09,849 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:09,849 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:10,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:10,058 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:10,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 20:12:10,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:10,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578133961] [2019-11-23 20:12:10,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:10,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578133961] [2019-11-23 20:12:10,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935818616] [2019-11-23 20:12:10,305 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:10,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:12:10,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:10,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:10,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:12:10,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792815988] [2019-11-23 20:12:10,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:12:10,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:10,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:12:10,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:12:10,423 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 20:12:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:10,503 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 20:12:10,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:12:10,505 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 20:12:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:10,505 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:12:10,506 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:12:10,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:12:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:12:10,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:12:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:12:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 20:12:10,510 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 20:12:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:10,511 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 20:12:10,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:12:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 20:12:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:12:10,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:10,512 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:10,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:10,715 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:10,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 20:12:10,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:10,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645437409] [2019-11-23 20:12:10,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:11,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645437409] [2019-11-23 20:12:11,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324403616] [2019-11-23 20:12:11,021 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:11,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:11,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:11,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:12:11,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:11,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:11,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:12:11,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307270380] [2019-11-23 20:12:11,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:12:11,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:11,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:12:11,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:11,125 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 20:12:11,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:11,217 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 20:12:11,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:12:11,218 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 20:12:11,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:11,219 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:12:11,219 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:12:11,219 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:12:11,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:12:11,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 20:12:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:12:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 20:12:11,225 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 20:12:11,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:11,225 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 20:12:11,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:12:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 20:12:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:12:11,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:11,226 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:11,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:11,427 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:11,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:11,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 20:12:11,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:11,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632139026] [2019-11-23 20:12:11,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:12:11,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632139026] [2019-11-23 20:12:11,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597511460] [2019-11-23 20:12:11,854 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:12,079 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:12:12,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:12,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:12:12,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 41 proven. 49 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-23 20:12:12,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:12,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2019-11-23 20:12:12,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003780683] [2019-11-23 20:12:12,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:12:12,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:12,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:12:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:12:12,434 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 35 states. [2019-11-23 20:12:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:13,609 INFO L93 Difference]: Finished difference Result 200 states and 212 transitions. [2019-11-23 20:12:13,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:12:13,610 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 115 [2019-11-23 20:12:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:13,611 INFO L225 Difference]: With dead ends: 200 [2019-11-23 20:12:13,611 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 20:12:13,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:12:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 20:12:13,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2019-11-23 20:12:13,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 20:12:13,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 20:12:13,619 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 115 [2019-11-23 20:12:13,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:13,619 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 20:12:13,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:12:13,619 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 20:12:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:12:13,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:13,620 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:13,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:13,824 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:13,825 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 22 times [2019-11-23 20:12:13,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:13,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833848961] [2019-11-23 20:12:13,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:14,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833848961] [2019-11-23 20:12:14,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760053178] [2019-11-23 20:12:14,165 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:14,251 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:14,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:14,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:12:14,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:14,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:14,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:12:14,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694683617] [2019-11-23 20:12:14,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:12:14,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:14,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:12:14,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:14,292 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 27 states. [2019-11-23 20:12:14,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:14,371 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2019-11-23 20:12:14,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:12:14,371 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 125 [2019-11-23 20:12:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:14,372 INFO L225 Difference]: With dead ends: 206 [2019-11-23 20:12:14,372 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 20:12:14,373 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:12:14,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 20:12:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-11-23 20:12:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 20:12:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2019-11-23 20:12:14,377 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 125 [2019-11-23 20:12:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:14,378 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2019-11-23 20:12:14,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:12:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2019-11-23 20:12:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 20:12:14,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:14,379 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:14,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:14,582 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:14,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:14,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 23 times [2019-11-23 20:12:14,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:14,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316001196] [2019-11-23 20:12:14,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:15,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316001196] [2019-11-23 20:12:15,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545860513] [2019-11-23 20:12:15,024 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:18,325 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 20:12:18,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:18,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:12:18,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:18,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:18,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:12:18,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778876797] [2019-11-23 20:12:18,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:12:18,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:18,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:12:18,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:18,389 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2019-11-23 20:12:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:18,462 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2019-11-23 20:12:18,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:12:18,463 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2019-11-23 20:12:18,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:18,464 INFO L225 Difference]: With dead ends: 208 [2019-11-23 20:12:18,464 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 20:12:18,464 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:12:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 20:12:18,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-11-23 20:12:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-23 20:12:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2019-11-23 20:12:18,470 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2019-11-23 20:12:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:18,471 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2019-11-23 20:12:18,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:12:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2019-11-23 20:12:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 20:12:18,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:18,472 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:18,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:18,675 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:18,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 24 times [2019-11-23 20:12:18,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:18,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201544702] [2019-11-23 20:12:18,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:12:19,170 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201544702] [2019-11-23 20:12:19,171 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123552204] [2019-11-23 20:12:19,171 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:20,338 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:12:20,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:20,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:12:20,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2019-11-23 20:12:20,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:20,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-23 20:12:20,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768884770] [2019-11-23 20:12:20,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:12:20,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:20,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:12:20,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:20,510 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 36 states. [2019-11-23 20:12:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:20,645 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2019-11-23 20:12:20,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:12:20,645 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 129 [2019-11-23 20:12:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:20,646 INFO L225 Difference]: With dead ends: 213 [2019-11-23 20:12:20,646 INFO L226 Difference]: Without dead ends: 136 [2019-11-23 20:12:20,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-23 20:12:20,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2019-11-23 20:12:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:12:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 20:12:20,652 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 129 [2019-11-23 20:12:20,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:20,653 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 20:12:20,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:12:20,653 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 20:12:20,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:12:20,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:20,654 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:20,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:20,859 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:20,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:20,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2138537200, now seen corresponding path program 25 times [2019-11-23 20:12:20,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:20,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345346947] [2019-11-23 20:12:20,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:21,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345346947] [2019-11-23 20:12:21,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884307952] [2019-11-23 20:12:21,432 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:21,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:12:21,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:21,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:21,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:12:21,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065432842] [2019-11-23 20:12:21,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:12:21,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:21,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:12:21,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:12:21,605 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 30 states. [2019-11-23 20:12:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:21,735 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2019-11-23 20:12:21,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:12:21,736 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 133 [2019-11-23 20:12:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:21,737 INFO L225 Difference]: With dead ends: 216 [2019-11-23 20:12:21,737 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 20:12:21,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:12:21,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 20:12:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2019-11-23 20:12:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-23 20:12:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2019-11-23 20:12:21,745 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2019-11-23 20:12:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:21,746 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2019-11-23 20:12:21,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:12:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2019-11-23 20:12:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 20:12:21,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:21,747 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:21,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:21,952 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:21,952 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 26 times [2019-11-23 20:12:21,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:21,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333703850] [2019-11-23 20:12:21,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:22,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333703850] [2019-11-23 20:12:22,539 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607466437] [2019-11-23 20:12:22,539 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:22,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:22,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:22,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:12:22,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:22,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:22,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:12:22,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254006683] [2019-11-23 20:12:22,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:12:22,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:22,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:12:22,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:12:22,669 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2019-11-23 20:12:22,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:22,767 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2019-11-23 20:12:22,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:12:22,767 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2019-11-23 20:12:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:22,768 INFO L225 Difference]: With dead ends: 218 [2019-11-23 20:12:22,768 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 20:12:22,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:12:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 20:12:22,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-11-23 20:12:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:12:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 20:12:22,775 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2019-11-23 20:12:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:22,775 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 20:12:22,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:12:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 20:12:22,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:12:22,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:22,776 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:22,979 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:22,980 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:22,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 27 times [2019-11-23 20:12:22,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:22,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525563788] [2019-11-23 20:12:22,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:12:23,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525563788] [2019-11-23 20:12:23,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569156377] [2019-11-23 20:12:23,529 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:23,750 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:12:23,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:23,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:12:23,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2019-11-23 20:12:23,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:23,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-11-23 20:12:23,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631171134] [2019-11-23 20:12:23,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:12:23,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:23,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:12:23,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:12:23,932 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2019-11-23 20:12:24,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:24,277 INFO L93 Difference]: Finished difference Result 229 states and 240 transitions. [2019-11-23 20:12:24,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:12:24,278 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2019-11-23 20:12:24,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:24,279 INFO L225 Difference]: With dead ends: 229 [2019-11-23 20:12:24,279 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 20:12:24,281 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:12:24,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 20:12:24,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2019-11-23 20:12:24,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:12:24,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 20:12:24,287 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 137 [2019-11-23 20:12:24,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:24,288 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 20:12:24,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:12:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 20:12:24,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:12:24,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:24,289 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:24,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:24,493 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:24,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:24,494 INFO L82 PathProgramCache]: Analyzing trace with hash -870144824, now seen corresponding path program 28 times [2019-11-23 20:12:24,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:24,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249348172] [2019-11-23 20:12:24,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:24,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249348172] [2019-11-23 20:12:24,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926343896] [2019-11-23 20:12:24,986 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:25,084 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:25,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:25,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:12:25,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:25,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:25,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:12:25,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863956402] [2019-11-23 20:12:25,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:12:25,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:25,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:12:25,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:12:25,139 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 33 states. [2019-11-23 20:12:25,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:25,238 INFO L93 Difference]: Finished difference Result 234 states and 242 transitions. [2019-11-23 20:12:25,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:12:25,239 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 145 [2019-11-23 20:12:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:25,240 INFO L225 Difference]: With dead ends: 234 [2019-11-23 20:12:25,240 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:12:25,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:12:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:12:25,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 20:12:25,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:12:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 20:12:25,247 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2019-11-23 20:12:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:25,247 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 20:12:25,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:12:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 20:12:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:12:25,248 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:25,249 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:25,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:25,453 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:25,453 INFO L82 PathProgramCache]: Analyzing trace with hash 922342406, now seen corresponding path program 29 times [2019-11-23 20:12:25,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:25,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737597459] [2019-11-23 20:12:25,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:12:26,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737597459] [2019-11-23 20:12:26,128 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355055241] [2019-11-23 20:12:26,128 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:38,801 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-11-23 20:12:38,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:38,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:12:38,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1126 trivial. 0 not checked. [2019-11-23 20:12:39,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:39,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-23 20:12:39,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757565697] [2019-11-23 20:12:39,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:12:39,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:39,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:12:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:12:39,022 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 43 states. [2019-11-23 20:12:39,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:39,500 INFO L93 Difference]: Finished difference Result 245 states and 256 transitions. [2019-11-23 20:12:39,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:12:39,501 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 147 [2019-11-23 20:12:39,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:39,502 INFO L225 Difference]: With dead ends: 245 [2019-11-23 20:12:39,502 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:12:39,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:12:39,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:12:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2019-11-23 20:12:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 20:12:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 20:12:39,511 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2019-11-23 20:12:39,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:39,511 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 20:12:39,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:12:39,511 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 20:12:39,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 20:12:39,512 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:39,512 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:39,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:39,722 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:39,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:39,723 INFO L82 PathProgramCache]: Analyzing trace with hash -907854910, now seen corresponding path program 30 times [2019-11-23 20:12:39,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:39,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695700] [2019-11-23 20:12:39,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2019-11-23 20:12:40,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695700] [2019-11-23 20:12:40,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655744417] [2019-11-23 20:12:40,339 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:41,391 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 20:12:41,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:41,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:12:41,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1325 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2019-11-23 20:12:41,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:41,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 11] total 43 [2019-11-23 20:12:41,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887995174] [2019-11-23 20:12:41,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:12:41,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:41,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:12:41,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:12:41,613 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 43 states. [2019-11-23 20:12:41,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:41,857 INFO L93 Difference]: Finished difference Result 253 states and 262 transitions. [2019-11-23 20:12:41,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:12:41,857 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 155 [2019-11-23 20:12:41,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:41,858 INFO L225 Difference]: With dead ends: 253 [2019-11-23 20:12:41,858 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:12:41,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=615, Invalid=1191, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:12:41,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:12:41,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-11-23 20:12:41,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:12:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 20:12:41,867 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 155 [2019-11-23 20:12:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:41,867 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 20:12:41,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:12:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 20:12:41,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:12:41,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:41,869 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:42,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:42,074 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:42,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:42,075 INFO L82 PathProgramCache]: Analyzing trace with hash -629222402, now seen corresponding path program 31 times [2019-11-23 20:12:42,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:42,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935564962] [2019-11-23 20:12:42,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:42,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935564962] [2019-11-23 20:12:42,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562187262] [2019-11-23 20:12:42,653 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:42,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:12:42,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:42,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:42,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:12:42,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079699467] [2019-11-23 20:12:42,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:12:42,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:42,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:12:42,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:42,777 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 36 states. [2019-11-23 20:12:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:42,904 INFO L93 Difference]: Finished difference Result 256 states and 264 transitions. [2019-11-23 20:12:42,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:12:42,907 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 159 [2019-11-23 20:12:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:42,908 INFO L225 Difference]: With dead ends: 256 [2019-11-23 20:12:42,908 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:12:42,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:12:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:12:42,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:12:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:12:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 20:12:42,915 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 20:12:42,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:42,916 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 20:12:42,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:12:42,916 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 20:12:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:12:42,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:42,917 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:43,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:43,120 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 32 times [2019-11-23 20:12:43,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:43,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921413259] [2019-11-23 20:12:43,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:43,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921413259] [2019-11-23 20:12:43,756 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613024888] [2019-11-23 20:12:43,756 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:43,853 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:12:43,853 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:43,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:12:43,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:43,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:43,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:12:43,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412921372] [2019-11-23 20:12:43,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:12:43,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:43,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:12:43,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:12:43,889 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 37 states. [2019-11-23 20:12:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:44,029 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-11-23 20:12:44,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:12:44,034 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 161 [2019-11-23 20:12:44,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:44,035 INFO L225 Difference]: With dead ends: 258 [2019-11-23 20:12:44,035 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:12:44,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:12:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:12:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 20:12:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:12:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 20:12:44,042 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2019-11-23 20:12:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:44,042 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 20:12:44,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:12:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 20:12:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 20:12:44,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:44,044 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:44,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:44,247 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:44,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:44,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1569164806, now seen corresponding path program 33 times [2019-11-23 20:12:44,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:44,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883203275] [2019-11-23 20:12:44,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:12:44,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883203275] [2019-11-23 20:12:44,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486145434] [2019-11-23 20:12:44,870 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:45,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:12:45,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:45,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:12:45,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1456 trivial. 0 not checked. [2019-11-23 20:12:45,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:45,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 12] total 47 [2019-11-23 20:12:45,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374314342] [2019-11-23 20:12:45,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:12:45,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:45,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:12:45,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:12:45,352 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 47 states. [2019-11-23 20:12:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:45,587 INFO L93 Difference]: Finished difference Result 263 states and 272 transitions. [2019-11-23 20:12:45,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:12:45,589 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2019-11-23 20:12:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:45,589 INFO L225 Difference]: With dead ends: 263 [2019-11-23 20:12:45,589 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 20:12:45,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=731, Invalid=1431, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:12:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 20:12:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2019-11-23 20:12:45,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-11-23 20:12:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2019-11-23 20:12:45,594 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 163 [2019-11-23 20:12:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:45,594 INFO L462 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2019-11-23 20:12:45,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:12:45,595 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2019-11-23 20:12:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-23 20:12:45,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:45,595 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:45,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:45,796 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:45,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:45,797 INFO L82 PathProgramCache]: Analyzing trace with hash -338674122, now seen corresponding path program 34 times [2019-11-23 20:12:45,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:45,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404411580] [2019-11-23 20:12:45,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:12:46,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404411580] [2019-11-23 20:12:46,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008191842] [2019-11-23 20:12:46,371 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:46,490 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:12:46,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:12:46,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:12:46,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:12:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2019-11-23 20:12:46,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:12:46,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 13] total 49 [2019-11-23 20:12:46,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008331338] [2019-11-23 20:12:46,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:12:46,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:12:46,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:12:46,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:12:46,759 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 49 states. [2019-11-23 20:12:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:12:47,085 INFO L93 Difference]: Finished difference Result 275 states and 286 transitions. [2019-11-23 20:12:47,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:12:47,085 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 167 [2019-11-23 20:12:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:12:47,086 INFO L225 Difference]: With dead ends: 275 [2019-11-23 20:12:47,087 INFO L226 Difference]: Without dead ends: 180 [2019-11-23 20:12:47,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=1572, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:12:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-23 20:12:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2019-11-23 20:12:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-23 20:12:47,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2019-11-23 20:12:47,094 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 167 [2019-11-23 20:12:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:12:47,094 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2019-11-23 20:12:47,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:12:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2019-11-23 20:12:47,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 20:12:47,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:12:47,095 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:12:47,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:12:47,299 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:12:47,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:12:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1357540110, now seen corresponding path program 35 times [2019-11-23 20:12:47,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:12:47,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221989519] [2019-11-23 20:12:47,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:12:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:12:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:12:47,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221989519] [2019-11-23 20:12:47,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316667904] [2019-11-23 20:12:47,895 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:09,249 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-11-23 20:13:09,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:09,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:13:09,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1638 trivial. 0 not checked. [2019-11-23 20:13:09,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:09,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 14] total 51 [2019-11-23 20:13:09,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990038734] [2019-11-23 20:13:09,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:13:09,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:09,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:13:09,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=1719, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:13:09,528 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 51 states. [2019-11-23 20:13:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:09,944 INFO L93 Difference]: Finished difference Result 289 states and 300 transitions. [2019-11-23 20:13:09,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:13:09,944 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 175 [2019-11-23 20:13:09,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:09,945 INFO L225 Difference]: With dead ends: 289 [2019-11-23 20:13:09,946 INFO L226 Difference]: Without dead ends: 188 [2019-11-23 20:13:09,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=831, Invalid=1719, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:13:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-11-23 20:13:09,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2019-11-23 20:13:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-11-23 20:13:09,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2019-11-23 20:13:09,953 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 175 [2019-11-23 20:13:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:09,954 INFO L462 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2019-11-23 20:13:09,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:13:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2019-11-23 20:13:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 20:13:09,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:09,955 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:10,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:10,169 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:10,169 INFO L82 PathProgramCache]: Analyzing trace with hash 45772974, now seen corresponding path program 36 times [2019-11-23 20:13:10,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:10,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664870458] [2019-11-23 20:13:10,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:13:10,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664870458] [2019-11-23 20:13:10,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712743743] [2019-11-23 20:13:10,828 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:12,418 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-11-23 20:13:12,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:12,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:13:12,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1801 trivial. 0 not checked. [2019-11-23 20:13:12,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:12,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13] total 51 [2019-11-23 20:13:12,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034582806] [2019-11-23 20:13:12,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:13:12,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:12,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:13:12,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:13:12,862 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 51 states. [2019-11-23 20:13:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:13,165 INFO L93 Difference]: Finished difference Result 297 states and 306 transitions. [2019-11-23 20:13:13,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:13:13,165 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 183 [2019-11-23 20:13:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:13,167 INFO L225 Difference]: With dead ends: 297 [2019-11-23 20:13:13,167 INFO L226 Difference]: Without dead ends: 190 [2019-11-23 20:13:13,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=857, Invalid=1693, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:13:13,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-23 20:13:13,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2019-11-23 20:13:13,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 20:13:13,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2019-11-23 20:13:13,177 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 183 [2019-11-23 20:13:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:13,178 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2019-11-23 20:13:13,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:13:13,178 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2019-11-23 20:13:13,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-23 20:13:13,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:13,180 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:13,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:13,388 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:13,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:13,388 INFO L82 PathProgramCache]: Analyzing trace with hash 611628266, now seen corresponding path program 37 times [2019-11-23 20:13:13,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:13,389 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257998497] [2019-11-23 20:13:13,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 20:13:14,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257998497] [2019-11-23 20:13:14,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241728971] [2019-11-23 20:13:14,098 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:14,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:13:14,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1997 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 20:13:14,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:14,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:13:14,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691862830] [2019-11-23 20:13:14,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:13:14,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:14,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:13:14,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:13:14,264 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand 42 states. [2019-11-23 20:13:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:14,391 INFO L93 Difference]: Finished difference Result 300 states and 308 transitions. [2019-11-23 20:13:14,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:13:14,392 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 187 [2019-11-23 20:13:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:14,393 INFO L225 Difference]: With dead ends: 300 [2019-11-23 20:13:14,393 INFO L226 Difference]: Without dead ends: 191 [2019-11-23 20:13:14,393 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:13:14,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-23 20:13:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-11-23 20:13:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-23 20:13:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2019-11-23 20:13:14,398 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 187 [2019-11-23 20:13:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:14,398 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2019-11-23 20:13:14,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:13:14,398 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2019-11-23 20:13:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-23 20:13:14,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:14,399 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:14,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:14,603 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:14,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:14,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1682311512, now seen corresponding path program 38 times [2019-11-23 20:13:14,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:14,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028240400] [2019-11-23 20:13:14,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 20:13:15,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028240400] [2019-11-23 20:13:15,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455771646] [2019-11-23 20:13:15,664 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:15,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:15,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:15,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:13:15,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 20:13:15,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:15,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 20:13:15,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185340825] [2019-11-23 20:13:15,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:13:15,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:15,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:13:15,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:13:15,841 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 43 states. [2019-11-23 20:13:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:15,997 INFO L93 Difference]: Finished difference Result 302 states and 310 transitions. [2019-11-23 20:13:15,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:13:15,997 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 189 [2019-11-23 20:13:15,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:15,998 INFO L225 Difference]: With dead ends: 302 [2019-11-23 20:13:15,998 INFO L226 Difference]: Without dead ends: 193 [2019-11-23 20:13:15,998 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:13:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-23 20:13:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2019-11-23 20:13:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-23 20:13:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2019-11-23 20:13:16,004 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 189 [2019-11-23 20:13:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:16,004 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2019-11-23 20:13:16,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:13:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2019-11-23 20:13:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-23 20:13:16,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:16,006 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:16,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:16,209 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:16,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1454751974, now seen corresponding path program 39 times [2019-11-23 20:13:16,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:16,210 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515310037] [2019-11-23 20:13:16,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2019-11-23 20:13:16,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515310037] [2019-11-23 20:13:16,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569425485] [2019-11-23 20:13:16,932 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:17,639 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:13:17,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:17,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:13:17,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2019-11-23 20:13:17,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:17,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 55 [2019-11-23 20:13:17,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466956076] [2019-11-23 20:13:17,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 20:13:17,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:17,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 20:13:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:13:17,932 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 55 states. [2019-11-23 20:13:18,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:18,294 INFO L93 Difference]: Finished difference Result 307 states and 316 transitions. [2019-11-23 20:13:18,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 20:13:18,295 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 191 [2019-11-23 20:13:18,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:18,296 INFO L225 Difference]: With dead ends: 307 [2019-11-23 20:13:18,296 INFO L226 Difference]: Without dead ends: 198 [2019-11-23 20:13:18,297 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=993, Invalid=1977, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:13:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-11-23 20:13:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2019-11-23 20:13:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 20:13:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 200 transitions. [2019-11-23 20:13:18,302 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 200 transitions. Word has length 191 [2019-11-23 20:13:18,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:18,302 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 200 transitions. [2019-11-23 20:13:18,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 20:13:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 200 transitions. [2019-11-23 20:13:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-23 20:13:18,304 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:18,304 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:18,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:18,505 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:18,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1338423586, now seen corresponding path program 40 times [2019-11-23 20:13:18,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:18,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586692998] [2019-11-23 20:13:18,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-11-23 20:13:19,747 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586692998] [2019-11-23 20:13:19,748 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091972752] [2019-11-23 20:13:19,748 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:19,888 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:19,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:19,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:13:19,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2257 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2113 trivial. 0 not checked. [2019-11-23 20:13:20,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:20,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 15] total 57 [2019-11-23 20:13:20,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258171381] [2019-11-23 20:13:20,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 20:13:20,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 20:13:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=2142, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 20:13:20,277 INFO L87 Difference]: Start difference. First operand 196 states and 200 transitions. Second operand 57 states. [2019-11-23 20:13:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:20,560 INFO L93 Difference]: Finished difference Result 313 states and 322 transitions. [2019-11-23 20:13:20,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-23 20:13:20,560 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 195 [2019-11-23 20:13:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:20,561 INFO L225 Difference]: With dead ends: 313 [2019-11-23 20:13:20,561 INFO L226 Difference]: Without dead ends: 202 [2019-11-23 20:13:20,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1050, Invalid=2142, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 20:13:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-23 20:13:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-11-23 20:13:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-23 20:13:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2019-11-23 20:13:20,570 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 195 [2019-11-23 20:13:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:20,570 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2019-11-23 20:13:20,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-23 20:13:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2019-11-23 20:13:20,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 20:13:20,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:20,572 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:20,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:20,776 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:20,776 INFO L82 PathProgramCache]: Analyzing trace with hash -651246754, now seen corresponding path program 41 times [2019-11-23 20:13:20,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:20,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568695774] [2019-11-23 20:13:20,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2365 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2019-11-23 20:13:21,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568695774] [2019-11-23 20:13:21,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484355861] [2019-11-23 20:13:21,606 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true