java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label28_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 18:20:01,725 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 18:20:01,727 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 18:20:01,739 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 18:20:01,740 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 18:20:01,741 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 18:20:01,742 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 18:20:01,744 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 18:20:01,745 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 18:20:01,746 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 18:20:01,747 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 18:20:01,747 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 18:20:01,748 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 18:20:01,749 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 18:20:01,751 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 18:20:01,751 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 18:20:01,752 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 18:20:01,754 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 18:20:01,756 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 18:20:01,758 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 18:20:01,759 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 18:20:01,760 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 18:20:01,763 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 18:20:01,763 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 18:20:01,763 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 18:20:01,764 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 18:20:01,765 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 18:20:01,766 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 18:20:01,767 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 18:20:01,768 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 18:20:01,769 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 18:20:01,769 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-06 18:20:01,772 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 18:20:01,787 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 18:20:01,788 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 18:20:01,789 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 18:20:01,789 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 18:20:01,790 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 18:20:01,790 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 18:20:01,790 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 18:20:01,790 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 18:20:01,791 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 18:20:01,791 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 18:20:01,791 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 18:20:01,791 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 18:20:01,791 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 18:20:01,792 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 18:20:01,792 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 18:20:01,792 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 18:20:01,792 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 18:20:01,792 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 18:20:01,793 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 18:20:01,793 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 18:20:01,793 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 18:20:01,793 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 18:20:01,793 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 18:20:01,794 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 18:20:01,794 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 18:20:01,794 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 18:20:01,794 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 18:20:01,794 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 18:20:01,840 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 18:20:01,853 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 18:20:01,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 18:20:01,858 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 18:20:01,859 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 18:20:01,860 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label28_false-unreach-call.c [2018-11-06 18:20:01,919 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1018d1fb9/5c76e41fef454e83963898ff53f6ce8d/FLAG750dc220c [2018-11-06 18:20:02,601 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 18:20:02,603 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label28_false-unreach-call.c [2018-11-06 18:20:02,625 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1018d1fb9/5c76e41fef454e83963898ff53f6ce8d/FLAG750dc220c [2018-11-06 18:20:02,647 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1018d1fb9/5c76e41fef454e83963898ff53f6ce8d [2018-11-06 18:20:02,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 18:20:02,661 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 18:20:02,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 18:20:02,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 18:20:02,667 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 18:20:02,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:20:02" (1/1) ... [2018-11-06 18:20:02,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59271772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:02, skipping insertion in model container [2018-11-06 18:20:02,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:20:02" (1/1) ... [2018-11-06 18:20:02,682 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 18:20:02,781 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 18:20:03,608 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 18:20:03,615 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 18:20:04,024 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 18:20:04,051 INFO L193 MainTranslator]: Completed translation [2018-11-06 18:20:04,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04 WrapperNode [2018-11-06 18:20:04,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 18:20:04,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 18:20:04,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 18:20:04,053 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 18:20:04,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04" (1/1) ... [2018-11-06 18:20:04,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04" (1/1) ... [2018-11-06 18:20:04,349 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 18:20:04,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 18:20:04,349 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 18:20:04,350 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 18:20:04,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04" (1/1) ... [2018-11-06 18:20:04,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04" (1/1) ... [2018-11-06 18:20:04,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04" (1/1) ... [2018-11-06 18:20:04,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04" (1/1) ... [2018-11-06 18:20:04,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04" (1/1) ... [2018-11-06 18:20:04,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04" (1/1) ... [2018-11-06 18:20:04,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04" (1/1) ... [2018-11-06 18:20:04,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 18:20:04,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 18:20:04,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 18:20:04,500 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 18:20:04,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 18:20:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-11-06 18:20:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 18:20:04,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 18:20:10,090 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 18:20:10,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:20:10 BoogieIcfgContainer [2018-11-06 18:20:10,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 18:20:10,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 18:20:10,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 18:20:10,096 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 18:20:10,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:20:02" (1/3) ... [2018-11-06 18:20:10,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787cf853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:20:10, skipping insertion in model container [2018-11-06 18:20:10,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:20:04" (2/3) ... [2018-11-06 18:20:10,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787cf853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:20:10, skipping insertion in model container [2018-11-06 18:20:10,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:20:10" (3/3) ... [2018-11-06 18:20:10,100 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label28_false-unreach-call.c [2018-11-06 18:20:10,111 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 18:20:10,119 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 18:20:10,137 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 18:20:10,176 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 18:20:10,177 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 18:20:10,177 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 18:20:10,178 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 18:20:10,178 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 18:20:10,178 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 18:20:10,178 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 18:20:10,178 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 18:20:10,179 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 18:20:10,205 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2018-11-06 18:20:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-11-06 18:20:10,225 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:20:10,226 INFO L375 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 18:20:10,229 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:20:10,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:20:10,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1324610274, now seen corresponding path program 1 times [2018-11-06 18:20:10,237 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:20:10,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:20:10,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:10,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:10,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:11,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 18:20:11,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:20:11,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 18:20:11,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 18:20:11,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 18:20:11,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:20:11,211 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 4 states. [2018-11-06 18:20:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:20:15,317 INFO L93 Difference]: Finished difference Result 1027 states and 1865 transitions. [2018-11-06 18:20:15,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 18:20:15,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2018-11-06 18:20:15,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:20:15,344 INFO L225 Difference]: With dead ends: 1027 [2018-11-06 18:20:15,345 INFO L226 Difference]: Without dead ends: 717 [2018-11-06 18:20:15,350 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:20:15,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2018-11-06 18:20:15,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2018-11-06 18:20:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 715 states. [2018-11-06 18:20:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1145 transitions. [2018-11-06 18:20:15,457 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1145 transitions. Word has length 153 [2018-11-06 18:20:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:20:15,458 INFO L480 AbstractCegarLoop]: Abstraction has 715 states and 1145 transitions. [2018-11-06 18:20:15,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 18:20:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1145 transitions. [2018-11-06 18:20:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-11-06 18:20:15,466 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:20:15,466 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 18:20:15,470 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:20:15,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:20:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash 729772227, now seen corresponding path program 1 times [2018-11-06 18:20:15,471 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:20:15,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:20:15,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:15,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:15,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 18:20:15,595 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:20:15,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 18:20:15,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 18:20:15,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 18:20:15,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 18:20:15,598 INFO L87 Difference]: Start difference. First operand 715 states and 1145 transitions. Second operand 3 states. [2018-11-06 18:20:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:20:17,229 INFO L93 Difference]: Finished difference Result 2058 states and 3347 transitions. [2018-11-06 18:20:17,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 18:20:17,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2018-11-06 18:20:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:20:17,239 INFO L225 Difference]: With dead ends: 2058 [2018-11-06 18:20:17,239 INFO L226 Difference]: Without dead ends: 1345 [2018-11-06 18:20:17,243 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 18:20:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2018-11-06 18:20:17,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1331. [2018-11-06 18:20:17,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2018-11-06 18:20:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2076 transitions. [2018-11-06 18:20:17,281 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2076 transitions. Word has length 162 [2018-11-06 18:20:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:20:17,281 INFO L480 AbstractCegarLoop]: Abstraction has 1331 states and 2076 transitions. [2018-11-06 18:20:17,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 18:20:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2076 transitions. [2018-11-06 18:20:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-11-06 18:20:17,285 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:20:17,285 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 18:20:17,286 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:20:17,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:20:17,286 INFO L82 PathProgramCache]: Analyzing trace with hash -292716689, now seen corresponding path program 1 times [2018-11-06 18:20:17,286 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:20:17,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:20:17,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:17,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:17,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-06 18:20:17,545 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:20:17,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 18:20:17,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 18:20:17,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 18:20:17,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 18:20:17,547 INFO L87 Difference]: Start difference. First operand 1331 states and 2076 transitions. Second operand 3 states. [2018-11-06 18:20:21,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:20:21,105 INFO L93 Difference]: Finished difference Result 3891 states and 6117 transitions. [2018-11-06 18:20:21,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 18:20:21,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 170 [2018-11-06 18:20:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:20:21,120 INFO L225 Difference]: With dead ends: 3891 [2018-11-06 18:20:21,120 INFO L226 Difference]: Without dead ends: 2562 [2018-11-06 18:20:21,123 INFO L604 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 [2018-11-06 18:20:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2018-11-06 18:20:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2557. [2018-11-06 18:20:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2557 states. [2018-11-06 18:20:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 3774 transitions. [2018-11-06 18:20:21,174 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 3774 transitions. Word has length 170 [2018-11-06 18:20:21,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:20:21,175 INFO L480 AbstractCegarLoop]: Abstraction has 2557 states and 3774 transitions. [2018-11-06 18:20:21,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 18:20:21,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 3774 transitions. [2018-11-06 18:20:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-11-06 18:20:21,181 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:20:21,181 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 1, 1, 1] [2018-11-06 18:20:21,182 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:20:21,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:20:21,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2000314268, now seen corresponding path program 1 times [2018-11-06 18:20:21,182 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:20:21,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:20:21,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:21,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:21,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 18:20:21,372 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:20:21,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 18:20:21,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 18:20:21,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 18:20:21,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 18:20:21,374 INFO L87 Difference]: Start difference. First operand 2557 states and 3774 transitions. Second operand 3 states. [2018-11-06 18:20:22,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:20:22,686 INFO L93 Difference]: Finished difference Result 6396 states and 9368 transitions. [2018-11-06 18:20:22,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 18:20:22,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 182 [2018-11-06 18:20:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:20:22,707 INFO L225 Difference]: With dead ends: 6396 [2018-11-06 18:20:22,707 INFO L226 Difference]: Without dead ends: 3841 [2018-11-06 18:20:22,711 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 18:20:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2018-11-06 18:20:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3837. [2018-11-06 18:20:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3837 states. [2018-11-06 18:20:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3837 states to 3837 states and 5572 transitions. [2018-11-06 18:20:22,799 INFO L78 Accepts]: Start accepts. Automaton has 3837 states and 5572 transitions. Word has length 182 [2018-11-06 18:20:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:20:22,800 INFO L480 AbstractCegarLoop]: Abstraction has 3837 states and 5572 transitions. [2018-11-06 18:20:22,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 18:20:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3837 states and 5572 transitions. [2018-11-06 18:20:22,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-11-06 18:20:22,809 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:20:22,809 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 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, 1, 1, 1] [2018-11-06 18:20:22,810 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:20:22,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:20:22,810 INFO L82 PathProgramCache]: Analyzing trace with hash -75866040, now seen corresponding path program 1 times [2018-11-06 18:20:22,810 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:20:22,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:20:22,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:22,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:22,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:23,244 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-06 18:20:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 18:20:23,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 18:20:23,416 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 18:20:23,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:23,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 18:20:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-06 18:20:23,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 18:20:23,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-11-06 18:20:23,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-06 18:20:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-06 18:20:23,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-06 18:20:23,724 INFO L87 Difference]: Start difference. First operand 3837 states and 5572 transitions. Second operand 6 states. [2018-11-06 18:20:29,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:20:29,860 INFO L93 Difference]: Finished difference Result 24481 states and 35515 transitions. [2018-11-06 18:20:29,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 18:20:29,861 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 190 [2018-11-06 18:20:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:20:29,945 INFO L225 Difference]: With dead ends: 24481 [2018-11-06 18:20:29,946 INFO L226 Difference]: Without dead ends: 20646 [2018-11-06 18:20:29,958 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-11-06 18:20:29,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20646 states. [2018-11-06 18:20:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20646 to 20571. [2018-11-06 18:20:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20571 states. [2018-11-06 18:20:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20571 states to 20571 states and 27034 transitions. [2018-11-06 18:20:30,477 INFO L78 Accepts]: Start accepts. Automaton has 20571 states and 27034 transitions. Word has length 190 [2018-11-06 18:20:30,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:20:30,477 INFO L480 AbstractCegarLoop]: Abstraction has 20571 states and 27034 transitions. [2018-11-06 18:20:30,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-06 18:20:30,477 INFO L276 IsEmpty]: Start isEmpty. Operand 20571 states and 27034 transitions. [2018-11-06 18:20:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-11-06 18:20:30,512 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:20:30,512 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1] [2018-11-06 18:20:30,512 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:20:30,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:20:30,513 INFO L82 PathProgramCache]: Analyzing trace with hash -441917383, now seen corresponding path program 1 times [2018-11-06 18:20:30,513 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:20:30,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:20:30,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:30,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:30,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-11-06 18:20:30,775 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:20:30,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 18:20:30,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 18:20:30,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 18:20:30,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:20:30,776 INFO L87 Difference]: Start difference. First operand 20571 states and 27034 transitions. Second operand 4 states. [2018-11-06 18:20:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:20:33,221 INFO L93 Difference]: Finished difference Result 74750 states and 98801 transitions. [2018-11-06 18:20:33,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 18:20:33,221 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2018-11-06 18:20:33,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:20:33,344 INFO L225 Difference]: With dead ends: 74750 [2018-11-06 18:20:33,344 INFO L226 Difference]: Without dead ends: 54181 [2018-11-06 18:20:33,377 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:20:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54181 states. [2018-11-06 18:20:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54181 to 37932. [2018-11-06 18:20:33,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37932 states. [2018-11-06 18:20:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37932 states to 37932 states and 48172 transitions. [2018-11-06 18:20:33,953 INFO L78 Accepts]: Start accepts. Automaton has 37932 states and 48172 transitions. Word has length 221 [2018-11-06 18:20:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:20:33,953 INFO L480 AbstractCegarLoop]: Abstraction has 37932 states and 48172 transitions. [2018-11-06 18:20:33,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 18:20:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 37932 states and 48172 transitions. [2018-11-06 18:20:34,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-11-06 18:20:34,005 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:20:34,006 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1] [2018-11-06 18:20:34,006 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:20:34,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:20:34,007 INFO L82 PathProgramCache]: Analyzing trace with hash 703323991, now seen corresponding path program 1 times [2018-11-06 18:20:34,007 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:20:34,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:20:34,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:34,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:34,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-06 18:20:34,384 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:20:34,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 18:20:34,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 18:20:34,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 18:20:34,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 18:20:34,386 INFO L87 Difference]: Start difference. First operand 37932 states and 48172 transitions. Second operand 5 states. [2018-11-06 18:20:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:20:37,520 INFO L93 Difference]: Finished difference Result 126163 states and 159704 transitions. [2018-11-06 18:20:37,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 18:20:37,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 225 [2018-11-06 18:20:37,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:20:37,655 INFO L225 Difference]: With dead ends: 126163 [2018-11-06 18:20:37,655 INFO L226 Difference]: Without dead ends: 88233 [2018-11-06 18:20:37,718 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 18:20:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88233 states. [2018-11-06 18:20:38,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88233 to 88220. [2018-11-06 18:20:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88220 states. [2018-11-06 18:20:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88220 states to 88220 states and 108664 transitions. [2018-11-06 18:20:38,845 INFO L78 Accepts]: Start accepts. Automaton has 88220 states and 108664 transitions. Word has length 225 [2018-11-06 18:20:38,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:20:38,845 INFO L480 AbstractCegarLoop]: Abstraction has 88220 states and 108664 transitions. [2018-11-06 18:20:38,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 18:20:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 88220 states and 108664 transitions. [2018-11-06 18:20:38,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-11-06 18:20:38,931 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:20:38,932 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 18:20:38,932 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:20:38,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:20:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2089000476, now seen corresponding path program 1 times [2018-11-06 18:20:38,933 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:20:38,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:20:38,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:38,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:38,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-06 18:20:39,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:20:39,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 18:20:39,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 18:20:39,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 18:20:39,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 18:20:39,561 INFO L87 Difference]: Start difference. First operand 88220 states and 108664 transitions. Second operand 3 states. [2018-11-06 18:20:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:20:41,203 INFO L93 Difference]: Finished difference Result 168731 states and 207345 transitions. [2018-11-06 18:20:41,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 18:20:41,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 264 [2018-11-06 18:20:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:20:41,298 INFO L225 Difference]: With dead ends: 168731 [2018-11-06 18:20:41,298 INFO L226 Difference]: Without dead ends: 80513 [2018-11-06 18:20:41,356 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 18:20:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80513 states. [2018-11-06 18:20:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80513 to 80513. [2018-11-06 18:20:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80513 states. [2018-11-06 18:20:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80513 states to 80513 states and 97363 transitions. [2018-11-06 18:20:42,278 INFO L78 Accepts]: Start accepts. Automaton has 80513 states and 97363 transitions. Word has length 264 [2018-11-06 18:20:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:20:42,279 INFO L480 AbstractCegarLoop]: Abstraction has 80513 states and 97363 transitions. [2018-11-06 18:20:42,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 18:20:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 80513 states and 97363 transitions. [2018-11-06 18:20:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-11-06 18:20:42,305 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:20:42,306 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 18:20:42,306 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:20:42,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:20:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1369324177, now seen corresponding path program 1 times [2018-11-06 18:20:42,307 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:20:42,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:20:42,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:42,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:42,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-11-06 18:20:42,619 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:20:42,620 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 18:20:42,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 18:20:42,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 18:20:42,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:20:42,621 INFO L87 Difference]: Start difference. First operand 80513 states and 97363 transitions. Second operand 4 states. [2018-11-06 18:20:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:20:44,607 INFO L93 Difference]: Finished difference Result 158145 states and 191328 transitions. [2018-11-06 18:20:44,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 18:20:44,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 279 [2018-11-06 18:20:44,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:20:44,690 INFO L225 Difference]: With dead ends: 158145 [2018-11-06 18:20:44,690 INFO L226 Difference]: Without dead ends: 77634 [2018-11-06 18:20:44,733 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:20:44,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77634 states. [2018-11-06 18:20:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77634 to 76410. [2018-11-06 18:20:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76410 states. [2018-11-06 18:20:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76410 states to 76410 states and 87917 transitions. [2018-11-06 18:20:45,792 INFO L78 Accepts]: Start accepts. Automaton has 76410 states and 87917 transitions. Word has length 279 [2018-11-06 18:20:45,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:20:45,792 INFO L480 AbstractCegarLoop]: Abstraction has 76410 states and 87917 transitions. [2018-11-06 18:20:45,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 18:20:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 76410 states and 87917 transitions. [2018-11-06 18:20:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-11-06 18:20:45,821 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:20:45,821 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 18:20:45,821 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:20:45,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:20:45,822 INFO L82 PathProgramCache]: Analyzing trace with hash 797567040, now seen corresponding path program 1 times [2018-11-06 18:20:45,822 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:20:45,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:20:45,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:45,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:45,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2018-11-06 18:20:46,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:20:46,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 18:20:46,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 18:20:46,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 18:20:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:20:46,201 INFO L87 Difference]: Start difference. First operand 76410 states and 87917 transitions. Second operand 4 states. [2018-11-06 18:20:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:20:49,399 INFO L93 Difference]: Finished difference Result 278773 states and 320534 transitions. [2018-11-06 18:20:49,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 18:20:49,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 292 [2018-11-06 18:20:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:20:49,652 INFO L225 Difference]: With dead ends: 278773 [2018-11-06 18:20:49,652 INFO L226 Difference]: Without dead ends: 202365 [2018-11-06 18:20:49,723 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:20:49,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202365 states. [2018-11-06 18:20:52,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202365 to 199070. [2018-11-06 18:20:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199070 states. [2018-11-06 18:20:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199070 states to 199070 states and 228706 transitions. [2018-11-06 18:20:52,371 INFO L78 Accepts]: Start accepts. Automaton has 199070 states and 228706 transitions. Word has length 292 [2018-11-06 18:20:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:20:52,371 INFO L480 AbstractCegarLoop]: Abstraction has 199070 states and 228706 transitions. [2018-11-06 18:20:52,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 18:20:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 199070 states and 228706 transitions. [2018-11-06 18:20:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2018-11-06 18:20:52,395 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:20:52,395 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 18:20:52,396 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:20:52,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:20:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1732862087, now seen corresponding path program 1 times [2018-11-06 18:20:52,396 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:20:52,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:20:52,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:52,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:20:52,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:20:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:20:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 18:20:52,817 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:20:52,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 18:20:52,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 18:20:52,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 18:20:52,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:20:52,819 INFO L87 Difference]: Start difference. First operand 199070 states and 228706 transitions. Second operand 4 states. [2018-11-06 18:20:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:20:56,750 INFO L93 Difference]: Finished difference Result 468936 states and 535642 transitions. [2018-11-06 18:20:56,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 18:20:56,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 305 [2018-11-06 18:20:56,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:20:57,035 INFO L225 Difference]: With dead ends: 468936 [2018-11-06 18:20:57,036 INFO L226 Difference]: Without dead ends: 269868 [2018-11-06 18:20:57,137 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:20:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269868 states. [2018-11-06 18:21:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269868 to 269437. [2018-11-06 18:21:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269437 states. [2018-11-06 18:21:00,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269437 states to 269437 states and 302663 transitions. [2018-11-06 18:21:00,788 INFO L78 Accepts]: Start accepts. Automaton has 269437 states and 302663 transitions. Word has length 305 [2018-11-06 18:21:00,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:21:00,788 INFO L480 AbstractCegarLoop]: Abstraction has 269437 states and 302663 transitions. [2018-11-06 18:21:00,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 18:21:00,788 INFO L276 IsEmpty]: Start isEmpty. Operand 269437 states and 302663 transitions. [2018-11-06 18:21:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2018-11-06 18:21:00,824 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:21:00,824 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 18:21:00,824 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:21:00,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:21:00,825 INFO L82 PathProgramCache]: Analyzing trace with hash 179923740, now seen corresponding path program 1 times [2018-11-06 18:21:00,825 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:21:00,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:21:00,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:21:00,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:21:00,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:21:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:21:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2018-11-06 18:21:01,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:21:01,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 18:21:01,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 18:21:01,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 18:21:01,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:21:01,245 INFO L87 Difference]: Start difference. First operand 269437 states and 302663 transitions. Second operand 4 states. [2018-11-06 18:21:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:21:04,145 INFO L93 Difference]: Finished difference Result 540775 states and 607217 transitions. [2018-11-06 18:21:04,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 18:21:04,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 348 [2018-11-06 18:21:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:21:04,462 INFO L225 Difference]: With dead ends: 540775 [2018-11-06 18:21:04,462 INFO L226 Difference]: Without dead ends: 271340 [2018-11-06 18:21:04,597 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:21:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271340 states. [2018-11-06 18:21:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271340 to 268580. [2018-11-06 18:21:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268580 states. [2018-11-06 18:21:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268580 states to 268580 states and 299186 transitions. [2018-11-06 18:21:14,405 INFO L78 Accepts]: Start accepts. Automaton has 268580 states and 299186 transitions. Word has length 348 [2018-11-06 18:21:14,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:21:14,405 INFO L480 AbstractCegarLoop]: Abstraction has 268580 states and 299186 transitions. [2018-11-06 18:21:14,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 18:21:14,406 INFO L276 IsEmpty]: Start isEmpty. Operand 268580 states and 299186 transitions. [2018-11-06 18:21:14,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-11-06 18:21:14,429 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:21:14,429 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 18:21:14,429 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:21:14,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:21:14,430 INFO L82 PathProgramCache]: Analyzing trace with hash 2075183857, now seen corresponding path program 1 times [2018-11-06 18:21:14,430 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:21:14,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:21:14,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:21:14,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:21:14,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:21:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:21:14,976 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-11-06 18:21:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-11-06 18:21:15,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:21:15,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 18:21:15,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 18:21:15,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 18:21:15,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 18:21:15,060 INFO L87 Difference]: Start difference. First operand 268580 states and 299186 transitions. Second operand 5 states. [2018-11-06 18:21:21,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:21:21,212 INFO L93 Difference]: Finished difference Result 679334 states and 758132 transitions. [2018-11-06 18:21:21,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 18:21:21,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 368 [2018-11-06 18:21:21,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:21:21,726 INFO L225 Difference]: With dead ends: 679334 [2018-11-06 18:21:21,726 INFO L226 Difference]: Without dead ends: 410756 [2018-11-06 18:21:21,822 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-06 18:21:22,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410756 states. [2018-11-06 18:21:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410756 to 406579. [2018-11-06 18:21:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406579 states. [2018-11-06 18:21:26,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406579 states to 406579 states and 452962 transitions. [2018-11-06 18:21:26,758 INFO L78 Accepts]: Start accepts. Automaton has 406579 states and 452962 transitions. Word has length 368 [2018-11-06 18:21:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:21:26,758 INFO L480 AbstractCegarLoop]: Abstraction has 406579 states and 452962 transitions. [2018-11-06 18:21:26,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 18:21:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 406579 states and 452962 transitions. [2018-11-06 18:21:26,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-11-06 18:21:26,784 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:21:26,785 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 18:21:26,785 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:21:26,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:21:26,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1022522118, now seen corresponding path program 1 times [2018-11-06 18:21:26,785 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:21:26,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:21:26,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:21:26,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:21:26,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:21:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:21:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-06 18:21:27,222 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:21:27,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-06 18:21:27,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 18:21:27,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 18:21:27,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:21:27,223 INFO L87 Difference]: Start difference. First operand 406579 states and 452962 transitions. Second operand 4 states. [2018-11-06 18:21:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:21:33,657 INFO L93 Difference]: Finished difference Result 824115 states and 918045 transitions. [2018-11-06 18:21:33,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 18:21:33,658 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 368 [2018-11-06 18:21:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:21:34,106 INFO L225 Difference]: With dead ends: 824115 [2018-11-06 18:21:34,106 INFO L226 Difference]: Without dead ends: 417538 [2018-11-06 18:21:34,203 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:21:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417538 states. [2018-11-06 18:21:45,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417538 to 396314. [2018-11-06 18:21:45,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396314 states. [2018-11-06 18:21:45,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396314 states to 396314 states and 440012 transitions. [2018-11-06 18:21:45,802 INFO L78 Accepts]: Start accepts. Automaton has 396314 states and 440012 transitions. Word has length 368 [2018-11-06 18:21:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:21:45,803 INFO L480 AbstractCegarLoop]: Abstraction has 396314 states and 440012 transitions. [2018-11-06 18:21:45,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 18:21:45,803 INFO L276 IsEmpty]: Start isEmpty. Operand 396314 states and 440012 transitions. [2018-11-06 18:21:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-11-06 18:21:45,828 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:21:45,828 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 18:21:45,828 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:21:45,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:21:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1775015508, now seen corresponding path program 1 times [2018-11-06 18:21:45,829 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:21:45,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:21:45,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:21:45,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:21:45,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:21:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:21:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-11-06 18:21:46,140 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 18:21:46,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 18:21:46,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 18:21:46,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 18:21:46,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:21:46,141 INFO L87 Difference]: Start difference. First operand 396314 states and 440012 transitions. Second operand 4 states. [2018-11-06 18:21:51,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:21:51,102 INFO L93 Difference]: Finished difference Result 811128 states and 901067 transitions. [2018-11-06 18:21:51,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 18:21:51,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 375 [2018-11-06 18:21:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:21:51,536 INFO L225 Difference]: With dead ends: 811128 [2018-11-06 18:21:51,536 INFO L226 Difference]: Without dead ends: 392272 [2018-11-06 18:21:53,142 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:21:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392272 states. [2018-11-06 18:21:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392272 to 321262. [2018-11-06 18:21:56,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321262 states. [2018-11-06 18:21:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321262 states to 321262 states and 350128 transitions. [2018-11-06 18:21:58,109 INFO L78 Accepts]: Start accepts. Automaton has 321262 states and 350128 transitions. Word has length 375 [2018-11-06 18:21:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:21:58,109 INFO L480 AbstractCegarLoop]: Abstraction has 321262 states and 350128 transitions. [2018-11-06 18:21:58,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 18:21:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 321262 states and 350128 transitions. [2018-11-06 18:21:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-11-06 18:21:58,133 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:21:58,134 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2018-11-06 18:21:58,134 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:21:58,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:21:58,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1461030302, now seen corresponding path program 1 times [2018-11-06 18:21:58,134 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:21:58,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:21:58,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:21:58,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:21:58,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:21:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:21:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 347 proven. 32 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-11-06 18:21:58,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 18:21:58,568 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 18:21:58,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:21:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:21:58,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 18:21:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-11-06 18:21:58,910 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 18:21:58,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2018-11-06 18:21:58,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 18:21:58,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 18:21:58,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:21:58,914 INFO L87 Difference]: Start difference. First operand 321262 states and 350128 transitions. Second operand 4 states. [2018-11-06 18:22:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:22:06,306 INFO L93 Difference]: Finished difference Result 1119387 states and 1215646 transitions. [2018-11-06 18:22:06,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 18:22:06,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 420 [2018-11-06 18:22:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:22:08,640 INFO L225 Difference]: With dead ends: 1119387 [2018-11-06 18:22:08,641 INFO L226 Difference]: Without dead ends: 798127 [2018-11-06 18:22:08,819 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-06 18:22:09,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798127 states. [2018-11-06 18:22:23,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798127 to 534707. [2018-11-06 18:22:23,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 534707 states. [2018-11-06 18:22:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534707 states to 534707 states and 579768 transitions. [2018-11-06 18:22:24,449 INFO L78 Accepts]: Start accepts. Automaton has 534707 states and 579768 transitions. Word has length 420 [2018-11-06 18:22:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 18:22:24,450 INFO L480 AbstractCegarLoop]: Abstraction has 534707 states and 579768 transitions. [2018-11-06 18:22:24,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 18:22:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 534707 states and 579768 transitions. [2018-11-06 18:22:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-11-06 18:22:24,492 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 18:22:24,492 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1] [2018-11-06 18:22:24,492 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 18:22:24,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 18:22:24,493 INFO L82 PathProgramCache]: Analyzing trace with hash 235689142, now seen corresponding path program 1 times [2018-11-06 18:22:24,493 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 18:22:24,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 18:22:24,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:22:24,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:22:24,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 18:22:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:22:26,335 WARN L179 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-06 18:22:26,556 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-11-06 18:22:26,812 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-11-06 18:22:27,040 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-11-06 18:22:27,702 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 352 proven. 77 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-11-06 18:22:27,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 18:22:27,702 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 18:22:27,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 18:22:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 18:22:27,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 18:22:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-11-06 18:22:28,128 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 18:22:28,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2018-11-06 18:22:28,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 18:22:28,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 18:22:28,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-11-06 18:22:28,130 INFO L87 Difference]: Start difference. First operand 534707 states and 579768 transitions. Second operand 11 states. [2018-11-06 18:22:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 18:22:51,675 INFO L93 Difference]: Finished difference Result 2241898 states and 2422963 transitions. [2018-11-06 18:22:51,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 18:22:51,675 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 427 [2018-11-06 18:22:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 18:22:54,104 INFO L225 Difference]: With dead ends: 2241898 [2018-11-06 18:22:54,104 INFO L226 Difference]: Without dead ends: 1707193 [2018-11-06 18:22:54,442 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2018-11-06 18:22:55,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707193 states. Received shutdown request... [2018-11-06 18:23:18,701 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 18:23:18,705 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 18:23:18,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 06:23:18 BoogieIcfgContainer [2018-11-06 18:23:18,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 18:23:18,707 INFO L168 Benchmark]: Toolchain (without parser) took 196046.91 ms. Allocated memory was 1.5 GB in the beginning and 7.3 GB in the end (delta: 5.8 GB). Free memory was 1.4 GB in the beginning and 4.8 GB in the end (delta: -3.4 GB). Peak memory consumption was 5.1 GB. Max. memory is 7.1 GB. [2018-11-06 18:23:18,708 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 18:23:18,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1389.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-11-06 18:23:18,710 INFO L168 Benchmark]: Boogie Procedure Inliner took 296.30 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -861.4 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2018-11-06 18:23:18,713 INFO L168 Benchmark]: Boogie Preprocessor took 150.43 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 18:23:18,713 INFO L168 Benchmark]: RCFGBuilder took 5591.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 256.5 MB). Peak memory consumption was 256.5 MB. Max. memory is 7.1 GB. [2018-11-06 18:23:18,714 INFO L168 Benchmark]: TraceAbstraction took 188613.96 ms. Allocated memory was 2.3 GB in the beginning and 7.3 GB in the end (delta: 5.0 GB). Free memory was 1.9 GB in the beginning and 4.8 GB in the end (delta: -2.9 GB). Peak memory consumption was 4.9 GB. Max. memory is 7.1 GB. [2018-11-06 18:23:18,719 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1389.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 296.30 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 748.2 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -861.4 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.43 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5591.23 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 256.5 MB). Peak memory consumption was 256.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 188613.96 ms. Allocated memory was 2.3 GB in the beginning and 7.3 GB in the end (delta: 5.0 GB). Free memory was 1.9 GB in the beginning and 4.8 GB in the end (delta: -2.9 GB). Peak memory consumption was 4.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1491]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1491). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 303 locations, 1 error locations. TIMEOUT Result, 188.5s OverallTime, 17 OverallIterations, 6 TraceHistogramMax, 94.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4019 SDtfs, 14658 SDslu, 4698 SDs, 0 SdLazy, 25856 SolverSat, 4903 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1127 GetRequests, 1067 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=534707occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 81.9s AutomataMinimizationTime, 17 MinimizatonAttempts, 383903 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 5786 NumberOfCodeBlocks, 5786 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 5766 ConstructedInterpolants, 0 QuantifiedInterpolants, 5832016 SizeOfPredicates, 1 NumberOfNonLiveVariables, 1826 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 20 InterpolantComputations, 17 PerfectInterpolantSequences, 4504/4617 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown