java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-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/Problem13_label39_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:19:52,060 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:19:52,062 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:19:52,074 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:19:52,074 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:19:52,075 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:19:52,076 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:19:52,078 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:19:52,080 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:19:52,081 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:19:52,081 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:19:52,082 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:19:52,083 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:19:52,083 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:19:52,084 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:19:52,085 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:19:52,086 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:19:52,088 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:19:52,090 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:19:52,091 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:19:52,092 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:19:52,094 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:19:52,096 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 20:19:52,102 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 20:19:52,102 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 20:19:52,103 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 20:19:52,104 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 20:19:52,104 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 20:19:52,124 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:19:52,124 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:19:52,125 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:19:52,125 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:19:52,126 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:19:52,126 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:19:52,126 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:19:52,126 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:19:52,126 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:19:52,127 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:19:52,127 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:19:52,127 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:19:52,127 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:19:52,127 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:19:52,128 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:19:52,128 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:19:52,128 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:19:52,128 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:19:52,129 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:19:52,129 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:19:52,129 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:19:52,129 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:19:52,129 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:19:52,130 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:19:52,130 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:19:52,130 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:19:52,130 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:19:52,130 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:19:52,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:19:52,188 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:19:52,193 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:19:52,194 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:19:52,195 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:19:52,195 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label39_true-unreach-call.c [2018-10-23 20:19:52,263 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/59a892ca0/322cab3664be4cb290956628f1c55ff8/FLAG4fe616892 [2018-10-23 20:19:53,027 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:19:53,028 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label39_true-unreach-call.c [2018-10-23 20:19:53,066 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/59a892ca0/322cab3664be4cb290956628f1c55ff8/FLAG4fe616892 [2018-10-23 20:19:53,089 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/59a892ca0/322cab3664be4cb290956628f1c55ff8 [2018-10-23 20:19:53,100 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:19:53,104 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:19:53,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:19:53,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:19:53,111 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:19:53,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:19:53" (1/1) ... [2018-10-23 20:19:53,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21962dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:53, skipping insertion in model container [2018-10-23 20:19:53,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:19:53" (1/1) ... [2018-10-23 20:19:53,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:19:53,350 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:19:54,827 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:19:54,833 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:19:55,575 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:19:55,615 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:19:55,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55 WrapperNode [2018-10-23 20:19:55,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:19:55,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:19:55,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:19:55,617 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:19:55,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55" (1/1) ... [2018-10-23 20:19:55,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55" (1/1) ... [2018-10-23 20:19:56,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:19:56,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:19:56,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:19:56,474 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:19:56,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55" (1/1) ... [2018-10-23 20:19:56,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55" (1/1) ... [2018-10-23 20:19:56,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55" (1/1) ... [2018-10-23 20:19:56,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55" (1/1) ... [2018-10-23 20:19:56,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55" (1/1) ... [2018-10-23 20:19:56,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55" (1/1) ... [2018-10-23 20:19:56,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55" (1/1) ... [2018-10-23 20:19:56,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:19:56,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:19:56,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:19:56,987 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:19:56,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 20:19:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:19:57,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:19:57,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:20:10,387 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:20:10,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:20:10 BoogieIcfgContainer [2018-10-23 20:20:10,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:20:10,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:20:10,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:20:10,392 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:20:10,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:19:53" (1/3) ... [2018-10-23 20:20:10,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566c801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:20:10, skipping insertion in model container [2018-10-23 20:20:10,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:19:55" (2/3) ... [2018-10-23 20:20:10,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@566c801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:20:10, skipping insertion in model container [2018-10-23 20:20:10,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:20:10" (3/3) ... [2018-10-23 20:20:10,396 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label39_true-unreach-call.c [2018-10-23 20:20:10,407 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:20:10,420 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:20:10,439 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:20:10,493 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:20:10,494 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:20:10,495 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:20:10,495 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:20:10,495 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:20:10,495 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:20:10,495 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:20:10,495 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:20:10,495 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:20:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-23 20:20:10,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-23 20:20:10,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:20:10,552 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] [2018-10-23 20:20:10,554 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:20:10,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:20:10,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2139005982, now seen corresponding path program 1 times [2018-10-23 20:20:10,563 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:20:10,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:20:10,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:10,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:20:10,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:20:11,208 WARN L179 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-23 20:20:11,614 WARN L179 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2018-10-23 20:20:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:20:11,928 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:20:11,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:20:11,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:20:11,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:20:11,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:20:11,954 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 5 states. [2018-10-23 20:20:12,252 WARN L179 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-23 20:20:30,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:20:30,835 INFO L93 Difference]: Finished difference Result 4624 states and 8784 transitions. [2018-10-23 20:20:30,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:20:30,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2018-10-23 20:20:30,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:20:30,893 INFO L225 Difference]: With dead ends: 4624 [2018-10-23 20:20:30,893 INFO L226 Difference]: Without dead ends: 3515 [2018-10-23 20:20:30,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:20:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2018-10-23 20:20:31,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 3514. [2018-10-23 20:20:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3514 states. [2018-10-23 20:20:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5233 transitions. [2018-10-23 20:20:31,106 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5233 transitions. Word has length 52 [2018-10-23 20:20:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:20:31,106 INFO L481 AbstractCegarLoop]: Abstraction has 3514 states and 5233 transitions. [2018-10-23 20:20:31,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:20:31,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5233 transitions. [2018-10-23 20:20:31,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-23 20:20:31,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:20:31,120 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, 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] [2018-10-23 20:20:31,121 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:20:31,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:20:31,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1783474675, now seen corresponding path program 1 times [2018-10-23 20:20:31,121 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:20:31,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:20:31,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:31,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:20:31,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:20:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:20:31,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:20:31,556 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 20:20:31,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:20:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:20:31,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:20:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:20:31,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:20:31,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2018-10-23 20:20:31,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:20:31,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:20:31,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:20:31,902 INFO L87 Difference]: Start difference. First operand 3514 states and 5233 transitions. Second operand 5 states. [2018-10-23 20:20:52,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:20:52,081 INFO L93 Difference]: Finished difference Result 11950 states and 19425 transitions. [2018-10-23 20:20:52,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:20:52,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2018-10-23 20:20:52,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:20:52,141 INFO L225 Difference]: With dead ends: 11950 [2018-10-23 20:20:52,141 INFO L226 Difference]: Without dead ends: 9226 [2018-10-23 20:20:52,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:20:52,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9226 states. [2018-10-23 20:20:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9226 to 7520. [2018-10-23 20:20:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7520 states. [2018-10-23 20:20:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7520 states to 7520 states and 10752 transitions. [2018-10-23 20:20:52,328 INFO L78 Accepts]: Start accepts. Automaton has 7520 states and 10752 transitions. Word has length 178 [2018-10-23 20:20:52,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:20:52,329 INFO L481 AbstractCegarLoop]: Abstraction has 7520 states and 10752 transitions. [2018-10-23 20:20:52,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:20:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 7520 states and 10752 transitions. [2018-10-23 20:20:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-10-23 20:20:52,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:20:52,347 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, 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] [2018-10-23 20:20:52,349 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:20:52,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:20:52,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1440360477, now seen corresponding path program 1 times [2018-10-23 20:20:52,350 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:20:52,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:20:52,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:52,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:20:52,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:20:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 99 proven. 4 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-23 20:20:52,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:20:52,777 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 20:20:52,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:20:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:20:52,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:20:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:20:52,971 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:20:52,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-23 20:20:52,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:20:52,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:20:52,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:20:52,973 INFO L87 Difference]: Start difference. First operand 7520 states and 10752 transitions. Second operand 4 states. [2018-10-23 20:21:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:21:05,260 INFO L93 Difference]: Finished difference Result 23795 states and 35461 transitions. [2018-10-23 20:21:05,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:21:05,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 221 [2018-10-23 20:21:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:21:05,334 INFO L225 Difference]: With dead ends: 23795 [2018-10-23 20:21:05,335 INFO L226 Difference]: Without dead ends: 17065 [2018-10-23 20:21:05,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:21:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17065 states. [2018-10-23 20:21:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17065 to 10681. [2018-10-23 20:21:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10681 states. [2018-10-23 20:21:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10681 states to 10681 states and 14411 transitions. [2018-10-23 20:21:05,605 INFO L78 Accepts]: Start accepts. Automaton has 10681 states and 14411 transitions. Word has length 221 [2018-10-23 20:21:05,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:21:05,606 INFO L481 AbstractCegarLoop]: Abstraction has 10681 states and 14411 transitions. [2018-10-23 20:21:05,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:21:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand 10681 states and 14411 transitions. [2018-10-23 20:21:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-23 20:21:05,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:21:05,619 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, 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] [2018-10-23 20:21:05,619 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:21:05,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:21:05,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1623588500, now seen corresponding path program 1 times [2018-10-23 20:21:05,620 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:21:05,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:21:05,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:05,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:21:05,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:21:06,015 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-23 20:21:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 99 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-10-23 20:21:06,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:21:06,338 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 20:21:06,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:21:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:21:06,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:21:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-10-23 20:21:06,632 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:21:06,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2018-10-23 20:21:06,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:21:06,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:21:06,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:21:06,634 INFO L87 Difference]: Start difference. First operand 10681 states and 14411 transitions. Second operand 5 states. [2018-10-23 20:21:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:21:16,819 INFO L93 Difference]: Finished difference Result 33179 states and 46407 transitions. [2018-10-23 20:21:16,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:21:16,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2018-10-23 20:21:16,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:21:16,880 INFO L225 Difference]: With dead ends: 33179 [2018-10-23 20:21:16,881 INFO L226 Difference]: Without dead ends: 23288 [2018-10-23 20:21:16,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:21:16,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23288 states. [2018-10-23 20:21:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23288 to 22497. [2018-10-23 20:21:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22497 states. [2018-10-23 20:21:17,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22497 states to 22497 states and 28344 transitions. [2018-10-23 20:21:17,249 INFO L78 Accepts]: Start accepts. Automaton has 22497 states and 28344 transitions. Word has length 247 [2018-10-23 20:21:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:21:17,250 INFO L481 AbstractCegarLoop]: Abstraction has 22497 states and 28344 transitions. [2018-10-23 20:21:17,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:21:17,250 INFO L276 IsEmpty]: Start isEmpty. Operand 22497 states and 28344 transitions. [2018-10-23 20:21:17,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-23 20:21:17,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:21:17,257 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:21:17,257 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:21:17,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:21:17,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2062980818, now seen corresponding path program 1 times [2018-10-23 20:21:17,258 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:21:17,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:21:17,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:17,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:21:17,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:21:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:21:18,000 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:21:18,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:21:18,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:21:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:21:18,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:21:18,002 INFO L87 Difference]: Start difference. First operand 22497 states and 28344 transitions. Second operand 5 states. [2018-10-23 20:21:41,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:21:41,388 INFO L93 Difference]: Finished difference Result 98108 states and 125214 transitions. [2018-10-23 20:21:41,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:21:41,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2018-10-23 20:21:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:21:41,520 INFO L225 Difference]: With dead ends: 98108 [2018-10-23 20:21:41,521 INFO L226 Difference]: Without dead ends: 76401 [2018-10-23 20:21:41,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:21:41,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76401 states. [2018-10-23 20:21:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76401 to 74624. [2018-10-23 20:21:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74624 states. [2018-10-23 20:21:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74624 states to 74624 states and 90124 transitions. [2018-10-23 20:21:42,521 INFO L78 Accepts]: Start accepts. Automaton has 74624 states and 90124 transitions. Word has length 251 [2018-10-23 20:21:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:21:42,521 INFO L481 AbstractCegarLoop]: Abstraction has 74624 states and 90124 transitions. [2018-10-23 20:21:42,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:21:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 74624 states and 90124 transitions. [2018-10-23 20:21:42,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-10-23 20:21:42,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:21:42,534 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:21:42,534 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:21:42,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:21:42,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1177818110, now seen corresponding path program 1 times [2018-10-23 20:21:42,535 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:21:42,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:21:42,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:42,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:21:42,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:21:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2018-10-23 20:21:43,061 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:21:43,061 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:21:43,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:21:43,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:21:43,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:21:43,062 INFO L87 Difference]: Start difference. First operand 74624 states and 90124 transitions. Second operand 4 states. [2018-10-23 20:21:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:21:56,532 INFO L93 Difference]: Finished difference Result 238332 states and 288632 transitions. [2018-10-23 20:21:56,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:21:56,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2018-10-23 20:21:56,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:21:56,752 INFO L225 Difference]: With dead ends: 238332 [2018-10-23 20:21:56,752 INFO L226 Difference]: Without dead ends: 159753 [2018-10-23 20:21:56,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:21:56,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159753 states. [2018-10-23 20:21:59,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159753 to 159710. [2018-10-23 20:21:59,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159710 states. [2018-10-23 20:21:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159710 states to 159710 states and 184119 transitions. [2018-10-23 20:21:59,232 INFO L78 Accepts]: Start accepts. Automaton has 159710 states and 184119 transitions. Word has length 341 [2018-10-23 20:21:59,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:21:59,233 INFO L481 AbstractCegarLoop]: Abstraction has 159710 states and 184119 transitions. [2018-10-23 20:21:59,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:21:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 159710 states and 184119 transitions. [2018-10-23 20:21:59,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2018-10-23 20:21:59,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:21:59,248 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:21:59,248 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:21:59,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:21:59,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1547239283, now seen corresponding path program 1 times [2018-10-23 20:21:59,249 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:21:59,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:21:59,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:59,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:21:59,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:21:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2018-10-23 20:21:59,732 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:21:59,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:21:59,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:21:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:21:59,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:21:59,734 INFO L87 Difference]: Start difference. First operand 159710 states and 184119 transitions. Second operand 4 states. [2018-10-23 20:22:10,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:22:10,805 INFO L93 Difference]: Finished difference Result 318667 states and 367620 transitions. [2018-10-23 20:22:10,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:22:10,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 353 [2018-10-23 20:22:10,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:22:10,992 INFO L225 Difference]: With dead ends: 318667 [2018-10-23 20:22:10,992 INFO L226 Difference]: Without dead ends: 154996 [2018-10-23 20:22:11,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:22:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154996 states. [2018-10-23 20:22:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154996 to 146280. [2018-10-23 20:22:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146280 states. [2018-10-23 20:22:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146280 states to 146280 states and 161094 transitions. [2018-10-23 20:22:13,425 INFO L78 Accepts]: Start accepts. Automaton has 146280 states and 161094 transitions. Word has length 353 [2018-10-23 20:22:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:22:13,426 INFO L481 AbstractCegarLoop]: Abstraction has 146280 states and 161094 transitions. [2018-10-23 20:22:13,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:22:13,426 INFO L276 IsEmpty]: Start isEmpty. Operand 146280 states and 161094 transitions. [2018-10-23 20:22:13,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2018-10-23 20:22:13,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:22:13,433 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:22:13,434 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:22:13,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:22:13,434 INFO L82 PathProgramCache]: Analyzing trace with hash -762174136, now seen corresponding path program 1 times [2018-10-23 20:22:13,434 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:22:13,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:22:13,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:22:13,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:22:13,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:22:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:22:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-23 20:22:13,806 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:22:13,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:22:13,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:22:13,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:22:13,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:22:13,808 INFO L87 Difference]: Start difference. First operand 146280 states and 161094 transitions. Second operand 3 states. [2018-10-23 20:22:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:22:21,371 INFO L93 Difference]: Finished difference Result 290188 states and 320008 transitions. [2018-10-23 20:22:21,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:22:21,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 371 [2018-10-23 20:22:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:22:21,542 INFO L225 Difference]: With dead ends: 290188 [2018-10-23 20:22:21,542 INFO L226 Difference]: Without dead ends: 144698 [2018-10-23 20:22:21,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:22:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144698 states. [2018-10-23 20:22:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144698 to 140756. [2018-10-23 20:22:22,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140756 states. [2018-10-23 20:22:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140756 states to 140756 states and 150932 transitions. [2018-10-23 20:22:22,929 INFO L78 Accepts]: Start accepts. Automaton has 140756 states and 150932 transitions. Word has length 371 [2018-10-23 20:22:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:22:22,930 INFO L481 AbstractCegarLoop]: Abstraction has 140756 states and 150932 transitions. [2018-10-23 20:22:22,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:22:22,931 INFO L276 IsEmpty]: Start isEmpty. Operand 140756 states and 150932 transitions. [2018-10-23 20:22:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2018-10-23 20:22:22,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:22:22,943 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 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] [2018-10-23 20:22:22,944 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:22:22,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:22:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1006150929, now seen corresponding path program 1 times [2018-10-23 20:22:22,944 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:22:22,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:22:22,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:22:22,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:22:22,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:22:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:22:23,370 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 20:22:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 521 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2018-10-23 20:22:23,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:22:23,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:22:23,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:22:23,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:22:23,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:22:23,602 INFO L87 Difference]: Start difference. First operand 140756 states and 150932 transitions. Second operand 4 states. [2018-10-23 20:22:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:22:32,670 INFO L93 Difference]: Finished difference Result 291753 states and 312999 transitions. [2018-10-23 20:22:32,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:22:32,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 450 [2018-10-23 20:22:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:22:32,842 INFO L225 Difference]: With dead ends: 291753 [2018-10-23 20:22:32,843 INFO L226 Difference]: Without dead ends: 130437 [2018-10-23 20:22:32,926 INFO L605 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 [2018-10-23 20:22:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130437 states. [2018-10-23 20:22:35,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130437 to 120973. [2018-10-23 20:22:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120973 states. [2018-10-23 20:22:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120973 states to 120973 states and 128627 transitions. [2018-10-23 20:22:35,450 INFO L78 Accepts]: Start accepts. Automaton has 120973 states and 128627 transitions. Word has length 450 [2018-10-23 20:22:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:22:35,450 INFO L481 AbstractCegarLoop]: Abstraction has 120973 states and 128627 transitions. [2018-10-23 20:22:35,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:22:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 120973 states and 128627 transitions. [2018-10-23 20:22:35,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-10-23 20:22:35,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:22:35,460 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:22:35,460 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:22:35,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:22:35,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1572031218, now seen corresponding path program 1 times [2018-10-23 20:22:35,461 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:22:35,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:22:35,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:22:35,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:22:35,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:22:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:22:35,899 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 515 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-23 20:22:35,900 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:22:35,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:22:35,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:22:35,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:22:35,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:22:35,901 INFO L87 Difference]: Start difference. First operand 120973 states and 128627 transitions. Second operand 4 states. [2018-10-23 20:22:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:22:50,322 INFO L93 Difference]: Finished difference Result 305002 states and 326845 transitions. [2018-10-23 20:22:50,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:22:50,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2018-10-23 20:22:50,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:22:52,310 INFO L225 Difference]: With dead ends: 305002 [2018-10-23 20:22:52,310 INFO L226 Difference]: Without dead ends: 181657 [2018-10-23 20:22:52,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:22:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181657 states. [2018-10-23 20:22:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181657 to 172178. [2018-10-23 20:22:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172178 states. [2018-10-23 20:22:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172178 states to 172178 states and 182371 transitions. [2018-10-23 20:22:59,697 INFO L78 Accepts]: Start accepts. Automaton has 172178 states and 182371 transitions. Word has length 504 [2018-10-23 20:22:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:22:59,697 INFO L481 AbstractCegarLoop]: Abstraction has 172178 states and 182371 transitions. [2018-10-23 20:22:59,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:22:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 172178 states and 182371 transitions. [2018-10-23 20:22:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2018-10-23 20:22:59,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:22:59,705 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:22:59,705 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:22:59,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:22:59,705 INFO L82 PathProgramCache]: Analyzing trace with hash -750534439, now seen corresponding path program 1 times [2018-10-23 20:22:59,706 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:22:59,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:22:59,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:22:59,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:22:59,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:22:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:23:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 692 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2018-10-23 20:23:00,218 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:23:00,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:23:00,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:23:00,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:23:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:23:00,219 INFO L87 Difference]: Start difference. First operand 172178 states and 182371 transitions. Second operand 4 states. [2018-10-23 20:23:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:23:12,854 INFO L93 Difference]: Finished difference Result 383889 states and 407268 transitions. [2018-10-23 20:23:12,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:23:12,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 513 [2018-10-23 20:23:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:23:13,129 INFO L225 Difference]: With dead ends: 383889 [2018-10-23 20:23:13,130 INFO L226 Difference]: Without dead ends: 212501 [2018-10-23 20:23:13,217 INFO L605 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 [2018-10-23 20:23:13,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212501 states. [2018-10-23 20:23:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212501 to 202922. [2018-10-23 20:23:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202922 states. [2018-10-23 20:23:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202922 states to 202922 states and 215374 transitions. [2018-10-23 20:23:15,725 INFO L78 Accepts]: Start accepts. Automaton has 202922 states and 215374 transitions. Word has length 513 [2018-10-23 20:23:15,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:23:15,726 INFO L481 AbstractCegarLoop]: Abstraction has 202922 states and 215374 transitions. [2018-10-23 20:23:15,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:23:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand 202922 states and 215374 transitions. [2018-10-23 20:23:15,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2018-10-23 20:23:15,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:23:15,734 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:23:15,734 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:23:15,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:23:15,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1359207258, now seen corresponding path program 1 times [2018-10-23 20:23:15,735 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:23:15,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:23:15,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:23:15,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:23:15,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:23:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:23:17,269 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-10-23 20:23:17,270 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:23:17,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:23:17,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:23:17,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:23:17,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:23:17,271 INFO L87 Difference]: Start difference. First operand 202922 states and 215374 transitions. Second operand 5 states. [2018-10-23 20:23:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:23:32,785 INFO L93 Difference]: Finished difference Result 465781 states and 494257 transitions. [2018-10-23 20:23:32,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:23:32,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 535 [2018-10-23 20:23:32,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:23:33,134 INFO L225 Difference]: With dead ends: 465781 [2018-10-23 20:23:33,134 INFO L226 Difference]: Without dead ends: 263649 [2018-10-23 20:23:33,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:23:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263649 states. [2018-10-23 20:23:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263649 to 249436. [2018-10-23 20:23:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249436 states. [2018-10-23 20:23:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249436 states to 249436 states and 262697 transitions. [2018-10-23 20:23:36,870 INFO L78 Accepts]: Start accepts. Automaton has 249436 states and 262697 transitions. Word has length 535 [2018-10-23 20:23:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:23:36,871 INFO L481 AbstractCegarLoop]: Abstraction has 249436 states and 262697 transitions. [2018-10-23 20:23:36,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:23:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 249436 states and 262697 transitions. [2018-10-23 20:23:36,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2018-10-23 20:23:36,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:23:36,901 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:23:36,901 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:23:36,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:23:36,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2059296093, now seen corresponding path program 1 times [2018-10-23 20:23:36,901 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:23:36,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:23:36,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:23:36,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:23:36,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:23:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:23:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 149 proven. 353 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-23 20:23:39,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:23:39,000 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:23:39,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:23:39,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:23:39,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:23:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 50 proven. 452 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-23 20:23:40,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:23:40,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-23 20:23:40,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:23:40,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:23:40,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:23:40,219 INFO L87 Difference]: Start difference. First operand 249436 states and 262697 transitions. Second operand 6 states. Received shutdown request... [2018-10-23 20:23:40,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:23:40,314 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:23:40,320 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:23:40,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:23:40 BoogieIcfgContainer [2018-10-23 20:23:40,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:23:40,321 INFO L168 Benchmark]: Toolchain (without parser) took 227219.94 ms. Allocated memory was 1.5 GB in the beginning and 4.3 GB in the end (delta: 2.8 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -690.5 MB). Peak memory consumption was 2.1 GB. Max. memory is 7.1 GB. [2018-10-23 20:23:40,322 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. [2018-10-23 20:23:40,323 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2511.14 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 256.3 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. [2018-10-23 20:23:40,323 INFO L168 Benchmark]: Boogie Procedure Inliner took 856.33 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 823.1 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. [2018-10-23 20:23:40,324 INFO L168 Benchmark]: Boogie Preprocessor took 513.06 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 80.4 MB). Peak memory consumption was 80.4 MB. Max. memory is 7.1 GB. [2018-10-23 20:23:40,325 INFO L168 Benchmark]: RCFGBuilder took 13401.39 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 236.5 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 35.2 MB). Peak memory consumption was 584.5 MB. Max. memory is 7.1 GB. [2018-10-23 20:23:40,326 INFO L168 Benchmark]: TraceAbstraction took 209931.31 ms. Allocated memory was 2.6 GB in the beginning and 4.3 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -39.6 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-23 20:23:40,331 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 2511.14 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 256.3 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 856.33 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 823.1 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 73.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 513.06 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 80.4 MB). Peak memory consumption was 80.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13401.39 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 236.5 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 35.2 MB). Peak memory consumption was 584.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 209931.31 ms. Allocated memory was 2.6 GB in the beginning and 4.3 GB in the end (delta: 1.8 GB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: -39.6 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 165]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 165). Cancelled while BasicCegarLoop was constructing difference of abstraction (249436states) and FLOYD_HOARE automaton (currently 3 states, 6 states before enhancement),while ReachableStatesComputation was computing reachable states (41 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 209.8s OverallTime, 13 OverallIterations, 6 TraceHistogramMax, 173.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8761 SDtfs, 27184 SDslu, 3627 SDs, 0 SdLazy, 65987 SolverSat, 15967 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 137.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1416 GetRequests, 1372 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=249436occurred in iteration=12, 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: 23.9s AutomataMinimizationTime, 12 MinimizatonAttempts, 66095 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 6092 NumberOfCodeBlocks, 6092 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 6075 ConstructedInterpolants, 0 QuantifiedInterpolants, 6923049 SizeOfPredicates, 2 NumberOfNonLiveVariables, 1762 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 17 InterpolantComputations, 11 PerfectInterpolantSequences, 5188/6096 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown