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/Problem16_label31_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 18:21:45,757 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 18:21:45,760 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 18:21:45,775 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 18:21:45,776 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 18:21:45,777 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 18:21:45,778 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 18:21:45,780 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 18:21:45,782 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 18:21:45,782 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 18:21:45,783 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 18:21:45,784 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 18:21:45,785 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 18:21:45,786 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 18:21:45,787 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 18:21:45,788 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 18:21:45,788 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 18:21:45,790 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 18:21:45,792 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 18:21:45,794 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 18:21:45,795 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 18:21:45,796 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 18:21:45,798 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 18:21:45,807 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 18:21:45,826 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 18:21:45,826 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 18:21:45,828 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 18:21:45,828 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 18:21:45,829 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 18:21:45,831 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 18:21:45,831 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 18:21:45,831 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 18:21:45,832 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 18:21:45,832 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 18:21:45,832 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 18:21:45,833 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 18:21:45,833 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 18:21:45,833 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 18:21:45,833 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 18:21:45,833 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 18:21:45,834 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 18:21:45,834 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 18:21:45,834 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 18:21:45,834 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:21:45,834 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 18:21:45,835 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 18:21:45,836 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 18:21:45,836 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 18:21:45,836 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 18:21:45,836 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 18:21:45,837 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 18:21:45,837 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 18:21:45,897 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 18:21:45,914 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 18:21:45,919 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 18:21:45,921 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 18:21:45,921 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 18:21:45,922 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label31_false-unreach-call.c [2018-10-23 18:21:45,988 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9d06984bd/8e036f477c1c4f3f822b78e14ee3863f/FLAGdb2c53e5e [2018-10-23 18:21:46,741 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 18:21:46,742 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label31_false-unreach-call.c [2018-10-23 18:21:46,765 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9d06984bd/8e036f477c1c4f3f822b78e14ee3863f/FLAGdb2c53e5e [2018-10-23 18:21:46,786 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9d06984bd/8e036f477c1c4f3f822b78e14ee3863f [2018-10-23 18:21:46,798 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 18:21:46,801 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 18:21:46,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 18:21:46,803 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 18:21:46,808 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 18:21:46,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:21:46" (1/1) ... [2018-10-23 18:21:46,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1816ef0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:46, skipping insertion in model container [2018-10-23 18:21:46,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:21:46" (1/1) ... [2018-10-23 18:21:46,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 18:21:46,924 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 18:21:47,633 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:21:47,640 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 18:21:47,940 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:21:47,960 INFO L193 MainTranslator]: Completed translation [2018-10-23 18:21:47,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47 WrapperNode [2018-10-23 18:21:47,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 18:21:47,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 18:21:47,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 18:21:47,963 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 18:21:47,973 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47" (1/1) ... [2018-10-23 18:21:48,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47" (1/1) ... [2018-10-23 18:21:48,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 18:21:48,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 18:21:48,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 18:21:48,326 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 18:21:48,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47" (1/1) ... [2018-10-23 18:21:48,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47" (1/1) ... [2018-10-23 18:21:48,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47" (1/1) ... [2018-10-23 18:21:48,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47" (1/1) ... [2018-10-23 18:21:48,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47" (1/1) ... [2018-10-23 18:21:48,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47" (1/1) ... [2018-10-23 18:21:48,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47" (1/1) ... [2018-10-23 18:21:48,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 18:21:48,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 18:21:48,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 18:21:48,493 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 18:21:48,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47" (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 18:21:48,561 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 18:21:48,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 18:21:48,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 18:21:56,143 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 18:21:56,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:21:56 BoogieIcfgContainer [2018-10-23 18:21:56,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 18:21:56,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 18:21:56,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 18:21:56,149 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 18:21:56,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:21:46" (1/3) ... [2018-10-23 18:21:56,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3678e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:21:56, skipping insertion in model container [2018-10-23 18:21:56,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:21:47" (2/3) ... [2018-10-23 18:21:56,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3678e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:21:56, skipping insertion in model container [2018-10-23 18:21:56,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:21:56" (3/3) ... [2018-10-23 18:21:56,154 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label31_false-unreach-call.c [2018-10-23 18:21:56,168 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 18:21:56,177 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 18:21:56,197 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 18:21:56,241 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 18:21:56,242 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 18:21:56,242 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 18:21:56,242 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 18:21:56,242 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 18:21:56,243 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 18:21:56,243 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 18:21:56,243 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 18:21:56,243 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 18:21:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2018-10-23 18:21:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-23 18:21:56,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:56,285 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:21:56,288 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:56,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:56,297 INFO L82 PathProgramCache]: Analyzing trace with hash 384191218, now seen corresponding path program 1 times [2018-10-23 18:21:56,299 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:56,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:56,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:56,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:56,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:56,530 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 18:21:56,533 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:21:56,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 18:21:56,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:21:56,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:21:56,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:21:56,559 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 3 states. [2018-10-23 18:22:00,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:00,433 INFO L93 Difference]: Finished difference Result 1125 states and 2106 transitions. [2018-10-23 18:22:00,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:22:00,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-23 18:22:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:00,466 INFO L225 Difference]: With dead ends: 1125 [2018-10-23 18:22:00,466 INFO L226 Difference]: Without dead ends: 724 [2018-10-23 18:22:00,479 INFO L605 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 [2018-10-23 18:22:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2018-10-23 18:22:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 724. [2018-10-23 18:22:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-23 18:22:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1169 transitions. [2018-10-23 18:22:00,577 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1169 transitions. Word has length 9 [2018-10-23 18:22:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:00,578 INFO L481 AbstractCegarLoop]: Abstraction has 724 states and 1169 transitions. [2018-10-23 18:22:00,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:22:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1169 transitions. [2018-10-23 18:22:00,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-23 18:22:00,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:00,581 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:22:00,582 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:00,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:00,582 INFO L82 PathProgramCache]: Analyzing trace with hash 615134042, now seen corresponding path program 1 times [2018-10-23 18:22:00,583 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:00,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:00,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:00,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:00,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:22:00,865 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:22:00,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:22:00,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:22:00,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:22:00,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:22:00,870 INFO L87 Difference]: Start difference. First operand 724 states and 1169 transitions. Second operand 4 states. [2018-10-23 18:22:07,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:07,197 INFO L93 Difference]: Finished difference Result 2781 states and 4563 transitions. [2018-10-23 18:22:07,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:22:07,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2018-10-23 18:22:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:07,210 INFO L225 Difference]: With dead ends: 2781 [2018-10-23 18:22:07,210 INFO L226 Difference]: Without dead ends: 2059 [2018-10-23 18:22:07,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:22:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2018-10-23 18:22:07,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1384. [2018-10-23 18:22:07,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2018-10-23 18:22:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2143 transitions. [2018-10-23 18:22:07,268 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2143 transitions. Word has length 81 [2018-10-23 18:22:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:07,269 INFO L481 AbstractCegarLoop]: Abstraction has 1384 states and 2143 transitions. [2018-10-23 18:22:07,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:22:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2143 transitions. [2018-10-23 18:22:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-23 18:22:07,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:07,272 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:22:07,272 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:07,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash 641546084, now seen corresponding path program 1 times [2018-10-23 18:22:07,273 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:07,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:07,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:07,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:07,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:22:07,419 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:22:07,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:22:07,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:22:07,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:22:07,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:22:07,421 INFO L87 Difference]: Start difference. First operand 1384 states and 2143 transitions. Second operand 4 states. [2018-10-23 18:22:15,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:15,355 INFO L93 Difference]: Finished difference Result 3756 states and 5709 transitions. [2018-10-23 18:22:15,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:22:15,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2018-10-23 18:22:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:15,369 INFO L225 Difference]: With dead ends: 3756 [2018-10-23 18:22:15,370 INFO L226 Difference]: Without dead ends: 2374 [2018-10-23 18:22:15,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:22:15,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2018-10-23 18:22:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 2374. [2018-10-23 18:22:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2374 states. [2018-10-23 18:22:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 3352 transitions. [2018-10-23 18:22:15,438 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 3352 transitions. Word has length 85 [2018-10-23 18:22:15,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:15,438 INFO L481 AbstractCegarLoop]: Abstraction has 2374 states and 3352 transitions. [2018-10-23 18:22:15,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:22:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 3352 transitions. [2018-10-23 18:22:15,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-23 18:22:15,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:15,447 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:22:15,447 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:15,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:15,449 INFO L82 PathProgramCache]: Analyzing trace with hash -204332158, now seen corresponding path program 1 times [2018-10-23 18:22:15,449 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:15,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:15,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:15,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:15,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:15,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:22:15,676 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:22:15,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:22:15,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:22:15,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:22:15,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:22:15,678 INFO L87 Difference]: Start difference. First operand 2374 states and 3352 transitions. Second operand 4 states. [2018-10-23 18:22:18,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:18,062 INFO L93 Difference]: Finished difference Result 5406 states and 7808 transitions. [2018-10-23 18:22:18,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:22:18,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2018-10-23 18:22:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:18,081 INFO L225 Difference]: With dead ends: 5406 [2018-10-23 18:22:18,081 INFO L226 Difference]: Without dead ends: 3034 [2018-10-23 18:22:18,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:22:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2018-10-23 18:22:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 2704. [2018-10-23 18:22:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2018-10-23 18:22:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3597 transitions. [2018-10-23 18:22:18,142 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3597 transitions. Word has length 97 [2018-10-23 18:22:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:18,143 INFO L481 AbstractCegarLoop]: Abstraction has 2704 states and 3597 transitions. [2018-10-23 18:22:18,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:22:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3597 transitions. [2018-10-23 18:22:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-23 18:22:18,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:18,149 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 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 18:22:18,149 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:18,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:18,150 INFO L82 PathProgramCache]: Analyzing trace with hash -325996249, now seen corresponding path program 1 times [2018-10-23 18:22:18,150 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:18,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:18,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:18,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:18,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-10-23 18:22:18,426 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:22:18,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 18:22:18,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:22:18,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:22:18,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:22:18,427 INFO L87 Difference]: Start difference. First operand 2704 states and 3597 transitions. Second operand 3 states. [2018-10-23 18:22:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:21,027 INFO L93 Difference]: Finished difference Result 6726 states and 9102 transitions. [2018-10-23 18:22:21,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:22:21,028 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 204 [2018-10-23 18:22:21,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:21,046 INFO L225 Difference]: With dead ends: 6726 [2018-10-23 18:22:21,046 INFO L226 Difference]: Without dead ends: 3344 [2018-10-23 18:22:21,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:22:21,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2018-10-23 18:22:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 3344. [2018-10-23 18:22:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3344 states. [2018-10-23 18:22:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 3748 transitions. [2018-10-23 18:22:21,109 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 3748 transitions. Word has length 204 [2018-10-23 18:22:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:21,110 INFO L481 AbstractCegarLoop]: Abstraction has 3344 states and 3748 transitions. [2018-10-23 18:22:21,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:22:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 3748 transitions. [2018-10-23 18:22:21,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-10-23 18:22:21,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:21,117 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:22:21,118 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:21,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:21,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1149032164, now seen corresponding path program 1 times [2018-10-23 18:22:21,119 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:21,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:21,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:21,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:21,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-23 18:22:21,606 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:22:21,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:22:21,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:22:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:22:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:22:21,607 INFO L87 Difference]: Start difference. First operand 3344 states and 3748 transitions. Second operand 4 states. [2018-10-23 18:22:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:26,857 INFO L93 Difference]: Finished difference Result 12956 states and 14457 transitions. [2018-10-23 18:22:26,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:22:26,858 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 354 [2018-10-23 18:22:26,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:26,896 INFO L225 Difference]: With dead ends: 12956 [2018-10-23 18:22:26,896 INFO L226 Difference]: Without dead ends: 9614 [2018-10-23 18:22:26,903 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 18:22:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9614 states. [2018-10-23 18:22:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9614 to 8624. [2018-10-23 18:22:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8624 states. [2018-10-23 18:22:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8624 states to 8624 states and 9307 transitions. [2018-10-23 18:22:27,046 INFO L78 Accepts]: Start accepts. Automaton has 8624 states and 9307 transitions. Word has length 354 [2018-10-23 18:22:27,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:27,047 INFO L481 AbstractCegarLoop]: Abstraction has 8624 states and 9307 transitions. [2018-10-23 18:22:27,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:22:27,047 INFO L276 IsEmpty]: Start isEmpty. Operand 8624 states and 9307 transitions. [2018-10-23 18:22:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2018-10-23 18:22:27,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:27,058 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 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 18:22:27,058 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:27,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:27,059 INFO L82 PathProgramCache]: Analyzing trace with hash -629323007, now seen corresponding path program 1 times [2018-10-23 18:22:27,059 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:27,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:27,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:27,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:27,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2018-10-23 18:22:27,618 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:22:27,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:22:27,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:22:27,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:22:27,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:22:27,620 INFO L87 Difference]: Start difference. First operand 8624 states and 9307 transitions. Second operand 4 states. [2018-10-23 18:22:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:30,439 INFO L93 Difference]: Finished difference Result 23516 states and 25569 transitions. [2018-10-23 18:22:30,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:22:30,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2018-10-23 18:22:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:30,490 INFO L225 Difference]: With dead ends: 23516 [2018-10-23 18:22:30,490 INFO L226 Difference]: Without dead ends: 14894 [2018-10-23 18:22:30,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 18:22:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14894 states. [2018-10-23 18:22:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14894 to 14234. [2018-10-23 18:22:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14234 states. [2018-10-23 18:22:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14234 states to 14234 states and 15276 transitions. [2018-10-23 18:22:30,699 INFO L78 Accepts]: Start accepts. Automaton has 14234 states and 15276 transitions. Word has length 417 [2018-10-23 18:22:30,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:30,700 INFO L481 AbstractCegarLoop]: Abstraction has 14234 states and 15276 transitions. [2018-10-23 18:22:30,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:22:30,700 INFO L276 IsEmpty]: Start isEmpty. Operand 14234 states and 15276 transitions. [2018-10-23 18:22:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 969 [2018-10-23 18:22:30,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:30,750 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 18:22:30,750 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:30,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1975205529, now seen corresponding path program 1 times [2018-10-23 18:22:30,751 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:30,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:30,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:30,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:30,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:31,413 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 18:22:31,795 WARN L179 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2018-10-23 18:22:31,930 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2018-10-23 18:22:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 687 proven. 0 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2018-10-23 18:22:33,397 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:22:33,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 18:22:33,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 18:22:33,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 18:22:33,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:22:33,401 INFO L87 Difference]: Start difference. First operand 14234 states and 15276 transitions. Second operand 7 states. [2018-10-23 18:22:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:22:41,921 INFO L93 Difference]: Finished difference Result 28803 states and 30891 transitions. [2018-10-23 18:22:41,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:22:41,922 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 968 [2018-10-23 18:22:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:22:41,950 INFO L225 Difference]: With dead ends: 28803 [2018-10-23 18:22:41,950 INFO L226 Difference]: Without dead ends: 14571 [2018-10-23 18:22:41,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:22:41,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14571 states. [2018-10-23 18:22:42,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14571 to 14564. [2018-10-23 18:22:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14564 states. [2018-10-23 18:22:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14564 states to 14564 states and 15608 transitions. [2018-10-23 18:22:42,143 INFO L78 Accepts]: Start accepts. Automaton has 14564 states and 15608 transitions. Word has length 968 [2018-10-23 18:22:42,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:22:42,144 INFO L481 AbstractCegarLoop]: Abstraction has 14564 states and 15608 transitions. [2018-10-23 18:22:42,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 18:22:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 14564 states and 15608 transitions. [2018-10-23 18:22:42,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1085 [2018-10-23 18:22:42,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:22:42,218 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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, 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, 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] [2018-10-23 18:22:42,218 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:22:42,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:22:42,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1693196803, now seen corresponding path program 1 times [2018-10-23 18:22:42,219 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:22:42,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:22:42,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:42,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:42,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:22:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:43,050 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-10-23 18:22:43,370 WARN L179 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-23 18:22:43,732 WARN L179 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-23 18:22:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 1172 proven. 5 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2018-10-23 18:22:44,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:22:44,998 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 18:22:45,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:22:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:22:45,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:22:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 1126 proven. 0 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2018-10-23 18:22:46,112 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:22:46,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-23 18:22:46,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 18:22:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 18:22:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:22:46,116 INFO L87 Difference]: Start difference. First operand 14564 states and 15608 transitions. Second operand 8 states. [2018-10-23 18:22:54,471 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 18:22:57,813 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2018-10-23 18:23:04,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:23:04,885 INFO L93 Difference]: Finished difference Result 41014 states and 44094 transitions. [2018-10-23 18:23:04,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 18:23:04,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1084 [2018-10-23 18:23:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:23:04,932 INFO L225 Difference]: With dead ends: 41014 [2018-10-23 18:23:04,932 INFO L226 Difference]: Without dead ends: 26782 [2018-10-23 18:23:04,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1108 GetRequests, 1092 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-10-23 18:23:04,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26782 states. [2018-10-23 18:23:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26782 to 22484. [2018-10-23 18:23:05,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22484 states. [2018-10-23 18:23:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22484 states to 22484 states and 23599 transitions. [2018-10-23 18:23:05,278 INFO L78 Accepts]: Start accepts. Automaton has 22484 states and 23599 transitions. Word has length 1084 [2018-10-23 18:23:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:23:05,280 INFO L481 AbstractCegarLoop]: Abstraction has 22484 states and 23599 transitions. [2018-10-23 18:23:05,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 18:23:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 22484 states and 23599 transitions. [2018-10-23 18:23:05,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1600 [2018-10-23 18:23:05,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:23:05,335 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:23:05,336 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:23:05,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:23:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash -951319566, now seen corresponding path program 1 times [2018-10-23 18:23:05,337 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:23:05,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:23:05,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:05,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:05,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 4133 trivial. 0 not checked. [2018-10-23 18:23:07,832 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:23:07,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:23:07,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:23:07,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:23:07,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:23:07,836 INFO L87 Difference]: Start difference. First operand 22484 states and 23599 transitions. Second operand 3 states. [2018-10-23 18:23:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:23:10,739 INFO L93 Difference]: Finished difference Result 51895 states and 54507 transitions. [2018-10-23 18:23:10,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:23:10,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1599 [2018-10-23 18:23:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:23:10,778 INFO L225 Difference]: With dead ends: 51895 [2018-10-23 18:23:10,779 INFO L226 Difference]: Without dead ends: 23123 [2018-10-23 18:23:10,807 INFO L605 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 [2018-10-23 18:23:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23123 states. [2018-10-23 18:23:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23123 to 23123. [2018-10-23 18:23:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23123 states. [2018-10-23 18:23:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23123 states to 23123 states and 24062 transitions. [2018-10-23 18:23:11,092 INFO L78 Accepts]: Start accepts. Automaton has 23123 states and 24062 transitions. Word has length 1599 [2018-10-23 18:23:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:23:11,093 INFO L481 AbstractCegarLoop]: Abstraction has 23123 states and 24062 transitions. [2018-10-23 18:23:11,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:23:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 23123 states and 24062 transitions. [2018-10-23 18:23:11,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1816 [2018-10-23 18:23:11,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:23:11,157 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 18:23:11,159 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:23:11,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:23:11,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1095584850, now seen corresponding path program 1 times [2018-10-23 18:23:11,160 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:23:11,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:23:11,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:11,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:11,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:12,603 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:23:12,923 WARN L179 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-10-23 18:23:13,179 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-10-23 18:23:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5564 backedges. 2486 proven. 2627 refuted. 0 times theorem prover too weak. 451 trivial. 0 not checked. [2018-10-23 18:23:16,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:23:16,745 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 18:23:16,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:17,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:17,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:23:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5564 backedges. 4090 proven. 148 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2018-10-23 18:23:19,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:23:19,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2018-10-23 18:23:19,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 18:23:19,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 18:23:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-10-23 18:23:19,991 INFO L87 Difference]: Start difference. First operand 23123 states and 24062 transitions. Second operand 14 states. [2018-10-23 18:23:39,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:23:39,206 INFO L93 Difference]: Finished difference Result 47115 states and 49000 transitions. [2018-10-23 18:23:39,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 18:23:39,206 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1815 [2018-10-23 18:23:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:23:39,235 INFO L225 Difference]: With dead ends: 47115 [2018-10-23 18:23:39,235 INFO L226 Difference]: Without dead ends: 24324 [2018-10-23 18:23:39,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1852 GetRequests, 1822 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2018-10-23 18:23:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24324 states. [2018-10-23 18:23:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24324 to 23098. [2018-10-23 18:23:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23098 states. [2018-10-23 18:23:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23098 states to 23098 states and 23586 transitions. [2018-10-23 18:23:39,528 INFO L78 Accepts]: Start accepts. Automaton has 23098 states and 23586 transitions. Word has length 1815 [2018-10-23 18:23:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:23:39,530 INFO L481 AbstractCegarLoop]: Abstraction has 23098 states and 23586 transitions. [2018-10-23 18:23:39,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 18:23:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 23098 states and 23586 transitions. [2018-10-23 18:23:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1820 [2018-10-23 18:23:39,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:23:39,592 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2018-10-23 18:23:39,593 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:23:39,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:23:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1356241662, now seen corresponding path program 1 times [2018-10-23 18:23:39,594 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:23:39,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:23:39,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:39,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:39,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:40,996 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 18:23:41,609 WARN L179 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-10-23 18:23:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5524 backedges. 3838 proven. 0 refuted. 0 times theorem prover too weak. 1686 trivial. 0 not checked. [2018-10-23 18:23:44,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:23:44,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 18:23:44,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:23:44,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:23:44,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:23:44,719 INFO L87 Difference]: Start difference. First operand 23098 states and 23586 transitions. Second operand 5 states. [2018-10-23 18:23:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:23:47,640 INFO L93 Difference]: Finished difference Result 46198 states and 47176 transitions. [2018-10-23 18:23:47,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 18:23:47,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1819 [2018-10-23 18:23:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:23:47,666 INFO L225 Difference]: With dead ends: 46198 [2018-10-23 18:23:47,666 INFO L226 Difference]: Without dead ends: 23432 [2018-10-23 18:23:47,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:23:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23432 states. [2018-10-23 18:23:47,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23432 to 23098. [2018-10-23 18:23:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23098 states. [2018-10-23 18:23:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23098 states to 23098 states and 23584 transitions. [2018-10-23 18:23:47,976 INFO L78 Accepts]: Start accepts. Automaton has 23098 states and 23584 transitions. Word has length 1819 [2018-10-23 18:23:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:23:47,977 INFO L481 AbstractCegarLoop]: Abstraction has 23098 states and 23584 transitions. [2018-10-23 18:23:47,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:23:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 23098 states and 23584 transitions. [2018-10-23 18:23:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2078 [2018-10-23 18:23:48,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:23:48,055 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:23:48,055 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:23:48,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:23:48,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1027384783, now seen corresponding path program 1 times [2018-10-23 18:23:48,056 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:23:48,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:23:48,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:48,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:48,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:23:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:49,898 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:23:50,041 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 18:23:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7314 backedges. 3428 proven. 251 refuted. 0 times theorem prover too weak. 3635 trivial. 0 not checked. [2018-10-23 18:23:54,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:23:54,657 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 18:23:54,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:23:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:23:55,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:23:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7314 backedges. 4468 proven. 0 refuted. 0 times theorem prover too weak. 2846 trivial. 0 not checked. [2018-10-23 18:23:57,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:23:57,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2018-10-23 18:23:57,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 18:23:57,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 18:23:57,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:23:57,475 INFO L87 Difference]: Start difference. First operand 23098 states and 23584 transitions. Second operand 10 states. [2018-10-23 18:24:06,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:24:06,544 INFO L93 Difference]: Finished difference Result 48023 states and 49035 transitions. [2018-10-23 18:24:06,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 18:24:06,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 2077 [2018-10-23 18:24:06,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:24:06,561 INFO L225 Difference]: With dead ends: 48023 [2018-10-23 18:24:06,561 INFO L226 Difference]: Without dead ends: 19213 [2018-10-23 18:24:06,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2102 GetRequests, 2082 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2018-10-23 18:24:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19213 states. [2018-10-23 18:24:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19213 to 17754. [2018-10-23 18:24:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17754 states. [2018-10-23 18:24:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17754 states to 17754 states and 18025 transitions. [2018-10-23 18:24:06,753 INFO L78 Accepts]: Start accepts. Automaton has 17754 states and 18025 transitions. Word has length 2077 [2018-10-23 18:24:06,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:24:06,754 INFO L481 AbstractCegarLoop]: Abstraction has 17754 states and 18025 transitions. [2018-10-23 18:24:06,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 18:24:06,754 INFO L276 IsEmpty]: Start isEmpty. Operand 17754 states and 18025 transitions. [2018-10-23 18:24:06,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2395 [2018-10-23 18:24:06,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:24:06,810 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:24:06,811 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:24:06,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:24:06,811 INFO L82 PathProgramCache]: Analyzing trace with hash -995315851, now seen corresponding path program 1 times [2018-10-23 18:24:06,812 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:24:06,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:24:06,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:24:06,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:24:06,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:24:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:24:08,200 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:24:08,388 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-10-23 18:24:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10376 backedges. 5716 proven. 2069 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2018-10-23 18:24:12,198 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:24:12,199 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 18:24:12,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:24:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:24:12,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:24:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10376 backedges. 5851 proven. 0 refuted. 0 times theorem prover too weak. 4525 trivial. 0 not checked. [2018-10-23 18:24:15,448 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:24:15,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2018-10-23 18:24:15,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 18:24:15,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 18:24:15,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-10-23 18:24:15,452 INFO L87 Difference]: Start difference. First operand 17754 states and 18025 transitions. Second operand 11 states. [2018-10-23 18:24:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:24:23,723 INFO L93 Difference]: Finished difference Result 35506 states and 36057 transitions. [2018-10-23 18:24:23,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 18:24:23,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 2394 [2018-10-23 18:24:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:24:23,744 INFO L225 Difference]: With dead ends: 35506 [2018-10-23 18:24:23,744 INFO L226 Difference]: Without dead ends: 18744 [2018-10-23 18:24:23,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2408 GetRequests, 2396 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-10-23 18:24:23,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18744 states. [2018-10-23 18:24:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18744 to 18084. [2018-10-23 18:24:23,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18084 states. [2018-10-23 18:24:23,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18084 states to 18084 states and 18345 transitions. [2018-10-23 18:24:23,932 INFO L78 Accepts]: Start accepts. Automaton has 18084 states and 18345 transitions. Word has length 2394 [2018-10-23 18:24:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:24:23,933 INFO L481 AbstractCegarLoop]: Abstraction has 18084 states and 18345 transitions. [2018-10-23 18:24:23,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 18:24:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 18084 states and 18345 transitions. [2018-10-23 18:24:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2608 [2018-10-23 18:24:23,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:24:23,988 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2018-10-23 18:24:23,988 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:24:23,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:24:23,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1457678325, now seen corresponding path program 1 times [2018-10-23 18:24:23,989 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:24:23,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:24:23,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:24:23,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:24:23,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:24:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:24:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11921 backedges. 5661 proven. 572 refuted. 0 times theorem prover too weak. 5688 trivial. 0 not checked. [2018-10-23 18:24:30,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:24:30,933 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:24:30,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:24:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:24:31,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:24:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11921 backedges. 5766 proven. 467 refuted. 0 times theorem prover too weak. 5688 trivial. 0 not checked. [2018-10-23 18:24:36,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:24:36,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2018-10-23 18:24:36,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 18:24:36,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 18:24:36,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:24:36,214 INFO L87 Difference]: Start difference. First operand 18084 states and 18345 transitions. Second operand 9 states. [2018-10-23 18:24:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:24:41,344 INFO L93 Difference]: Finished difference Result 36543 states and 37080 transitions. [2018-10-23 18:24:41,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 18:24:41,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2607 [2018-10-23 18:24:41,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:24:41,361 INFO L225 Difference]: With dead ends: 36543 [2018-10-23 18:24:41,362 INFO L226 Difference]: Without dead ends: 19451 [2018-10-23 18:24:41,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2620 GetRequests, 2607 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2018-10-23 18:24:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2018-10-23 18:24:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 18743. [2018-10-23 18:24:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18743 states. [2018-10-23 18:24:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18743 states to 18743 states and 18983 transitions. [2018-10-23 18:24:41,623 INFO L78 Accepts]: Start accepts. Automaton has 18743 states and 18983 transitions. Word has length 2607 [2018-10-23 18:24:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:24:41,624 INFO L481 AbstractCegarLoop]: Abstraction has 18743 states and 18983 transitions. [2018-10-23 18:24:41,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 18:24:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 18743 states and 18983 transitions. [2018-10-23 18:24:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2630 [2018-10-23 18:24:41,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:24:41,674 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 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, 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, 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] [2018-10-23 18:24:41,674 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:24:41,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:24:41,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1317473214, now seen corresponding path program 1 times [2018-10-23 18:24:41,675 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:24:41,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:24:41,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:24:41,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:24:41,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:24:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:24:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12103 backedges. 8870 proven. 985 refuted. 0 times theorem prover too weak. 2248 trivial. 0 not checked. [2018-10-23 18:24:50,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:24:50,385 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 18:24:50,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:24:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:24:51,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:25:19,377 WARN L179 SmtUtils]: Spent 27.95 s on a formula simplification. DAG size of input: 427 DAG size of output: 23 [2018-10-23 18:25:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12103 backedges. 8095 proven. 0 refuted. 0 times theorem prover too weak. 4008 trivial. 0 not checked. [2018-10-23 18:25:25,464 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:25:25,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2018-10-23 18:25:25,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 18:25:25,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 18:25:25,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:25:25,468 INFO L87 Difference]: Start difference. First operand 18743 states and 18983 transitions. Second operand 9 states. Received shutdown request... [2018-10-23 18:25:25,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:25:25,647 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 18:25:25,653 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 18:25:25,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:25:25 BoogieIcfgContainer [2018-10-23 18:25:25,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 18:25:25,654 INFO L168 Benchmark]: Toolchain (without parser) took 218854.36 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -963.4 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-23 18:25:25,657 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 18:25:25,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1159.43 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-23 18:25:25,658 INFO L168 Benchmark]: Boogie Procedure Inliner took 363.00 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -851.0 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2018-10-23 18:25:25,664 INFO L168 Benchmark]: Boogie Preprocessor took 165.58 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2018-10-23 18:25:25,665 INFO L168 Benchmark]: RCFGBuilder took 7652.81 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: 280.7 MB). Peak memory consumption was 280.7 MB. Max. memory is 7.1 GB. [2018-10-23 18:25:25,668 INFO L168 Benchmark]: TraceAbstraction took 209508.28 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 2.4 GB in the end (delta: -481.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-10-23 18:25:25,674 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1159.43 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: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 363.00 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -851.0 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 165.58 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7652.81 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: 280.7 MB). Peak memory consumption was 280.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 209508.28 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 2.4 GB in the end (delta: -481.3 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 31). Cancelled while BasicCegarLoop was constructing difference of abstraction (18743states) and FLOYD_HOARE automaton (currently 4 states, 9 states before enhancement),while ReachableStatesComputation was computing reachable states (55 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 397 locations, 1 error locations. TIMEOUT Result, 209.4s OverallTime, 16 OverallIterations, 13 TraceHistogramMax, 106.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3135 SDtfs, 20246 SDslu, 1742 SDs, 0 SdLazy, 69137 SolverSat, 4185 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 89.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12769 GetRequests, 12642 SyntacticMatches, 26 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 36.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23123occurred in iteration=10, 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: 2.6s AutomataMinimizationTime, 15 MinimizatonAttempts, 11347 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 63.9s InterpolantComputationTime, 30845 NumberOfCodeBlocks, 30845 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 30823 ConstructedInterpolants, 212 QuantifiedInterpolants, 215043391 SizeOfPredicates, 6 NumberOfNonLiveVariables, 14352 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 22 InterpolantComputations, 14 PerfectInterpolantSequences, 102989/110113 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown