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/loop-crafted/simple_array_index_value_true-unreach-call3_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:55:11,555 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:55:11,557 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:55:11,572 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:55:11,572 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:55:11,573 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:55:11,576 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:55:11,578 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:55:11,581 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:55:11,584 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:55:11,585 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:55:11,585 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:55:11,587 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:55:11,589 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:55:11,597 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:55:11,598 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:55:11,599 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:55:11,601 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:55:11,603 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:55:11,606 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:55:11,608 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:55:11,610 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:55:11,612 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:55:11,624 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 [2018-10-24 11:55:11,652 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:55:11,652 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:55:11,653 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:55:11,653 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:55:11,654 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:55:11,654 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:55:11,654 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:55:11,655 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:55:11,655 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:55:11,655 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:55:11,655 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:55:11,655 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:55:11,655 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:55:11,656 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:55:11,656 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:55:11,656 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:55:11,656 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:55:11,656 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:55:11,657 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:55:11,657 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:55:11,657 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:55:11,657 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:55:11,657 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:55:11,658 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:55:11,658 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:55:11,658 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:55:11,658 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:55:11,658 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:55:11,722 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:55:11,737 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:55:11,741 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:55:11,743 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:55:11,743 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:55:11,745 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call3_true-termination.i [2018-10-24 11:55:11,814 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e3e83d72b/165e54d396424d6e90154505756821a5/FLAGe2efc869c [2018-10-24 11:55:12,239 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:55:12,240 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call3_true-termination.i [2018-10-24 11:55:12,247 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e3e83d72b/165e54d396424d6e90154505756821a5/FLAGe2efc869c [2018-10-24 11:55:12,263 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/e3e83d72b/165e54d396424d6e90154505756821a5 [2018-10-24 11:55:12,272 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:55:12,274 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:55:12,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:55:12,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:55:12,279 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:55:12,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:55:12" (1/1) ... [2018-10-24 11:55:12,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ef6c47b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12, skipping insertion in model container [2018-10-24 11:55:12,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:55:12" (1/1) ... [2018-10-24 11:55:12,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:55:12,320 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:55:12,558 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:55:12,565 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:55:12,594 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:55:12,619 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:55:12,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12 WrapperNode [2018-10-24 11:55:12,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:55:12,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:55:12,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:55:12,621 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:55:12,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12" (1/1) ... [2018-10-24 11:55:12,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12" (1/1) ... [2018-10-24 11:55:12,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:55:12,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:55:12,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:55:12,666 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:55:12,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12" (1/1) ... [2018-10-24 11:55:12,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12" (1/1) ... [2018-10-24 11:55:12,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12" (1/1) ... [2018-10-24 11:55:12,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12" (1/1) ... [2018-10-24 11:55:12,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12" (1/1) ... [2018-10-24 11:55:12,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12" (1/1) ... [2018-10-24 11:55:12,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12" (1/1) ... [2018-10-24 11:55:12,691 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:55:12,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:55:12,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:55:12,692 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:55:12,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12" (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 [2018-10-24 11:55:12,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:55:12,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:55:12,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-24 11:55:13,194 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:55:13,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:55:13 BoogieIcfgContainer [2018-10-24 11:55:13,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:55:13,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:55:13,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:55:13,200 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:55:13,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:55:12" (1/3) ... [2018-10-24 11:55:13,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c4339c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:55:13, skipping insertion in model container [2018-10-24 11:55:13,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:55:12" (2/3) ... [2018-10-24 11:55:13,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c4339c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:55:13, skipping insertion in model container [2018-10-24 11:55:13,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:55:13" (3/3) ... [2018-10-24 11:55:13,204 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_true-unreach-call3_true-termination.i [2018-10-24 11:55:13,214 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:55:13,223 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:55:13,243 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:55:13,278 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:55:13,279 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:55:13,279 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:55:13,280 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:55:13,280 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:55:13,280 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:55:13,280 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:55:13,280 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:55:13,280 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:55:13,296 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2018-10-24 11:55:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-24 11:55:13,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:13,306 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:13,308 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:13,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:13,314 INFO L82 PathProgramCache]: Analyzing trace with hash 781418611, now seen corresponding path program 1 times [2018-10-24 11:55:13,316 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:13,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:13,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:13,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:55:13,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:13,446 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:55:13,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:55:13,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:55:13,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:55:13,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:55:13,466 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2018-10-24 11:55:13,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:13,482 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2018-10-24 11:55:13,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:55:13,483 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-24 11:55:13,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:13,496 INFO L225 Difference]: With dead ends: 40 [2018-10-24 11:55:13,498 INFO L226 Difference]: Without dead ends: 18 [2018-10-24 11:55:13,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:55:13,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-24 11:55:13,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-24 11:55:13,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 11:55:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-24 11:55:13,532 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2018-10-24 11:55:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:13,532 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-24 11:55:13,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:55:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-24 11:55:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 11:55:13,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:13,533 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:13,534 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:13,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:13,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1279355689, now seen corresponding path program 1 times [2018-10-24 11:55:13,534 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:13,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:13,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:13,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:55:13,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:13,618 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:55:13,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 11:55:13,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 11:55:13,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 11:55:13,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-24 11:55:13,620 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2018-10-24 11:55:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:13,741 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-10-24 11:55:13,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:55:13,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-24 11:55:13,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:13,746 INFO L225 Difference]: With dead ends: 33 [2018-10-24 11:55:13,746 INFO L226 Difference]: Without dead ends: 31 [2018-10-24 11:55:13,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:55:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-24 11:55:13,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-10-24 11:55:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-24 11:55:13,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-24 11:55:13,755 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2018-10-24 11:55:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:13,756 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-24 11:55:13,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 11:55:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-24 11:55:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 11:55:13,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:13,757 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:13,757 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:13,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:13,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1045835244, now seen corresponding path program 1 times [2018-10-24 11:55:13,758 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:13,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:13,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:13,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:55:13,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:13,849 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:55:13,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:55:13,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:55:13,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:55:13,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:55:13,850 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2018-10-24 11:55:13,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:13,904 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2018-10-24 11:55:13,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:55:13,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-10-24 11:55:13,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:13,906 INFO L225 Difference]: With dead ends: 53 [2018-10-24 11:55:13,906 INFO L226 Difference]: Without dead ends: 37 [2018-10-24 11:55:13,906 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 [2018-10-24 11:55:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-24 11:55:13,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-24 11:55:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-24 11:55:13,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-24 11:55:13,911 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2018-10-24 11:55:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:13,911 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-24 11:55:13,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:55:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-24 11:55:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-24 11:55:13,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:13,913 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:13,913 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:13,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1436282830, now seen corresponding path program 1 times [2018-10-24 11:55:13,914 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:13,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:13,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:13,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:55:13,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:14,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:14,032 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 [2018-10-24 11:55:14,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:55:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:14,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:14,307 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-10-24 11:55:14,322 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-24 11:55:14,323 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:14,349 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:14,379 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:14,380 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2018-10-24 11:55:14,629 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2018-10-24 11:55:14,644 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2018-10-24 11:55:14,645 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:14,663 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:14,666 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:14,666 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2018-10-24 11:55:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:14,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:14,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2018-10-24 11:55:14,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:55:14,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:55:14,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:55:14,764 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 10 states. [2018-10-24 11:55:16,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:16,083 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2018-10-24 11:55:16,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 11:55:16,084 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-24 11:55:16,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:16,086 INFO L225 Difference]: With dead ends: 154 [2018-10-24 11:55:16,086 INFO L226 Difference]: Without dead ends: 138 [2018-10-24 11:55:16,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:55:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-24 11:55:16,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 34. [2018-10-24 11:55:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-24 11:55:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2018-10-24 11:55:16,097 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 17 [2018-10-24 11:55:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:16,097 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2018-10-24 11:55:16,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:55:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2018-10-24 11:55:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-24 11:55:16,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:16,099 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:16,099 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:16,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:16,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1554630718, now seen corresponding path program 2 times [2018-10-24 11:55:16,100 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:16,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:16,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:16,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:55:16,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:16,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:16,482 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 [2018-10-24 11:55:16,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:55:16,526 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:55:16,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:16,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:16,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:16,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-10-24 11:55:16,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:55:16,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:55:16,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:55:16,616 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2018-10-24 11:55:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:16,942 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2018-10-24 11:55:16,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:55:16,947 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2018-10-24 11:55:16,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:16,948 INFO L225 Difference]: With dead ends: 112 [2018-10-24 11:55:16,949 INFO L226 Difference]: Without dead ends: 88 [2018-10-24 11:55:16,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:55:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-24 11:55:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 28. [2018-10-24 11:55:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-24 11:55:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-24 11:55:16,962 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2018-10-24 11:55:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:16,965 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-24 11:55:16,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:55:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-24 11:55:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 11:55:16,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:16,966 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:16,966 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:16,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:16,967 INFO L82 PathProgramCache]: Analyzing trace with hash 2110104060, now seen corresponding path program 3 times [2018-10-24 11:55:16,967 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:16,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:16,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:16,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:16,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:20,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:20,023 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 [2018-10-24 11:55:20,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:55:20,166 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-24 11:55:20,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:20,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:20,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:20,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-10-24 11:55:20,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:55:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:55:20,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2018-10-24 11:55:20,273 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2018-10-24 11:55:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:20,496 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2018-10-24 11:55:20,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:55:20,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2018-10-24 11:55:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:20,498 INFO L225 Difference]: With dead ends: 121 [2018-10-24 11:55:20,498 INFO L226 Difference]: Without dead ends: 105 [2018-10-24 11:55:20,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2018-10-24 11:55:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-24 11:55:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 30. [2018-10-24 11:55:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-24 11:55:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-24 11:55:20,505 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2018-10-24 11:55:20,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:20,505 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-24 11:55:20,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:55:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-24 11:55:20,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-24 11:55:20,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:20,506 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:20,507 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:20,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:20,507 INFO L82 PathProgramCache]: Analyzing trace with hash 2047042998, now seen corresponding path program 4 times [2018-10-24 11:55:20,507 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:20,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:20,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:20,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:20,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:23,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:23,483 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 [2018-10-24 11:55:23,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:55:23,538 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:55:23,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:23,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:23,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:23,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-10-24 11:55:23,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:55:23,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:55:23,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2018-10-24 11:55:23,870 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2018-10-24 11:55:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:24,226 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2018-10-24 11:55:24,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 11:55:24,229 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-10-24 11:55:24,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:24,230 INFO L225 Difference]: With dead ends: 138 [2018-10-24 11:55:24,231 INFO L226 Difference]: Without dead ends: 122 [2018-10-24 11:55:24,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2018-10-24 11:55:24,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-24 11:55:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 32. [2018-10-24 11:55:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-24 11:55:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2018-10-24 11:55:24,241 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 25 [2018-10-24 11:55:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:24,241 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2018-10-24 11:55:24,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:55:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2018-10-24 11:55:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-24 11:55:24,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:24,244 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:24,244 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:24,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:24,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1574904560, now seen corresponding path program 5 times [2018-10-24 11:55:24,248 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:24,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:24,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:24,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:24,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:26,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:26,749 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 [2018-10-24 11:55:26,757 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:55:28,238 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-24 11:55:28,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:28,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:28,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:28,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-10-24 11:55:28,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:55:28,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:55:28,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2018-10-24 11:55:28,363 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2018-10-24 11:55:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:55:28,741 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2018-10-24 11:55:28,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:55:28,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2018-10-24 11:55:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:55:28,743 INFO L225 Difference]: With dead ends: 155 [2018-10-24 11:55:28,744 INFO L226 Difference]: Without dead ends: 139 [2018-10-24 11:55:28,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2018-10-24 11:55:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-24 11:55:28,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 34. [2018-10-24 11:55:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-24 11:55:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-24 11:55:28,750 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 27 [2018-10-24 11:55:28,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:55:28,754 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-24 11:55:28,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:55:28,754 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-24 11:55:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-24 11:55:28,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:55:28,755 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:55:28,756 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:55:28,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:55:28,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1178568278, now seen corresponding path program 6 times [2018-10-24 11:55:28,756 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:55:28,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:55:28,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:28,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:55:28,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:55:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:55:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:35,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:55:35,744 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 [2018-10-24 11:55:35,761 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:55:42,388 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-24 11:55:42,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:55:42,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:55:42,494 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 8 [2018-10-24 11:55:42,497 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-24 11:55:42,497 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:42,499 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:42,504 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:42,505 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2018-10-24 11:55:42,542 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2018-10-24 11:55:42,545 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:55:42,547 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 23 [2018-10-24 11:55:42,547 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:42,558 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:42,568 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:42,568 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:11 [2018-10-24 11:55:42,604 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2018-10-24 11:55:42,629 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 38 [2018-10-24 11:55:42,631 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 11:55:42,649 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-24 11:55:42,682 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-24 11:55:42,683 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:41 [2018-10-24 11:55:42,796 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 39 [2018-10-24 11:55:42,800 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:55:42,803 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 35 [2018-10-24 11:55:42,804 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:42,819 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:42,872 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 29 [2018-10-24 11:55:42,875 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-24 11:55:42,876 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:42,884 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:42,917 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-24 11:55:42,917 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:84, output treesize:44 [2018-10-24 11:55:43,028 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 36 [2018-10-24 11:55:43,035 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-24 11:55:43,036 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,084 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,129 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 49 [2018-10-24 11:55:43,133 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:55:43,135 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 35 [2018-10-24 11:55:43,136 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,162 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,200 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-24 11:55:43,200 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:94, output treesize:54 [2018-10-24 11:55:43,308 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2018-10-24 11:55:43,348 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:55:43,372 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 19 [2018-10-24 11:55:43,373 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,409 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,481 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 32 [2018-10-24 11:55:43,485 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2018-10-24 11:55:43,485 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,520 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,565 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-24 11:55:43,565 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:96, output treesize:52 [2018-10-24 11:55:43,669 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 36 [2018-10-24 11:55:43,674 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-24 11:55:43,674 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,686 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,765 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 59 [2018-10-24 11:55:43,771 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 11:55:43,775 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 35 [2018-10-24 11:55:43,775 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,810 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 11:55:43,855 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-24 11:55:43,856 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:104, output treesize:59 [2018-10-24 11:55:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:55:44,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:55:44,310 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2018-10-24 11:55:44,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:55:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:55:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=366, Unknown=3, NotChecked=0, Total=420 [2018-10-24 11:55:44,312 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 21 states. [2018-10-24 11:55:44,578 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2018-10-24 11:56:01,893 WARN L179 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2018-10-24 11:56:16,744 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 18 [2018-10-24 11:56:25,669 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 18 [2018-10-24 11:56:29,445 WARN L179 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 19 [2018-10-24 11:56:42,483 WARN L179 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 19 [2018-10-24 11:56:49,444 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2018-10-24 11:57:23,209 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 32 [2018-10-24 11:57:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:23,331 INFO L93 Difference]: Finished difference Result 181 states and 194 transitions. [2018-10-24 11:57:23,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:57:23,332 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2018-10-24 11:57:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:23,333 INFO L225 Difference]: With dead ends: 181 [2018-10-24 11:57:23,333 INFO L226 Difference]: Without dead ends: 165 [2018-10-24 11:57:23,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=160, Invalid=890, Unknown=6, NotChecked=0, Total=1056 [2018-10-24 11:57:23,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-24 11:57:23,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 41. [2018-10-24 11:57:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-24 11:57:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-24 11:57:23,340 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 29 [2018-10-24 11:57:23,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:23,341 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-24 11:57:23,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:57:23,341 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-24 11:57:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 11:57:23,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:23,342 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:23,343 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:23,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:23,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1032245036, now seen corresponding path program 1 times [2018-10-24 11:57:23,343 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:23,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:23,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:23,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:23,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 11:57:27,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:27,934 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:27,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:27,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 11:57:28,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:28,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-10-24 11:57:28,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:57:28,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:57:28,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=298, Unknown=1, NotChecked=0, Total=342 [2018-10-24 11:57:28,346 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 19 states. [2018-10-24 11:57:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:29,735 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2018-10-24 11:57:29,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:57:29,735 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2018-10-24 11:57:29,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:29,736 INFO L225 Difference]: With dead ends: 188 [2018-10-24 11:57:29,737 INFO L226 Difference]: Without dead ends: 167 [2018-10-24 11:57:29,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=43, Invalid=298, Unknown=1, NotChecked=0, Total=342 [2018-10-24 11:57:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-24 11:57:29,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 43. [2018-10-24 11:57:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-24 11:57:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-24 11:57:29,745 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2018-10-24 11:57:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:29,745 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-24 11:57:29,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:57:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-24 11:57:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-24 11:57:29,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:29,746 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:29,747 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:29,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:29,747 INFO L82 PathProgramCache]: Analyzing trace with hash 421009498, now seen corresponding path program 2 times [2018-10-24 11:57:29,747 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:29,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:29,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:29,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:57:29,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 11:57:36,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:36,156 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:36,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:57:36,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:57:36,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:57:36,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:57:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 11:57:36,370 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:57:36,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-10-24 11:57:36,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:57:36,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:57:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=370, Unknown=2, NotChecked=0, Total=420 [2018-10-24 11:57:36,372 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 21 states. [2018-10-24 11:57:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:57:37,200 INFO L93 Difference]: Finished difference Result 205 states and 218 transitions. [2018-10-24 11:57:37,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:57:37,201 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2018-10-24 11:57:37,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:57:37,202 INFO L225 Difference]: With dead ends: 205 [2018-10-24 11:57:37,202 INFO L226 Difference]: Without dead ends: 184 [2018-10-24 11:57:37,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=48, Invalid=370, Unknown=2, NotChecked=0, Total=420 [2018-10-24 11:57:37,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-24 11:57:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 45. [2018-10-24 11:57:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-24 11:57:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-24 11:57:37,211 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2018-10-24 11:57:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:57:37,211 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-24 11:57:37,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:57:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-24 11:57:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-24 11:57:37,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:57:37,212 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:57:37,212 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:57:37,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:57:37,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1134245472, now seen corresponding path program 3 times [2018-10-24 11:57:37,213 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:57:37,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:57:37,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:37,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:57:37,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:57:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:57:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 11:57:44,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:57:44,994 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:57:45,005 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:58:42,388 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-24 11:58:42,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:42,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 11:58:42,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:42,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2018-10-24 11:58:42,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 11:58:42,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 11:58:42,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=451, Unknown=2, NotChecked=0, Total=506 [2018-10-24 11:58:42,675 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 23 states. [2018-10-24 11:58:43,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:43,628 INFO L93 Difference]: Finished difference Result 222 states and 236 transitions. [2018-10-24 11:58:43,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:58:43,629 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-24 11:58:43,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:43,630 INFO L225 Difference]: With dead ends: 222 [2018-10-24 11:58:43,631 INFO L226 Difference]: Without dead ends: 201 [2018-10-24 11:58:43,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=53, Invalid=451, Unknown=2, NotChecked=0, Total=506 [2018-10-24 11:58:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-24 11:58:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 47. [2018-10-24 11:58:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-24 11:58:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-10-24 11:58:43,639 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-10-24 11:58:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:43,639 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-10-24 11:58:43,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 11:58:43,640 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-10-24 11:58:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-24 11:58:43,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:43,641 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:43,641 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:43,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:43,641 INFO L82 PathProgramCache]: Analyzing trace with hash -640750874, now seen corresponding path program 4 times [2018-10-24 11:58:43,641 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:43,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:43,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:43,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:43,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:43,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:58:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 11:58:51,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:58:51,424 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:58:51,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:58:51,472 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:58:51,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:58:51,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:58:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 11:58:51,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:58:51,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-10-24 11:58:51,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:58:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:58:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=541, Unknown=1, NotChecked=0, Total=600 [2018-10-24 11:58:51,721 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 25 states. [2018-10-24 11:58:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:58:52,812 INFO L93 Difference]: Finished difference Result 239 states and 254 transitions. [2018-10-24 11:58:52,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 11:58:52,813 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2018-10-24 11:58:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:58:52,814 INFO L225 Difference]: With dead ends: 239 [2018-10-24 11:58:52,814 INFO L226 Difference]: Without dead ends: 218 [2018-10-24 11:58:52,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=58, Invalid=541, Unknown=1, NotChecked=0, Total=600 [2018-10-24 11:58:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-24 11:58:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 49. [2018-10-24 11:58:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-24 11:58:52,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-24 11:58:52,824 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2018-10-24 11:58:52,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:58:52,825 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-24 11:58:52,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:58:52,825 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-24 11:58:52,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-24 11:58:52,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:58:52,826 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:58:52,826 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:58:52,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:58:52,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1310222868, now seen corresponding path program 5 times [2018-10-24 11:58:52,827 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:58:52,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:58:52,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:52,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:58:52,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:58:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:03,200 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 11:59:03,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:03,201 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:03,210 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown