java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:32:43,233 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:32:43,235 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:32:43,247 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:32:43,247 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:32:43,248 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:32:43,249 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:32:43,251 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:32:43,253 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:32:43,254 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:32:43,255 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 14:32:43,283 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 14:32:43,299 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:32:43,299 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:32:43,300 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:32:43,300 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:32:43,301 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:32:43,301 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:32:43,301 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:32:43,301 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:32:43,301 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:32:43,302 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:32:43,302 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:32:43,302 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:32:43,302 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:32:43,302 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:32:43,303 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:32:43,303 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:32:43,303 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:32:43,303 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:32:43,303 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:32:43,303 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:32:43,304 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:32:43,305 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:32:43,305 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:32:43,305 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:32:43,305 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:32:43,305 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:32:43,306 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:32:43,306 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:32:43,306 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:32:43,306 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:32:43,306 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:32:43,374 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:32:43,390 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:32:43,397 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:32:43,398 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:32:43,399 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:32:43,400 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl [2018-10-04 14:32:43,400 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple1.i_3.bpl' [2018-10-04 14:32:43,461 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:32:43,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:32:43,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:32:43,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:32:43,464 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:32:43,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:43" (1/1) ... [2018-10-04 14:32:43,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:43" (1/1) ... [2018-10-04 14:32:43,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:32:43,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:32:43,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:32:43,510 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:32:43,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:43" (1/1) ... [2018-10-04 14:32:43,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:43" (1/1) ... [2018-10-04 14:32:43,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:43" (1/1) ... [2018-10-04 14:32:43,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:43" (1/1) ... [2018-10-04 14:32:43,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:43" (1/1) ... [2018-10-04 14:32:43,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:43" (1/1) ... [2018-10-04 14:32:43,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:43" (1/1) ... [2018-10-04 14:32:43,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:32:43,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:32:43,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:32:43,534 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:32:43,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:32:43,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 14:32:43,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 14:32:43,758 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 14:32:43,759 INFO L202 PluginConnector]: Adding new model simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:32:43 BoogieIcfgContainer [2018-10-04 14:32:43,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:32:43,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:32:43,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:32:43,764 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:32:43,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:32:43" (1/2) ... [2018-10-04 14:32:43,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2404d452 and model type simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:32:43, skipping insertion in model container [2018-10-04 14:32:43,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:32:43" (2/2) ... [2018-10-04 14:32:43,767 INFO L112 eAbstractionObserver]: Analyzing ICFG simple1.i_3.bpl [2018-10-04 14:32:43,777 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:32:43,785 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:32:43,839 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:32:43,840 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:32:43,840 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:32:43,840 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:32:43,840 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:32:43,841 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:32:43,843 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:32:43,844 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:32:43,844 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:32:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 14:32:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 14:32:43,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:43,883 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 14:32:43,884 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:43,894 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:43,894 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 14:32:43,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:43,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:43,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:43,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:43,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:44,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:44,082 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:32:44,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 14:32:44,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:32:44,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:32:44,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:44,105 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 14:32:44,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:44,149 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 14:32:44,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:32:44,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 14:32:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:44,163 INFO L225 Difference]: With dead ends: 11 [2018-10-04 14:32:44,164 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 14:32:44,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 14:32:44,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 14:32:44,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 14:32:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 14:32:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 14:32:44,198 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 14:32:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:44,199 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 14:32:44,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:32:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 14:32:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:32:44,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:44,200 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 14:32:44,200 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:44,200 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:44,201 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 14:32:44,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:44,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:44,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:44,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:44,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:44,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:44,316 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:44,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:44,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:44,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:44,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 14:32:44,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:32:44,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:32:44,453 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:44,453 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-04 14:32:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:44,536 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 14:32:44,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:32:44,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 14:32:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:44,542 INFO L225 Difference]: With dead ends: 11 [2018-10-04 14:32:44,543 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 14:32:44,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 2 [2018-10-04 14:32:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 14:32:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 14:32:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:32:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 14:32:44,547 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 14:32:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:44,549 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 14:32:44,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:32:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 14:32:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:32:44,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:44,550 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 14:32:44,551 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:44,551 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:44,551 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-04 14:32:44,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:44,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:44,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:44,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:44,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:44,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:44,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:44,723 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:32:44,737 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:32:44,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:44,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:44,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:44,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 14:32:44,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:32:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:32:44,825 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:44,826 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-04 14:32:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:44,898 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 14:32:44,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:32:44,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 14:32:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:44,899 INFO L225 Difference]: With dead ends: 13 [2018-10-04 14:32:44,900 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:32:44,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 14:32:44,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:32:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 14:32:44,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:32:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 14:32:44,905 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 14:32:44,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:44,905 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 14:32:44,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:32:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 14:32:44,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:32:44,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:44,906 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 14:32:44,907 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:44,907 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:44,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-04 14:32:44,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:44,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:44,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:44,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:44,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:45,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:45,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:32:45,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:32:45,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 14:32:45,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:45,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:45,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:45,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 14:32:45,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:32:45,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:32:45,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:45,394 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-04 14:32:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:45,444 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 14:32:45,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:32:45,445 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 14:32:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:45,446 INFO L225 Difference]: With dead ends: 15 [2018-10-04 14:32:45,446 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:32:45,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 4 [2018-10-04 14:32:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:32:45,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 14:32:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 14:32:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 14:32:45,450 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 14:32:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:45,451 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 14:32:45,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:32:45,451 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 14:32:45,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 14:32:45,451 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:45,452 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 14:32:45,452 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:45,452 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:45,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-04 14:32:45,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:45,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:45,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:45,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:45,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:45,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:45,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-04 14:32:45,601 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:32:45,617 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:32:45,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:45,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:45,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:45,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 14:32:45,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 14:32:45,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 14:32:45,721 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:45,721 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-04 14:32:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:45,874 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 14:32:45,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:32:45,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 14:32:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:45,876 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:32:45,876 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 14:32:45,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 5 [2018-10-04 14:32:45,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 14:32:45,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 14:32:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 14:32:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 14:32:45,881 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 14:32:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:45,882 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 14:32:45,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 14:32:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 14:32:45,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:32:45,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:45,883 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 14:32:45,883 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:45,883 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-04 14:32:45,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:45,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:45,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:45,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:45,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:46,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:46,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-04 14:32:46,047 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:32:46,085 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 14:32:46,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:46,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:46,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:46,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 14:32:46,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:32:46,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:32:46,199 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:46,200 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-04 14:32:46,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:46,376 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 14:32:46,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:32:46,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 14:32:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:46,377 INFO L225 Difference]: With dead ends: 19 [2018-10-04 14:32:46,377 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 14:32:46,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 14:32:46,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 14:32:46,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 14:32:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 14:32:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 14:32:46,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 14:32:46,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:46,383 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 14:32:46,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:32:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 14:32:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:32:46,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:46,384 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 14:32:46,384 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:46,385 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:46,385 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-04 14:32:46,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:46,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:46,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:46,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:46,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:46,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:46,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-04 14:32:46,984 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:32:47,031 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 14:32:47,031 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:47,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:47,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:47,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 14:32:47,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:32:47,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:32:47,128 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:47,128 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-04 14:32:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:47,213 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 14:32:47,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:32:47,217 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 14:32:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:47,218 INFO L225 Difference]: With dead ends: 21 [2018-10-04 14:32:47,218 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:32:47,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 7 [2018-10-04 14:32:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:32:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 14:32:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:32:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 14:32:47,224 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 14:32:47,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:47,224 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 14:32:47,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:32:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 14:32:47,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:32:47,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:47,225 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 14:32:47,226 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:47,226 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:47,226 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-04 14:32:47,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:47,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:47,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:47,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:47,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:47,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:47,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-04 14:32:47,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:47,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:47,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:47,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 14:32:47,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:32:47,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:32:47,553 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:47,554 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-04 14:32:47,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:47,642 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 14:32:47,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:32:47,643 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 14:32:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:47,644 INFO L225 Difference]: With dead ends: 23 [2018-10-04 14:32:47,644 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 14:32:47,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 8 [2018-10-04 14:32:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 14:32:47,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 14:32:47,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:32:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 14:32:47,650 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 14:32:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:47,650 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 14:32:47,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:32:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 14:32:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:32:47,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:47,652 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 14:32:47,652 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:47,652 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:47,652 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-04 14:32:47,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:47,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:47,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:47,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:32:47,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:47,867 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:47,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:47,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-04 14:32:47,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:32:47,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:32:47,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:47,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:48,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:48,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 14:32:48,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:32:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:32:48,020 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:48,020 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-04 14:32:48,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:48,135 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 14:32:48,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:32:48,137 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 14:32:48,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:48,138 INFO L225 Difference]: With dead ends: 25 [2018-10-04 14:32:48,138 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:32:48,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 9 [2018-10-04 14:32:48,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:32:48,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 14:32:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 14:32:48,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 14:32:48,145 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 14:32:48,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:48,146 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 14:32:48,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:32:48,146 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 14:32:48,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 14:32:48,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:48,147 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 14:32:48,147 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:48,147 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:48,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-04 14:32:48,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:48,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:48,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:48,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:48,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:48,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:48,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-04 14:32:48,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:32:48,654 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 14:32:48,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:48,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:48,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:48,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 14:32:48,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:32:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:32:48,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:48,755 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-04 14:32:48,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:48,890 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 14:32:48,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:32:48,891 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 14:32:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:48,892 INFO L225 Difference]: With dead ends: 27 [2018-10-04 14:32:48,892 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 14:32:48,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 10 [2018-10-04 14:32:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 14:32:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 14:32:48,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:32:48,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 14:32:48,901 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 14:32:48,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:48,901 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 14:32:48,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:32:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 14:32:48,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:32:48,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:48,902 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-04 14:32:48,903 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:48,903 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:48,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-04 14:32:48,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:48,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:48,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:48,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:48,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:49,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:49,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-04 14:32:49,147 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:32:49,162 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:32:49,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:49,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:49,548 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:49,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 14:32:49,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 14:32:49,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 14:32:49,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:49,550 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-04 14:32:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:49,811 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 14:32:49,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:32:49,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 14:32:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:49,813 INFO L225 Difference]: With dead ends: 29 [2018-10-04 14:32:49,813 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:32:49,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 11 [2018-10-04 14:32:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:32:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 14:32:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 14:32:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 14:32:49,819 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 14:32:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:49,820 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 14:32:49,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 14:32:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 14:32:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:32:49,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:49,821 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 14:32:49,822 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:49,822 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:49,822 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-04 14:32:49,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:49,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:49,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:49,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:49,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:32:50,074 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:50,074 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-10-04 14:32:50,082 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:34:22,310 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 14:34:22,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:22,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:22,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:22,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 14:34:22,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:34:22,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:34:22,791 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:22,791 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-04 14:34:22,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:22,952 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 14:34:22,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:34:22,954 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 14:34:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:22,955 INFO L225 Difference]: With dead ends: 31 [2018-10-04 14:34:22,955 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:34:22,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 12 [2018-10-04 14:34:22,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:34:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 14:34:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:34:22,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 14:34:22,960 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 14:34:22,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:22,961 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 14:34:22,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:34:22,961 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 14:34:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:34:22,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:22,962 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-04 14:34:22,962 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:22,962 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:22,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-04 14:34:22,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:22,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:22,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:22,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:22,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:23,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:23,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:23,320 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:34:32,223 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 14:34:32,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:32,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:32,388 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:32,388 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 14:34:32,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:34:32,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:34:32,389 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:32,389 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-04 14:34:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:32,562 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 14:34:32,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:34:32,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 14:34:32,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:32,564 INFO L225 Difference]: With dead ends: 33 [2018-10-04 14:34:32,564 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 14:34:32,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 13 [2018-10-04 14:34:32,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 14:34:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 14:34:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:34:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 14:34:32,570 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 14:34:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:32,570 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 14:34:32,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:34:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 14:34:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:34:32,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:32,571 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 14:34:32,572 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:32,572 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-04 14:34:32,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:32,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:32,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:32,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:32,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:33,919 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:33,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:33,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:33,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:33,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:34,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:34,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 14:34:34,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:34:34,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:34:34,215 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:34,215 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-04 14:34:34,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:34,424 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 14:34:34,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:34:34,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 14:34:34,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:34,425 INFO L225 Difference]: With dead ends: 35 [2018-10-04 14:34:34,426 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 14:34:34,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 14 [2018-10-04 14:34:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 14:34:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 14:34:34,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 14:34:34,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 14:34:34,433 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 14:34:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:34,434 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 14:34:34,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:34:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 14:34:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:34:34,435 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:34,435 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-04 14:34:34,436 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:34,436 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:34,436 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-04 14:34:34,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:34,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:34,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:34,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:34:34,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:34,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:34,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:34,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:34:34,798 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:34:34,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:34:34,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:34:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:35,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:34:35,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 14:34:35,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:34:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:34:35,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:34:35,426 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-04 14:34:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:34:35,764 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 14:34:35,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:34:35,765 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 14:34:35,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:34:35,766 INFO L225 Difference]: With dead ends: 37 [2018-10-04 14:34:35,766 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 14:34:35,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.1s impTime 15 [2018-10-04 14:34:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 14:34:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 14:34:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:34:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 14:34:35,772 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 14:34:35,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:34:35,773 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 14:34:35,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:34:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 14:34:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:34:35,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:34:35,774 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 14:34:35,774 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:34:35,775 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:34:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-04 14:34:35,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:34:35,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:34:35,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:35,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:34:35,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:34:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:34:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:34:36,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:34:36,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:34:36,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:35:22,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 14:35:22,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:24,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:24,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:24,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 14:35:24,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:35:24,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:35:24,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:24,325 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-04 14:35:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:24,558 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 14:35:24,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:35:24,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 14:35:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:24,560 INFO L225 Difference]: With dead ends: 39 [2018-10-04 14:35:24,560 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 14:35:24,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 16 [2018-10-04 14:35:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 14:35:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 14:35:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 14:35:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 14:35:24,566 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-04 14:35:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:24,566 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 14:35:24,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:35:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 14:35:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 14:35:24,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:24,567 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-04 14:35:24,567 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:24,567 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:24,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-04 14:35:24,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:24,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:24,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:24,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:24,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:24,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:24,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:24,881 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:35:24,921 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:35:24,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:35:24,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:35:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:25,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:35:25,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 14:35:25,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 14:35:25,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 14:35:25,325 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:35:25,325 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-04 14:35:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:35:25,620 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 14:35:25,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:35:25,622 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 14:35:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:35:25,623 INFO L225 Difference]: With dead ends: 41 [2018-10-04 14:35:25,623 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 14:35:25,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 17 [2018-10-04 14:35:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 14:35:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 14:35:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 14:35:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 14:35:25,630 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-04 14:35:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:35:25,630 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 14:35:25,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 14:35:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 14:35:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 14:35:25,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:35:25,632 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-04 14:35:25,632 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:35:25,632 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:35:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-04 14:35:25,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:35:25,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:35:25,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:25,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:35:25,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:35:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:35:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:35:25,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:35:25,989 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:35:25,996 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:27,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 14:37:27,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:27,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:27,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:37:27,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 14:37:27,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:37:27,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:37:27,685 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:27,685 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-04 14:37:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:27,977 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 14:37:27,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:37:27,978 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 14:37:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:27,978 INFO L225 Difference]: With dead ends: 43 [2018-10-04 14:37:27,978 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 14:37:27,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 18 [2018-10-04 14:37:27,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 14:37:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 14:37:27,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 14:37:27,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 14:37:27,985 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-04 14:37:27,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:27,985 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 14:37:27,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:37:27,986 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 14:37:27,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 14:37:27,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:27,986 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-04 14:37:27,987 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:37:27,987 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-04 14:37:27,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:27,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:27,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:27,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:27,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:37:28,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:37:28,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 14:37:28,456 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown