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/functions1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:28:01,864 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:28:01,866 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:28:01,876 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:28:01,877 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:28:01,878 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:28:01,879 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:28:01,881 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:28:01,882 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:28:01,883 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:28:01,884 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 14:28:01,919 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 14:28:01,947 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:28:01,947 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:28:01,949 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:28:01,949 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:28:01,950 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:28:01,953 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:28:01,953 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:28:01,954 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:28:01,954 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:28:01,954 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:28:01,954 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:28:01,955 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:28:01,955 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:28:01,955 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:28:01,955 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:28:01,955 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:28:01,955 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:28:01,956 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:28:01,956 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:28:01,956 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:28:01,956 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:28:01,956 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:28:01,957 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:28:01,957 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:28:01,957 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:28:01,957 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:28:01,957 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:28:01,958 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:28:01,958 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:28:01,958 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:28:01,958 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:28:02,015 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:28:02,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:28:02,039 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:28:02,041 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:28:02,041 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:28:02,042 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/functions1.i_3.bpl [2018-10-04 14:28:02,042 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/functions1.i_3.bpl' [2018-10-04 14:28:02,099 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:28:02,100 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:28:02,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:28:02,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:28:02,102 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:28:02,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:28:02" (1/1) ... [2018-10-04 14:28:02,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:28:02" (1/1) ... [2018-10-04 14:28:02,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:28:02,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:28:02,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:28:02,144 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:28:02,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:28:02" (1/1) ... [2018-10-04 14:28:02,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:28:02" (1/1) ... [2018-10-04 14:28:02,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:28:02" (1/1) ... [2018-10-04 14:28:02,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:28:02" (1/1) ... [2018-10-04 14:28:02,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:28:02" (1/1) ... [2018-10-04 14:28:02,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:28:02" (1/1) ... [2018-10-04 14:28:02,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:28:02" (1/1) ... [2018-10-04 14:28:02,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:28:02,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:28:02,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:28:02,176 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:28:02,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:28:02" (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 14:28:02,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 14:28:02,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 14:28:02,514 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 14:28:02,515 INFO L202 PluginConnector]: Adding new model functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:28:02 BoogieIcfgContainer [2018-10-04 14:28:02,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:28:02,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:28:02,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:28:02,520 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:28:02,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:28:02" (1/2) ... [2018-10-04 14:28:02,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@248d4d06 and model type functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:28:02, skipping insertion in model container [2018-10-04 14:28:02,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "functions1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:28:02" (2/2) ... [2018-10-04 14:28:02,528 INFO L112 eAbstractionObserver]: Analyzing ICFG functions1.i_3.bpl [2018-10-04 14:28:02,538 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:28:02,546 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:28:02,594 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:28:02,595 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:28:02,595 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:28:02,595 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:28:02,595 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:28:02,595 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:28:02,596 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:28:02,596 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:28:02,596 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:28:02,611 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 14:28:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 14:28:02,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:02,618 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 14:28:02,619 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:02,626 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:02,627 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 14:28:02,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:02,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:02,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:02,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:02,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:02,811 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 14:28:02,813 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:28:02,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 14:28:02,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:28:02,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:28:02,832 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:02,834 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 14:28:02,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:02,862 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 14:28:02,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:28:02,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 14:28:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:02,876 INFO L225 Difference]: With dead ends: 11 [2018-10-04 14:28:02,877 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 14:28:02,880 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 14:28:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 14:28:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 14:28:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 14:28:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 14:28:02,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 14:28:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:02,915 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 14:28:02,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:28:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 14:28:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:28:02,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:02,916 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 14:28:02,917 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:02,917 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:02,917 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 14:28:02,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:02,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:02,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:02,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:02,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:03,111 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 14:28:03,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:03,112 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 14:28:03,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:03,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:03,218 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 14:28:03,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:03,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 14:28:03,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 14:28:03,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 14:28:03,242 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:03,243 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-04 14:28:03,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:03,285 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 14:28:03,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 14:28:03,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 14:28:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:03,289 INFO L225 Difference]: With dead ends: 11 [2018-10-04 14:28:03,289 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 14:28:03,290 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 14:28:03,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 14:28:03,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 14:28:03,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:28:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 14:28:03,295 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 14:28:03,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:03,296 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 14:28:03,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 14:28:03,298 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 14:28:03,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:28:03,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:03,298 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 14:28:03,299 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:03,300 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:03,300 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-04 14:28:03,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:03,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:03,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:03,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:03,468 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 14:28:03,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:03,469 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 14:28:03,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:03,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:03,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:03,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:03,551 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 14:28:03,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:03,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 14:28:03,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:28:03,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:28:03,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:03,575 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-04 14:28:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:03,650 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 14:28:03,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:28:03,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 14:28:03,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:03,651 INFO L225 Difference]: With dead ends: 13 [2018-10-04 14:28:03,651 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:28:03,651 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 14:28:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:28:03,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 14:28:03,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:28:03,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 14:28:03,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 14:28:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:03,656 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 14:28:03,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:28:03,657 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 14:28:03,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:28:03,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:03,658 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 14:28:03,658 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:03,658 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:03,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-04 14:28:03,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:03,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:03,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:03,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:03,876 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 14:28:03,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:03,876 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 14:28:03,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:03,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 14:28:03,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:03,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:04,113 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 14:28:04,133 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:04,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 14:28:04,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:28:04,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:28:04,135 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:04,135 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-04 14:28:04,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:04,178 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 14:28:04,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:28:04,179 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 14:28:04,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:04,180 INFO L225 Difference]: With dead ends: 15 [2018-10-04 14:28:04,180 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:28:04,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 4 [2018-10-04 14:28:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:28:04,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 14:28:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 14:28:04,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 14:28:04,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 14:28:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:04,185 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 14:28:04,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:28:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 14:28:04,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 14:28:04,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:04,186 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 14:28:04,186 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:04,187 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:04,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-04 14:28:04,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:04,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:04,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:04,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:04,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:04,361 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 14:28:04,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:04,361 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 14:28:04,374 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:04,414 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:04,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:04,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:04,481 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 14:28:04,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:04,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 14:28:04,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 14:28:04,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 14:28:04,503 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:04,503 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-04 14:28:04,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:04,659 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 14:28:04,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:28:04,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 14:28:04,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:04,661 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:28:04,662 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 14:28:04,662 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 14:28:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 14:28:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 14:28:04,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 14:28:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 14:28:04,666 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 14:28:04,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:04,667 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 14:28:04,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 14:28:04,667 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 14:28:04,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:28:04,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:04,668 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 14:28:04,668 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:04,669 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:04,669 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-04 14:28:04,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:04,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:04,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:04,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:04,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:04,817 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 14:28:04,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:04,818 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 14:28:04,834 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:28:05,170 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 14:28:05,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:05,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:05,306 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 14:28:05,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:05,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 14:28:05,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:28:05,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:28:05,333 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:05,333 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-04 14:28:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:05,575 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 14:28:05,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:28:05,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 14:28:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:05,578 INFO L225 Difference]: With dead ends: 19 [2018-10-04 14:28:05,578 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 14:28:05,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 6 [2018-10-04 14:28:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 14:28:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 14:28:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 14:28:05,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 14:28:05,586 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 14:28:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:05,592 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 14:28:05,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:28:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 14:28:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:28:05,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:05,594 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 14:28:05,595 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:05,595 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:05,595 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-04 14:28:05,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:05,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:05,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:05,597 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:05,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:05,978 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 14:28:05,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:05,979 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 14:28:06,003 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:28:06,053 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 14:28:06,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:06,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:06,168 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 14:28:06,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:06,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 14:28:06,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:28:06,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:28:06,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:06,193 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-04 14:28:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:06,265 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 14:28:06,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:28:06,269 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 14:28:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:06,270 INFO L225 Difference]: With dead ends: 21 [2018-10-04 14:28:06,270 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:28:06,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 7 [2018-10-04 14:28:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:28:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 14:28:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:28:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 14:28:06,275 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 14:28:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:06,275 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 14:28:06,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:28:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 14:28:06,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:28:06,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:06,276 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 14:28:06,277 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:06,277 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:06,277 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-04 14:28:06,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:06,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:06,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:06,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:06,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:06,902 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 14:28:06,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:06,903 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 14:28:06,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:06,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:07,147 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 14:28:07,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:07,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 14:28:07,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:28:07,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:28:07,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:07,169 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-04 14:28:07,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:07,301 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 14:28:07,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:28:07,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 14:28:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:07,302 INFO L225 Difference]: With dead ends: 23 [2018-10-04 14:28:07,303 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 14:28:07,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 8 [2018-10-04 14:28:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 14:28:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 14:28:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:28:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 14:28:07,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 14:28:07,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:07,308 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 14:28:07,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:28:07,308 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 14:28:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:28:07,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:07,309 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 14:28:07,309 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:07,310 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:07,310 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-04 14:28:07,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:07,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:07,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:07,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:28:07,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:07,551 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 14:28:07,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:07,551 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 14:28:07,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:28:07,580 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:28:07,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:07,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:07,678 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 14:28:07,699 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:07,699 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 14:28:07,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:28:07,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:28:07,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:07,700 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-04 14:28:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:07,889 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 14:28:07,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:28:07,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 14:28:07,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:07,892 INFO L225 Difference]: With dead ends: 25 [2018-10-04 14:28:07,893 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:28:07,893 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 14:28:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:28:07,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 14:28:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 14:28:07,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 14:28:07,899 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 14:28:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:07,899 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 14:28:07,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:28:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 14:28:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 14:28:07,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:07,900 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 14:28:07,901 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:07,901 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:07,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-04 14:28:07,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:07,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:07,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:07,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:07,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:08,112 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 14:28:08,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:08,112 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 14:28:08,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:28:27,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 14:28:27,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:27,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:27,999 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 14:28:28,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:28,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 14:28:28,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:28:28,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:28:28,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:28,021 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-04 14:28:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:28,196 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 14:28:28,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:28:28,197 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-04 14:28:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:28,197 INFO L225 Difference]: With dead ends: 27 [2018-10-04 14:28:28,198 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 14:28:28,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 10 [2018-10-04 14:28:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 14:28:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 14:28:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:28:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 14:28:28,204 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 14:28:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:28,204 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 14:28:28,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:28:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 14:28:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:28:28,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:28,205 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-04 14:28:28,206 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:28,206 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:28,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-04 14:28:28,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:28,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:28,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:28,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:28,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:28,638 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 14:28:28,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:28,639 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 14:28:28,648 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:28:28,673 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:28:28,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:28:28,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:28:29,119 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 14:28:29,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:28:29,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 14:28:29,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 14:28:29,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 14:28:29,152 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:28:29,152 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-04 14:28:29,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:28:29,787 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 14:28:29,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:28:29,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-04 14:28:29,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:28:29,789 INFO L225 Difference]: With dead ends: 29 [2018-10-04 14:28:29,789 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:28:29,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.2s impTime 11 [2018-10-04 14:28:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:28:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 14:28:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 14:28:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 14:28:29,794 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 14:28:29,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:28:29,795 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 14:28:29,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 14:28:29,795 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 14:28:29,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:28:29,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:28:29,796 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 14:28:29,796 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:28:29,796 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:28:29,797 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-04 14:28:29,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:28:29,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:28:29,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:29,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:28:29,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:28:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:28:30,140 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 14:28:30,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:28:30,141 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 14:28:30,148 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:29:33,177 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 14:29:33,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:33,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:33,517 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 14:29:33,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:33,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 14:29:33,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:29:33,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:29:33,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:33,548 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-04 14:29:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:33,740 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 14:29:33,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:29:33,742 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-04 14:29:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:33,743 INFO L225 Difference]: With dead ends: 31 [2018-10-04 14:29:33,743 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:29:33,743 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 14:29:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:29:33,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 14:29:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:29:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 14:29:33,748 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 14:29:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:33,748 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 14:29:33,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:29:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 14:29:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:29:33,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:33,749 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-04 14:29:33,749 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:33,749 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-04 14:29:33,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:33,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:33,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:33,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:33,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:34,602 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 14:29:34,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:34,603 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 14:29:34,611 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:29:54,697 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 14:29:54,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:54,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:55,090 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 14:29:55,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:55,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 14:29:55,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:29:55,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:29:55,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:55,113 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-04 14:29:55,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:55,280 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 14:29:55,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:29:55,281 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-04 14:29:55,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:55,281 INFO L225 Difference]: With dead ends: 33 [2018-10-04 14:29:55,281 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 14:29:55,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.5s impTime 13 [2018-10-04 14:29:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 14:29:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 14:29:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:29:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 14:29:55,286 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 14:29:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:55,287 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 14:29:55,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:29:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 14:29:55,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:29:55,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:55,288 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 14:29:55,288 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:55,288 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:55,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-04 14:29:55,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:55,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:55,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:55,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:55,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:55,577 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 14:29:55,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:55,577 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 14:29:55,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:55,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:56,055 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 14:29:56,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:56,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 14:29:56,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:29:56,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:29:56,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:56,087 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-04 14:29:56,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:56,287 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 14:29:56,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:29:56,287 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-04 14:29:56,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:56,288 INFO L225 Difference]: With dead ends: 35 [2018-10-04 14:29:56,288 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 14:29:56,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime 14 [2018-10-04 14:29:56,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 14:29:56,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 14:29:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 14:29:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 14:29:56,295 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 14:29:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:56,295 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 14:29:56,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:29:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 14:29:56,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:29:56,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:56,297 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-04 14:29:56,297 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:56,297 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:56,297 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-04 14:29:56,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:56,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:56,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:56,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:29:56,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:56,605 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 14:29:56,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:56,605 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 14:29:56,615 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:29:56,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:29:56,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:29:56,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:29:56,780 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 14:29:56,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:29:56,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 14:29:56,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:29:56,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:29:56,801 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:29:56,801 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-04 14:29:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:29:57,072 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 14:29:57,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:29:57,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-04 14:29:57,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:29:57,074 INFO L225 Difference]: With dead ends: 37 [2018-10-04 14:29:57,074 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 14:29:57,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 15 [2018-10-04 14:29:57,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 14:29:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 14:29:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:29:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 14:29:57,079 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 14:29:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:29:57,079 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 14:29:57,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:29:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 14:29:57,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:29:57,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:29:57,080 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 14:29:57,080 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:29:57,080 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:29:57,081 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-04 14:29:57,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:29:57,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:29:57,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:57,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:29:57,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:29:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:29:57,475 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 14:29:57,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:29:57,476 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 14:29:57,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:30:29,875 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-04 14:30:29,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:29,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:30,029 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 14:30:30,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:30,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 14:30:30,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:30:30,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:30:30,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:30,035 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-04 14:30:30,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:30,278 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 14:30:30,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:30:30,279 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-04 14:30:30,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:30,279 INFO L225 Difference]: With dead ends: 39 [2018-10-04 14:30:30,279 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 14:30:30,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 16 [2018-10-04 14:30:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 14:30:30,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 14:30:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 14:30:30,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 14:30:30,285 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-04 14:30:30,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:30,285 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 14:30:30,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:30:30,285 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 14:30:30,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 14:30:30,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:30,286 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-04 14:30:30,286 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:30,287 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:30,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-04 14:30:30,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:30,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:30,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:30,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:30,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:31,114 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 14:30:31,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:31,114 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 14:30:31,122 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:30:31,160 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:30:31,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:31,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:31,313 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 14:30:31,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:31,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 14:30:31,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 14:30:31,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 14:30:31,334 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:31,334 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-04 14:30:31,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:31,609 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 14:30:31,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:30:31,617 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-04 14:30:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:31,618 INFO L225 Difference]: With dead ends: 41 [2018-10-04 14:30:31,618 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 14:30:31,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 17 [2018-10-04 14:30:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 14:30:31,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 14:30:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 14:30:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 14:30:31,624 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-04 14:30:31,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:31,624 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 14:30:31,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 14:30:31,624 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 14:30:31,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 14:30:31,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:31,625 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-04 14:30:31,626 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:31,626 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:31,626 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-04 14:30:31,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:31,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:31,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:31,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:31,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:32,838 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 14:30:32,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:32,838 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 14:30:32,846 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:32:06,335 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-04 14:32:06,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:32:06,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:32:06,900 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 14:32:06,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:32:06,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 14:32:06,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:32:06,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:32:06,924 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:32:06,924 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-04 14:32:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:32:07,190 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 14:32:07,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:32:07,192 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-04 14:32:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:32:07,193 INFO L225 Difference]: With dead ends: 43 [2018-10-04 14:32:07,193 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 14:32:07,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 18 [2018-10-04 14:32:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 14:32:07,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 14:32:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 14:32:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 14:32:07,199 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-04 14:32:07,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:32:07,200 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 14:32:07,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:32:07,200 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 14:32:07,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 14:32:07,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:32:07,201 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-04 14:32:07,201 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:32:07,202 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:32:07,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-04 14:32:07,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:32:07,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:32:07,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:07,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:32:07,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:32:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:32:07,610 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 14:32:07,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:32:07,610 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 14:32:07,618 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown