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/nested1.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 12:13:56,925 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:13:56,927 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:13:56,939 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 12:13:56,939 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 12:13:56,940 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 12:13:56,942 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 12:13:56,943 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 12:13:56,945 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 12:13:56,946 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 12:13:56,947 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 12:13:56,972 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 [2018-10-02 12:13:56,988 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:13:56,988 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:13:56,989 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:13:56,990 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:13:56,990 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:13:56,991 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:13:56,992 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:13:56,992 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:13:56,992 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:13:56,992 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:13:56,992 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:13:56,993 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:13:56,993 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:13:56,993 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:13:56,993 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:13:56,994 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:13:56,994 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:13:56,994 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:13:56,995 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:13:56,995 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:13:56,995 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:13:56,995 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:13:56,997 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:13:56,997 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:13:56,997 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:13:56,997 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:13:56,997 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:13:56,998 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:13:56,998 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:13:56,998 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:13:56,998 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:13:57,061 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:13:57,079 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:13:57,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:13:57,086 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:13:57,087 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:13:57,088 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl [2018-10-02 12:13:57,088 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl' [2018-10-02 12:13:57,146 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:13:57,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:13:57,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:13:57,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:13:57,152 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:13:57,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:57" (1/1) ... [2018-10-02 12:13:57,186 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:57" (1/1) ... [2018-10-02 12:13:57,193 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:13:57,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:13:57,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:13:57,194 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:13:57,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:57" (1/1) ... [2018-10-02 12:13:57,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:57" (1/1) ... [2018-10-02 12:13:57,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:57" (1/1) ... [2018-10-02 12:13:57,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:57" (1/1) ... [2018-10-02 12:13:57,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:57" (1/1) ... [2018-10-02 12:13:57,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:57" (1/1) ... [2018-10-02 12:13:57,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:57" (1/1) ... [2018-10-02 12:13:57,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:13:57,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:13:57,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:13:57,217 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:13:57,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:57" (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 [2018-10-02 12:13:57,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 12:13:57,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 12:13:57,524 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 12:13:57,525 INFO L202 PluginConnector]: Adding new model nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:13:57 BoogieIcfgContainer [2018-10-02 12:13:57,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:13:57,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:13:57,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:13:57,533 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:13:57,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:13:57" (1/2) ... [2018-10-02 12:13:57,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4803caf and model type nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:13:57, skipping insertion in model container [2018-10-02 12:13:57,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:13:57" (2/2) ... [2018-10-02 12:13:57,538 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bpl [2018-10-02 12:13:57,549 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:13:57,558 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:13:57,618 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:13:57,619 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:13:57,619 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:13:57,619 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:13:57,620 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:13:57,620 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:13:57,620 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:13:57,620 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:13:57,623 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:13:57,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 12:13:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 12:13:57,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:57,659 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 12:13:57,661 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:57,668 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:57,668 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-02 12:13:57,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:57,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:57,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:57,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:13:57,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:57,854 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:13:57,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 12:13:57,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 12:13:57,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 12:13:57,875 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:57,878 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-02 12:13:58,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:58,079 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-02 12:13:58,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 12:13:58,081 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-02 12:13:58,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:58,100 INFO L225 Difference]: With dead ends: 17 [2018-10-02 12:13:58,100 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 12:13:58,103 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 [2018-10-02 12:13:58,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 12:13:58,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-10-02 12:13:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 12:13:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-02 12:13:58,135 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-10-02 12:13:58,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:58,135 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-02 12:13:58,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 12:13:58,135 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-02 12:13:58,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 12:13:58,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:58,136 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-02 12:13:58,137 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:58,137 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:58,137 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-10-02 12:13:58,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:58,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:58,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:58,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:13:58,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:58,184 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:13:58,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 12:13:58,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 12:13:58,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 12:13:58,187 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:58,187 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-10-02 12:13:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:58,277 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-10-02 12:13:58,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 12:13:58,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-10-02 12:13:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:58,278 INFO L225 Difference]: With dead ends: 17 [2018-10-02 12:13:58,278 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 12:13:58,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:13:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 12:13:58,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 12:13:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 12:13:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-02 12:13:58,284 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-02 12:13:58,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:58,284 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-02 12:13:58,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 12:13:58,284 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-02 12:13:58,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 12:13:58,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:58,285 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-02 12:13:58,285 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:58,286 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:58,286 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-10-02 12:13:58,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:58,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:58,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:58,287 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:13:58,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:58,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:58,380 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 [2018-10-02 12:13:58,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:13:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:58,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:13:58,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:58,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-02 12:13:58,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 12:13:58,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 12:13:58,562 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:58,562 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-10-02 12:13:59,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:13:59,356 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-10-02 12:13:59,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:13:59,357 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-02 12:13:59,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:13:59,358 INFO L225 Difference]: With dead ends: 35 [2018-10-02 12:13:59,358 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 12:13:59,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:13:59,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 12:13:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-10-02 12:13:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 12:13:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-02 12:13:59,367 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2018-10-02 12:13:59,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:13:59,368 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-02 12:13:59,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 12:13:59,368 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-02 12:13:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 12:13:59,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:13:59,369 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1] [2018-10-02 12:13:59,370 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:13:59,370 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:13:59,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1881088987, now seen corresponding path program 2 times [2018-10-02 12:13:59,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:13:59,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:13:59,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:59,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:13:59,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:13:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:13:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-02 12:13:59,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:13:59,473 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 [2018-10-02 12:13:59,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:13:59,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:13:59,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:13:59,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:13:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-02 12:13:59,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:13:59,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-02 12:13:59,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:13:59,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:13:59,875 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:13:59,875 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2018-10-02 12:14:00,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:00,874 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-10-02 12:14:00,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 12:14:00,875 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-10-02 12:14:00,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:00,877 INFO L225 Difference]: With dead ends: 55 [2018-10-02 12:14:00,877 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 12:14:00,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime [2018-10-02 12:14:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 12:14:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2018-10-02 12:14:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 12:14:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-10-02 12:14:00,889 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2018-10-02 12:14:00,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:00,890 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-10-02 12:14:00,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:14:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-10-02 12:14:00,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 12:14:00,891 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:00,891 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 1, 1, 1] [2018-10-02 12:14:00,892 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:00,892 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:00,892 INFO L82 PathProgramCache]: Analyzing trace with hash 501354739, now seen corresponding path program 3 times [2018-10-02 12:14:00,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:00,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:00,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:00,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:00,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-02 12:14:01,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:01,018 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 [2018-10-02 12:14:01,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:14:01,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-02 12:14:01,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:01,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-02 12:14:01,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:01,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 12:14:01,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 12:14:01,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 12:14:01,128 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:01,128 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2018-10-02 12:14:01,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:01,318 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2018-10-02 12:14:01,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:14:01,321 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-10-02 12:14:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:01,323 INFO L225 Difference]: With dead ends: 65 [2018-10-02 12:14:01,323 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 12:14:01,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:14:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 12:14:01,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 12:14:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 12:14:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-02 12:14:01,334 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-10-02 12:14:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:01,335 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-02 12:14:01,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 12:14:01,335 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-02 12:14:01,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 12:14:01,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:01,336 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-10-02 12:14:01,337 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:01,337 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:01,337 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-10-02 12:14:01,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:01,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:01,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:01,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:01,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-02 12:14:01,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:01,554 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 [2018-10-02 12:14:01,567 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:14:01,586 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:14:01,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:01,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-02 12:14:01,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:01,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 9 [2018-10-02 12:14:01,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:14:01,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:14:01,841 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:01,841 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2018-10-02 12:14:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:02,562 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-10-02 12:14:02,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:14:02,567 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-10-02 12:14:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:02,568 INFO L225 Difference]: With dead ends: 65 [2018-10-02 12:14:02,568 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 12:14:02,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime [2018-10-02 12:14:02,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 12:14:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2018-10-02 12:14:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 12:14:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-10-02 12:14:02,585 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40 [2018-10-02 12:14:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:02,586 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-10-02 12:14:02,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:14:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-10-02 12:14:02,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 12:14:02,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:02,588 INFO L375 BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 1, 1, 1] [2018-10-02 12:14:02,588 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:02,588 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:02,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1874565441, now seen corresponding path program 5 times [2018-10-02 12:14:02,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:02,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:02,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:02,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:02,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-02 12:14:02,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:02,858 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 [2018-10-02 12:14:02,866 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:14:02,883 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-02 12:14:02,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:02,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 262 proven. 20 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-10-02 12:14:03,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:03,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-10-02 12:14:03,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 12:14:03,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 12:14:03,023 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:03,023 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states. [2018-10-02 12:14:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:05,484 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2018-10-02 12:14:05,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 12:14:05,484 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-02 12:14:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:05,485 INFO L225 Difference]: With dead ends: 127 [2018-10-02 12:14:05,485 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 12:14:05,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime [2018-10-02 12:14:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 12:14:05,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2018-10-02 12:14:05,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 12:14:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-10-02 12:14:05,505 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 52 [2018-10-02 12:14:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:05,505 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-10-02 12:14:05,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 12:14:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-10-02 12:14:05,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 12:14:05,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:05,508 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 1, 1, 1] [2018-10-02 12:14:05,508 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:05,508 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:05,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1734028097, now seen corresponding path program 6 times [2018-10-02 12:14:05,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:05,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:05,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:05,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:05,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-10-02 12:14:05,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:05,899 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 [2018-10-02 12:14:05,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:14:06,045 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-02 12:14:06,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:06,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 520 proven. 30 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-02 12:14:06,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:06,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-02 12:14:06,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:14:06,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:14:06,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:06,197 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 14 states. [2018-10-02 12:14:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:09,504 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-10-02 12:14:09,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 12:14:09,505 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-10-02 12:14:09,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:09,506 INFO L225 Difference]: With dead ends: 175 [2018-10-02 12:14:09,506 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 12:14:09,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime [2018-10-02 12:14:09,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 12:14:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2018-10-02 12:14:09,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 12:14:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2018-10-02 12:14:09,525 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 74 [2018-10-02 12:14:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:09,526 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2018-10-02 12:14:09,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:14:09,526 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2018-10-02 12:14:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 12:14:09,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:09,528 INFO L375 BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 1, 1, 1] [2018-10-02 12:14:09,528 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:09,528 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:09,528 INFO L82 PathProgramCache]: Analyzing trace with hash 883432563, now seen corresponding path program 7 times [2018-10-02 12:14:09,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:09,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:09,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:09,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:09,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:09,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-10-02 12:14:09,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:09,717 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 [2018-10-02 12:14:09,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:14:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:09,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1554 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-02 12:14:10,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:10,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 14 [2018-10-02 12:14:10,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 12:14:10,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 12:14:10,397 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:10,398 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 15 states. [2018-10-02 12:14:11,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:11,624 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2018-10-02 12:14:11,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:14:11,625 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2018-10-02 12:14:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:11,626 INFO L225 Difference]: With dead ends: 133 [2018-10-02 12:14:11,626 INFO L226 Difference]: Without dead ends: 131 [2018-10-02 12:14:11,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime [2018-10-02 12:14:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-02 12:14:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2018-10-02 12:14:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-02 12:14:11,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2018-10-02 12:14:11,650 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 100 [2018-10-02 12:14:11,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:11,651 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2018-10-02 12:14:11,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 12:14:11,651 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2018-10-02 12:14:11,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 12:14:11,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:11,653 INFO L375 BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 1, 1, 1] [2018-10-02 12:14:11,654 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:11,654 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:11,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1346298395, now seen corresponding path program 8 times [2018-10-02 12:14:11,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:11,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:11,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:11,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:14:11,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-02 12:14:12,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:12,073 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 [2018-10-02 12:14:12,085 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:14:12,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:14:12,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:12,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-02 12:14:12,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:12,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 12:14:12,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:14:12,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:14:12,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:12,391 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 10 states. [2018-10-02 12:14:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:12,936 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2018-10-02 12:14:12,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:14:12,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 116 [2018-10-02 12:14:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:12,938 INFO L225 Difference]: With dead ends: 149 [2018-10-02 12:14:12,938 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 12:14:12,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime [2018-10-02 12:14:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 12:14:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2018-10-02 12:14:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-02 12:14:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2018-10-02 12:14:12,965 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 116 [2018-10-02 12:14:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:12,965 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2018-10-02 12:14:12,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:14:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2018-10-02 12:14:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-02 12:14:12,968 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:12,968 INFO L375 BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 1, 1, 1] [2018-10-02 12:14:12,968 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:12,968 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:12,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1851587415, now seen corresponding path program 9 times [2018-10-02 12:14:12,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:12,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:12,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:12,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:12,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:13,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 0 proven. 2816 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-10-02 12:14:13,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:13,205 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 [2018-10-02 12:14:13,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:14:13,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-02 12:14:13,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:13,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 702 proven. 42 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2018-10-02 12:14:13,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:13,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-10-02 12:14:13,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 12:14:13,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 12:14:13,475 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:13,475 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 18 states. [2018-10-02 12:14:21,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:21,236 INFO L93 Difference]: Finished difference Result 299 states and 327 transitions. [2018-10-02 12:14:21,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 12:14:21,237 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 132 [2018-10-02 12:14:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:21,238 INFO L225 Difference]: With dead ends: 299 [2018-10-02 12:14:21,238 INFO L226 Difference]: Without dead ends: 183 [2018-10-02 12:14:21,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime [2018-10-02 12:14:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-02 12:14:21,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2018-10-02 12:14:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-02 12:14:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2018-10-02 12:14:21,265 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 132 [2018-10-02 12:14:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:21,266 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2018-10-02 12:14:21,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 12:14:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2018-10-02 12:14:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-02 12:14:21,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:21,269 INFO L375 BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 1, 1, 1] [2018-10-02 12:14:21,269 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:21,269 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:21,269 INFO L82 PathProgramCache]: Analyzing trace with hash -132347917, now seen corresponding path program 10 times [2018-10-02 12:14:21,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:21,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:21,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:21,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:21,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4698 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2018-10-02 12:14:21,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:21,571 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 [2018-10-02 12:14:21,579 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:14:21,637 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:14:21,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:21,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 1952 proven. 56 refuted. 0 times theorem prover too weak. 3194 trivial. 0 not checked. [2018-10-02 12:14:21,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:21,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-10-02 12:14:21,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:14:21,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:14:21,930 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:21,930 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 20 states. [2018-10-02 12:14:30,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:30,445 INFO L93 Difference]: Finished difference Result 371 states and 402 transitions. [2018-10-02 12:14:30,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-02 12:14:30,451 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2018-10-02 12:14:30,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:30,452 INFO L225 Difference]: With dead ends: 371 [2018-10-02 12:14:30,452 INFO L226 Difference]: Without dead ends: 223 [2018-10-02 12:14:30,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime [2018-10-02 12:14:30,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-02 12:14:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 205. [2018-10-02 12:14:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-02 12:14:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2018-10-02 12:14:30,484 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 166 [2018-10-02 12:14:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:30,484 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2018-10-02 12:14:30,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:14:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2018-10-02 12:14:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-02 12:14:30,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:30,487 INFO L375 BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 1, 1, 1] [2018-10-02 12:14:30,488 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:30,488 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:30,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1568317117, now seen corresponding path program 11 times [2018-10-02 12:14:30,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:30,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:30,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:30,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:30,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 0 proven. 7400 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-10-02 12:14:30,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:30,859 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 [2018-10-02 12:14:30,868 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:14:31,085 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-02 12:14:31,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:31,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 3774 proven. 72 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked. [2018-10-02 12:14:31,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:31,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-10-02 12:14:31,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 12:14:31,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 12:14:31,363 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:31,363 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand 22 states. [2018-10-02 12:14:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:14:42,053 INFO L93 Difference]: Finished difference Result 451 states and 485 transitions. [2018-10-02 12:14:42,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-02 12:14:42,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 204 [2018-10-02 12:14:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:14:42,055 INFO L225 Difference]: With dead ends: 451 [2018-10-02 12:14:42,055 INFO L226 Difference]: Without dead ends: 267 [2018-10-02 12:14:42,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.7s impTime [2018-10-02 12:14:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-02 12:14:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2018-10-02 12:14:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-02 12:14:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2018-10-02 12:14:42,088 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 204 [2018-10-02 12:14:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:14:42,089 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2018-10-02 12:14:42,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 12:14:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2018-10-02 12:14:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-02 12:14:42,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:14:42,092 INFO L375 BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 1, 1, 1] [2018-10-02 12:14:42,093 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:14:42,093 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:14:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash 915329223, now seen corresponding path program 12 times [2018-10-02 12:14:42,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:14:42,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:14:42,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:42,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:14:42,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:14:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:14:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 0 proven. 11132 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-02 12:14:42,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:14:42,507 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 [2018-10-02 12:14:42,527 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:14:47,394 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-02 12:14:47,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:14:47,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:14:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 2022 proven. 90 refuted. 0 times theorem prover too weak. 10010 trivial. 0 not checked. [2018-10-02 12:14:47,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:14:47,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-10-02 12:14:47,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 12:14:47,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 12:14:47,866 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:14:47,866 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand 24 states. [2018-10-02 12:15:02,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:15:02,502 INFO L93 Difference]: Finished difference Result 539 states and 576 transitions. [2018-10-02 12:15:02,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-02 12:15:02,502 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2018-10-02 12:15:02,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:15:02,504 INFO L225 Difference]: With dead ends: 539 [2018-10-02 12:15:02,504 INFO L226 Difference]: Without dead ends: 315 [2018-10-02 12:15:02,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.7s impTime [2018-10-02 12:15:02,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-02 12:15:02,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 293. [2018-10-02 12:15:02,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-02 12:15:02,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions. [2018-10-02 12:15:02,548 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 246 [2018-10-02 12:15:02,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:15:02,548 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 305 transitions. [2018-10-02 12:15:02,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 12:15:02,549 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions. [2018-10-02 12:15:02,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-02 12:15:02,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:15:02,552 INFO L375 BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 1, 1, 1] [2018-10-02 12:15:02,552 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:15:02,553 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:15:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash 154612223, now seen corresponding path program 13 times [2018-10-02 12:15:02,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:15:02,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:15:02,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:02,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:15:02,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:15:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-02 12:15:03,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:15:03,331 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 [2018-10-02 12:15:03,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:15:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:15:03,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:15:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-02 12:15:04,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:15:04,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 12:15:04,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 12:15:04,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 12:15:04,097 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:15:04,097 INFO L87 Difference]: Start difference. First operand 293 states and 305 transitions. Second operand 15 states. [2018-10-02 12:15:05,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:15:05,436 INFO L93 Difference]: Finished difference Result 341 states and 355 transitions. [2018-10-02 12:15:05,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:15:05,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 292 [2018-10-02 12:15:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:15:05,438 INFO L225 Difference]: With dead ends: 341 [2018-10-02 12:15:05,438 INFO L226 Difference]: Without dead ends: 339 [2018-10-02 12:15:05,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.3s impTime [2018-10-02 12:15:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-02 12:15:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317. [2018-10-02 12:15:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-10-02 12:15:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 330 transitions. [2018-10-02 12:15:05,488 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 330 transitions. Word has length 292 [2018-10-02 12:15:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:15:05,488 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 330 transitions. [2018-10-02 12:15:05,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 12:15:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 330 transitions. [2018-10-02 12:15:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-02 12:15:05,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:15:05,491 INFO L375 BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 1, 1, 1] [2018-10-02 12:15:05,491 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:15:05,491 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:15:05,491 INFO L82 PathProgramCache]: Analyzing trace with hash -114885159, now seen corresponding path program 14 times [2018-10-02 12:15:05,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:15:05,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:15:05,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:05,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:15:05,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:15:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-02 12:15:06,526 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:15:06,527 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 [2018-10-02 12:15:06,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:15:06,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:15:06,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:15:06,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:15:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-02 12:15:07,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 12:15:07,364 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 12:15:07,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 12:15:07,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 12:15:07,365 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:15:07,365 INFO L87 Difference]: Start difference. First operand 317 states and 330 transitions. Second operand 16 states. [2018-10-02 12:15:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:15:09,047 INFO L93 Difference]: Finished difference Result 365 states and 380 transitions. [2018-10-02 12:15:09,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:15:09,047 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 316 [2018-10-02 12:15:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:15:09,050 INFO L225 Difference]: With dead ends: 365 [2018-10-02 12:15:09,050 INFO L226 Difference]: Without dead ends: 363 [2018-10-02 12:15:09,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.5s impTime [2018-10-02 12:15:09,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-02 12:15:09,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2018-10-02 12:15:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-10-02 12:15:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 355 transitions. [2018-10-02 12:15:09,103 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 355 transitions. Word has length 316 [2018-10-02 12:15:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:15:09,104 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 355 transitions. [2018-10-02 12:15:09,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 12:15:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 355 transitions. [2018-10-02 12:15:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-02 12:15:09,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:15:09,106 INFO L375 BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 1, 1, 1] [2018-10-02 12:15:09,106 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:15:09,106 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:15:09,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1438164045, now seen corresponding path program 15 times [2018-10-02 12:15:09,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:15:09,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:15:09,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:09,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:15:09,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:15:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:15:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 23772 backedges. 0 proven. 22232 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-02 12:15:09,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 12:15:09,879 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 [2018-10-02 12:15:09,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown