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/jain_5.i_2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:51:00,501 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:51:00,505 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:51:00,517 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:51:00,517 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:51:00,518 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:51:00,520 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:51:00,522 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:51:00,523 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:51:00,524 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:51:00,525 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:51:00,548 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 12:51:00,571 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:51:00,572 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:51:00,572 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:51:00,572 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:51:00,573 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:51:00,573 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:51:00,573 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:51:00,574 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:51:00,574 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:51:00,574 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:51:00,574 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:51:00,574 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:51:00,575 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:51:00,575 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:51:00,575 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:51:00,575 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:51:00,575 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:51:00,576 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:51:00,576 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:51:00,576 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:51:00,576 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:51:00,576 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:51:00,577 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:51:00,577 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:51:00,577 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:51:00,577 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:51:00,577 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:51:00,578 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:51:00,578 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:51:00,578 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:51:00,578 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:51:00,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:51:00,662 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:51:00,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:51:00,668 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:51:00,669 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:51:00,670 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl [2018-10-04 12:51:00,670 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/jain_5.i_2.bpl' [2018-10-04 12:51:00,723 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:51:00,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:51:00,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:51:00,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:51:00,726 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:51:00,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:00" (1/1) ... [2018-10-04 12:51:00,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:00" (1/1) ... [2018-10-04 12:51:00,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:51:00,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:51:00,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:51:00,761 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:51:00,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:00" (1/1) ... [2018-10-04 12:51:00,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:00" (1/1) ... [2018-10-04 12:51:00,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:00" (1/1) ... [2018-10-04 12:51:00,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:00" (1/1) ... [2018-10-04 12:51:00,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:00" (1/1) ... [2018-10-04 12:51:00,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:00" (1/1) ... [2018-10-04 12:51:00,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:00" (1/1) ... [2018-10-04 12:51:00,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:51:00,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:51:00,778 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:51:00,778 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:51:00,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:51:00,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:51:00,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:51:01,074 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:51:01,075 INFO L202 PluginConnector]: Adding new model jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:51:01 BoogieIcfgContainer [2018-10-04 12:51:01,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:51:01,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:51:01,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:51:01,081 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:51:01,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:00" (1/2) ... [2018-10-04 12:51:01,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b18ccb5 and model type jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:51:01, skipping insertion in model container [2018-10-04 12:51:01,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "jain_5.i_2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:51:01" (2/2) ... [2018-10-04 12:51:01,085 INFO L112 eAbstractionObserver]: Analyzing ICFG jain_5.i_2.bpl [2018-10-04 12:51:01,096 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:51:01,105 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:51:01,160 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:51:01,161 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:51:01,161 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:51:01,161 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:51:01,161 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:51:01,162 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:51:01,162 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:51:01,162 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:51:01,162 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:51:01,178 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 12:51:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:51:01,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:01,185 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:51:01,186 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:01,193 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash 925701, now seen corresponding path program 1 times [2018-10-04 12:51:01,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:01,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:01,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:01,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:01,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:01,555 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:51:01,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:51:01,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:51:01,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:51:01,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:01,578 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2018-10-04 12:51:01,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:01,666 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2018-10-04 12:51:01,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:51:01,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-04 12:51:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:01,680 INFO L225 Difference]: With dead ends: 12 [2018-10-04 12:51:01,680 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:51:01,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 2 [2018-10-04 12:51:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:51:01,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-10-04 12:51:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:51:01,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:51:01,721 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 12:51:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:01,722 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:51:01,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:51:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:51:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:51:01,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:01,723 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 12:51:01,724 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:01,724 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:01,725 INFO L82 PathProgramCache]: Analyzing trace with hash 889531649, now seen corresponding path program 1 times [2018-10-04 12:51:01,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:01,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:01,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:01,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:01,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:01,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:01,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:01,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:01,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:02,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:02,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-04 12:51:02,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:51:02,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:51:02,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:02,194 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 10 states. [2018-10-04 12:51:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:02,364 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 12:51:02,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:51:02,365 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 6 [2018-10-04 12:51:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:02,365 INFO L225 Difference]: With dead ends: 12 [2018-10-04 12:51:02,366 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:51:02,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 7 [2018-10-04 12:51:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:51:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-10-04 12:51:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:51:02,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:51:02,372 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 12:51:02,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:02,372 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:51:02,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:51:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:51:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:51:02,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:02,373 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 12:51:02,374 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:02,374 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash 141355773, now seen corresponding path program 2 times [2018-10-04 12:51:02,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:02,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:02,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:02,376 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:02,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:02,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:02,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:02,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:02,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:51:02,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:51:02,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:02,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:02,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:02,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:02,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-04 12:51:02,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:51:02,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:51:02,963 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:02,963 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 12 states. [2018-10-04 12:51:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:03,229 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 12:51:03,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:51:03,230 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2018-10-04 12:51:03,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:03,231 INFO L225 Difference]: With dead ends: 14 [2018-10-04 12:51:03,231 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 12:51:03,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 8 [2018-10-04 12:51:03,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 12:51:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-04 12:51:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:51:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:51:03,237 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 12:51:03,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:03,237 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:51:03,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:51:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:51:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:51:03,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:03,239 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 12:51:03,239 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:03,240 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:03,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1596122631, now seen corresponding path program 3 times [2018-10-04 12:51:03,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:03,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:03,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:03,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:03,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:03,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:03,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:03,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:51:03,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:51:03,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:03,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:03,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:03,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-04 12:51:03,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:51:03,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:51:03,604 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:03,605 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 14 states. [2018-10-04 12:51:04,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:04,100 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 12:51:04,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:51:04,104 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-10-04 12:51:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:04,104 INFO L225 Difference]: With dead ends: 16 [2018-10-04 12:51:04,104 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:51:04,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 11 [2018-10-04 12:51:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:51:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2018-10-04 12:51:04,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:51:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:51:04,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 12:51:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:04,110 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:51:04,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:51:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:51:04,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:51:04,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:04,111 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 12:51:04,111 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:04,111 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:04,112 INFO L82 PathProgramCache]: Analyzing trace with hash -570590731, now seen corresponding path program 4 times [2018-10-04 12:51:04,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:04,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:04,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:04,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:04,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:04,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:04,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:04,345 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:51:04,366 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:51:04,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:04,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:04,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:04,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-04 12:51:04,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:51:04,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:51:04,542 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:04,543 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 16 states. [2018-10-04 12:51:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:04,709 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 12:51:04,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:51:04,710 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-10-04 12:51:04,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:04,710 INFO L225 Difference]: With dead ends: 18 [2018-10-04 12:51:04,710 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:51:04,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 14 [2018-10-04 12:51:04,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:51:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-10-04 12:51:04,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:51:04,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:51:04,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 12:51:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:04,716 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:51:04,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:51:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:51:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:51:04,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:04,718 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 12:51:04,718 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:04,718 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:04,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1418054385, now seen corresponding path program 5 times [2018-10-04 12:51:04,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:04,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:04,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:04,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:04,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:04,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:04,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:04,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:51:19,668 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:51:19,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:19,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:19,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:19,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-04 12:51:19,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:51:19,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:51:19,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:19,972 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 18 states. [2018-10-04 12:51:20,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:20,372 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 12:51:20,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:51:20,373 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2018-10-04 12:51:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:20,374 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:51:20,374 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 12:51:20,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 17 [2018-10-04 12:51:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 12:51:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-04 12:51:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:51:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:51:20,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 12:51:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:20,381 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:51:20,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:51:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:51:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:51:20,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:20,382 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 12:51:20,382 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:20,383 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:20,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1245564141, now seen corresponding path program 6 times [2018-10-04 12:51:20,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:20,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:20,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:20,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:20,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:20,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:20,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:20,615 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:51:32,956 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:51:32,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:32,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:33,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:33,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-04 12:51:33,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:51:33,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:51:33,137 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:33,137 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 20 states. [2018-10-04 12:51:33,351 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 8 [2018-10-04 12:51:33,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:33,458 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 12:51:33,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:51:33,458 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 16 [2018-10-04 12:51:33,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:33,459 INFO L225 Difference]: With dead ends: 22 [2018-10-04 12:51:33,459 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:51:33,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 9 [2018-10-04 12:51:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:51:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-10-04 12:51:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:51:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:51:33,466 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 12:51:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:33,466 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:51:33,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:51:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:51:33,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:51:33,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:33,467 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 12:51:33,468 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:33,468 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:33,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1308803095, now seen corresponding path program 7 times [2018-10-04 12:51:33,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:33,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:33,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:33,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:33,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:33,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:33,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:33,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:33,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:33,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:33,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-04 12:51:33,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:51:33,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:51:33,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:33,903 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 22 states. [2018-10-04 12:51:34,317 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 9 [2018-10-04 12:51:34,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:34,672 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 12:51:34,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:51:34,673 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 18 [2018-10-04 12:51:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:34,673 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:51:34,673 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:51:34,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 13 [2018-10-04 12:51:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:51:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2018-10-04 12:51:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:51:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:51:34,681 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 12:51:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:34,682 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:51:34,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:51:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:51:34,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:51:34,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:34,683 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 12:51:34,683 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:34,683 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:34,683 INFO L82 PathProgramCache]: Analyzing trace with hash 665576421, now seen corresponding path program 8 times [2018-10-04 12:51:34,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:34,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:34,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:34,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:34,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:34,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:35,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:35,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:35,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:51:35,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:51:35,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:35,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:35,368 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 10 [2018-10-04 12:51:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:35,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:35,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2018-10-04 12:51:35,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:51:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:51:35,412 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:35,412 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 24 states. [2018-10-04 12:51:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:36,244 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 12:51:36,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:51:36,244 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 20 [2018-10-04 12:51:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:36,245 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:51:36,245 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:51:36,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 17 [2018-10-04 12:51:36,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:51:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-04 12:51:36,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:51:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:51:36,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 12:51:36,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:36,253 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:51:36,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:51:36,253 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:51:36,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:51:36,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:36,254 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 12:51:36,254 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:36,254 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash -331253535, now seen corresponding path program 9 times [2018-10-04 12:51:36,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:36,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:36,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:36,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:36,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:36,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:36,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:36,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:51:41,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-04 12:51:41,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:41,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:41,735 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 10 [2018-10-04 12:51:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:41,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:41,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-04 12:51:41,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:51:41,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:51:41,806 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:41,806 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 26 states. [2018-10-04 12:51:42,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:42,260 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 12:51:42,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:51:42,261 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 22 [2018-10-04 12:51:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:42,262 INFO L225 Difference]: With dead ends: 28 [2018-10-04 12:51:42,262 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:51:42,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 20 [2018-10-04 12:51:42,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:51:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-04 12:51:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:51:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:51:42,270 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-04 12:51:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:42,271 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:51:42,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:51:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:51:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:51:42,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:42,271 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-04 12:51:42,272 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:42,272 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:42,272 INFO L82 PathProgramCache]: Analyzing trace with hash -507134243, now seen corresponding path program 10 times [2018-10-04 12:51:42,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:42,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:42,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:42,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:42,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:42,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:42,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:42,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:42,690 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:51:42,718 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:51:42,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:42,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:43,115 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 11 [2018-10-04 12:51:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:43,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:43,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2018-10-04 12:51:43,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:51:43,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:51:43,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:43,226 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 28 states. [2018-10-04 12:51:43,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:43,893 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 12:51:43,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:51:43,893 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 24 [2018-10-04 12:51:43,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:43,894 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:51:43,894 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:51:43,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 24 [2018-10-04 12:51:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:51:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-10-04 12:51:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:51:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:51:43,902 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-04 12:51:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:43,903 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:51:43,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:51:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:51:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:51:43,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:43,904 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-04 12:51:43,904 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:43,904 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:43,904 INFO L82 PathProgramCache]: Analyzing trace with hash -2024770087, now seen corresponding path program 11 times [2018-10-04 12:51:43,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:43,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:43,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:43,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:43,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:44,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:44,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:44,207 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:53:20,018 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:53:20,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:20,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:20,498 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 13 [2018-10-04 12:53:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:20,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:20,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-04 12:53:20,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:53:20,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:53:20,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:20,741 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 30 states. [2018-10-04 12:53:21,451 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 13 [2018-10-04 12:53:21,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:21,545 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 12:53:21,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:53:21,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 26 [2018-10-04 12:53:21,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:21,547 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:53:21,547 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 12:53:21,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 14 [2018-10-04 12:53:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 12:53:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-04 12:53:21,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:53:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:53:21,555 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-04 12:53:21,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:21,556 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:53:21,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:53:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:53:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:53:21,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:21,557 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-04 12:53:21,557 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:21,557 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:21,557 INFO L82 PathProgramCache]: Analyzing trace with hash -183935531, now seen corresponding path program 12 times [2018-10-04 12:53:21,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:21,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:21,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:21,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:21,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:21,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:21,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:21,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:25,596 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:54:25,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:25,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:26,054 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 13 [2018-10-04 12:54:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:26,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:26,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 31 [2018-10-04 12:54:26,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:54:26,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:54:26,251 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:26,251 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 32 states. [2018-10-04 12:54:26,986 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 14 [2018-10-04 12:54:27,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:27,190 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 12:54:27,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:54:27,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 28 [2018-10-04 12:54:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:27,197 INFO L225 Difference]: With dead ends: 34 [2018-10-04 12:54:27,197 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:54:27,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 17 [2018-10-04 12:54:27,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:54:27,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2018-10-04 12:54:27,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:54:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:54:27,207 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-04 12:54:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:27,208 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:54:27,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:54:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:54:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:54:27,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:27,209 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-04 12:54:27,209 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:27,209 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash -668453167, now seen corresponding path program 13 times [2018-10-04 12:54:27,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:27,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:27,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:27,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:27,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:28,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:28,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:28,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:28,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:28,334 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 14 [2018-10-04 12:54:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:28,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:28,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-04 12:54:28,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:54:28,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:54:28,547 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:28,547 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 34 states. [2018-10-04 12:54:29,209 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 30 new depth: 15 [2018-10-04 12:54:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:29,580 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 12:54:29,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:54:29,580 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 30 [2018-10-04 12:54:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:29,581 INFO L225 Difference]: With dead ends: 36 [2018-10-04 12:54:29,581 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:54:29,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 21 [2018-10-04 12:54:29,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:54:29,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-04 12:54:29,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:54:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:54:29,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-04 12:54:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:29,593 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:54:29,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:54:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:54:29,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:54:29,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:29,594 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-04 12:54:29,594 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:29,594 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:29,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1861533901, now seen corresponding path program 14 times [2018-10-04 12:54:29,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:29,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:29,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:29,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:29,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:30,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:30,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:30,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:30,087 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:30,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:30,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:30,255 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 15 [2018-10-04 12:54:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:30,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:30,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2018-10-04 12:54:30,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:54:30,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:54:30,547 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:30,547 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 36 states. [2018-10-04 12:54:30,793 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 31 new depth: 16 [2018-10-04 12:54:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:31,503 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 12:54:31,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:54:31,503 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 32 [2018-10-04 12:54:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:31,504 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:54:31,505 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:54:31,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 26 [2018-10-04 12:54:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:54:31,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-04 12:54:31,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:54:31,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:54:31,516 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-04 12:54:31,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:31,516 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:54:31,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:54:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:54:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:54:31,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:31,517 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-04 12:54:31,517 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:31,517 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:31,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2067350583, now seen corresponding path program 15 times [2018-10-04 12:54:31,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:31,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:31,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:31,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:31,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:32,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:32,639 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:32,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown