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/seq.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:53:25,358 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:53:25,360 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:53:25,372 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-04 12:53:25,404 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 12:53:25,419 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:53:25,420 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:53:25,421 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:53:25,421 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:53:25,421 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:53:25,422 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:53:25,422 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:53:25,422 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:53:25,422 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:53:25,422 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:53:25,423 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:53:25,423 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:53:25,423 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:53:25,423 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:53:25,423 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:53:25,424 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:53:25,424 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:53:25,424 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:53:25,424 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:53:25,424 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:53:25,425 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:53:25,425 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:53:25,425 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:53:25,425 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:53:25,425 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:53:25,426 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:53:25,426 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:53:25,426 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:53:25,426 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:53:25,426 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:53:25,427 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:53:25,470 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:53:25,482 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:53:25,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:53:25,488 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:53:25,489 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:53:25,489 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl [2018-10-04 12:53:25,490 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl' [2018-10-04 12:53:25,545 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:53:25,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:53:25,548 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:53:25,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:53:25,548 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:53:25,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:25" (1/1) ... [2018-10-04 12:53:25,581 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:25" (1/1) ... [2018-10-04 12:53:25,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:53:25,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:53:25,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:53:25,590 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:53:25,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:25" (1/1) ... [2018-10-04 12:53:25,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:25" (1/1) ... [2018-10-04 12:53:25,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:25" (1/1) ... [2018-10-04 12:53:25,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:25" (1/1) ... [2018-10-04 12:53:25,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:25" (1/1) ... [2018-10-04 12:53:25,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:25" (1/1) ... [2018-10-04 12:53:25,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:25" (1/1) ... [2018-10-04 12:53:25,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:53:25,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:53:25,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:53:25,609 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:53:25,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:25" (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 12:53:25,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:53:25,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:53:25,987 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:53:25,988 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:53:25 BoogieIcfgContainer [2018-10-04 12:53:25,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:53:25,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:53:25,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:53:25,994 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:53:25,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:25" (1/2) ... [2018-10-04 12:53:25,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52456914 and model type seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:53:25, skipping insertion in model container [2018-10-04 12:53:25,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:53:25" (2/2) ... [2018-10-04 12:53:25,999 INFO L112 eAbstractionObserver]: Analyzing ICFG seq.i_4.bpl [2018-10-04 12:53:26,012 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:53:26,021 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:53:26,080 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:53:26,082 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:53:26,082 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:53:26,083 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:53:26,083 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:53:26,083 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:53:26,083 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:53:26,083 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:53:26,086 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:53:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-04 12:53:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:53:26,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:26,119 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 12:53:26,121 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:26,129 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:26,131 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-10-04 12:53:26,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:26,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:26,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:26,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:26,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:26,468 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 12:53:26,472 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:53:26,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:53:26,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:53:26,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:53:26,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:26,496 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-04 12:53:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:26,632 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-10-04 12:53:26,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:53:26,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:53:26,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:26,646 INFO L225 Difference]: With dead ends: 16 [2018-10-04 12:53:26,646 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:53:26,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 3 [2018-10-04 12:53:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:53:26,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:53:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:53:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 12:53:26,688 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-04 12:53:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:26,689 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 12:53:26,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:53:26,689 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 12:53:26,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:53:26,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:26,690 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:53:26,690 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:26,691 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash 198621957, now seen corresponding path program 1 times [2018-10-04 12:53:26,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:26,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:26,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:26,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:26,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:26,942 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:53:26,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 12:53:26,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:53:26,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:53:26,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:26,945 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-04 12:53:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:27,091 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-04 12:53:27,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:53:27,091 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:53:27,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:27,092 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:53:27,092 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:53:27,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 4 [2018-10-04 12:53:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:53:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-10-04 12:53:27,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:53:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 12:53:27,098 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 12:53:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:27,098 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 12:53:27,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:53:27,099 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 12:53:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:53:27,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:27,099 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:53:27,100 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:27,100 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:27,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-10-04 12:53:27,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:27,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:27,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:27,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:27,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:27,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:27,305 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 12:53:27,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:27,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:27,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:27,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-04 12:53:27,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:53:27,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:53:27,520 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:27,520 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 10 states. [2018-10-04 12:53:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:27,826 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-04 12:53:27,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:53:27,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-04 12:53:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:27,828 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:53:27,829 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:53:27,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 7 [2018-10-04 12:53:27,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:53:27,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:53:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:53:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-04 12:53:27,836 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-04 12:53:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:27,837 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-04 12:53:27,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:53:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-04 12:53:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:53:27,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:27,839 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 12:53:27,839 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:27,839 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:27,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1765270407, now seen corresponding path program 2 times [2018-10-04 12:53:27,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:27,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:27,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:27,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:27,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:28,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:28,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:53:28,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:53:28,112 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:53:28,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:28,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:28,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:28,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-04 12:53:28,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:53:28,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:53:28,229 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:28,229 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-04 12:53:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:28,430 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-04 12:53:28,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:53:28,433 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-04 12:53:28,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:28,434 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:53:28,434 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:53:28,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 7 [2018-10-04 12:53:28,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:53:28,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-04 12:53:28,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:53:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-04 12:53:28,440 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-04 12:53:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:28,440 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-04 12:53:28,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:53:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-04 12:53:28,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:53:28,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:28,441 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-04 12:53:28,442 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:28,442 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:28,442 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 3 times [2018-10-04 12:53:28,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:28,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:28,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:28,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:28,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:28,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:28,549 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 12:53:28,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:53:28,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:53:28,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:28,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:29,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:29,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-04 12:53:29,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:53:29,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:53:29,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:29,111 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-10-04 12:53:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:29,300 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-04 12:53:29,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:53:29,301 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-04 12:53:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:29,302 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:53:29,302 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:53:29,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 7 [2018-10-04 12:53:29,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:53:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:53:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:53:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-04 12:53:29,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-10-04 12:53:29,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:29,307 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-04 12:53:29,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:53:29,307 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-04 12:53:29,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:53:29,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:29,308 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-10-04 12:53:29,308 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:29,309 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:29,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1096334355, now seen corresponding path program 4 times [2018-10-04 12:53:29,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:29,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:29,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:29,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:29,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:29,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:29,622 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 12:53:29,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:53:29,646 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:53:29,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:29,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:29,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:29,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-04 12:53:29,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:53:29,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:53:29,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:29,729 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-04 12:53:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:29,831 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-04 12:53:29,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:53:29,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 12:53:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:29,833 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:53:29,833 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:53:29,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 9 [2018-10-04 12:53:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:53:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-04 12:53:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:53:29,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-04 12:53:29,840 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-04 12:53:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:29,841 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-04 12:53:29,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:53:29,841 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-04 12:53:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:53:29,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:29,842 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-04 12:53:29,842 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:29,842 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:29,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 5 times [2018-10-04 12:53:29,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:29,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:29,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:29,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:29,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:29,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:29,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:29,990 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 12:53:30,006 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:53:30,035 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:53:30,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:30,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:30,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:30,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-04 12:53:30,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:53:30,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:53:30,194 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:30,195 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2018-10-04 12:53:30,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:30,448 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-04 12:53:30,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:53:30,449 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-04 12:53:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:30,449 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:53:30,450 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:53:30,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 8 [2018-10-04 12:53:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:53:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:53:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:53:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-04 12:53:30,455 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-04 12:53:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:30,455 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-04 12:53:30,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:53:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-04 12:53:30,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:53:30,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:30,457 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-04 12:53:30,457 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:30,457 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:30,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1330040479, now seen corresponding path program 6 times [2018-10-04 12:53:30,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:30,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:30,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:30,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:30,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:30,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:30,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:30,619 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 12:53:30,630 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:53:30,649 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 12:53:30,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:30,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:30,738 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:30,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-04 12:53:30,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:53:30,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:53:30,739 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:30,739 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-04 12:53:30,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:30,859 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-04 12:53:30,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:53:30,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-04 12:53:30,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:30,861 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:53:30,861 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:53:30,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 11 [2018-10-04 12:53:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:53:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-10-04 12:53:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:53:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-04 12:53:30,868 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-04 12:53:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:30,868 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-04 12:53:30,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:53:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-04 12:53:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:53:30,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:30,869 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-04 12:53:30,870 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:30,870 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:30,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 7 times [2018-10-04 12:53:30,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:30,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:30,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:30,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:30,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:31,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:31,002 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 12:53:31,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:31,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:31,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:31,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-04 12:53:31,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:53:31,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:53:31,390 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:31,390 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-10-04 12:53:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:31,771 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-04 12:53:31,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:53:31,771 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-04 12:53:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:31,772 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:53:31,773 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:53:31,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 9 [2018-10-04 12:53:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:53:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:53:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:53:31,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-04 12:53:31,779 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-04 12:53:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:31,779 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-04 12:53:31,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:53:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-04 12:53:31,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:53:31,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:31,781 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-04 12:53:31,781 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:31,781 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1774380245, now seen corresponding path program 8 times [2018-10-04 12:53:31,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:31,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:31,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:31,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:31,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:31,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:31,898 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 12:53:31,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:53:31,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:53:31,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:31,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:32,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:32,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-04 12:53:32,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:53:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:53:32,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:32,226 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-10-04 12:53:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:32,433 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-04 12:53:32,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:53:32,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-10-04 12:53:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:32,434 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:53:32,435 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:53:32,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.0s impTime 13 [2018-10-04 12:53:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:53:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-04 12:53:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:53:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-04 12:53:32,441 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-04 12:53:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:32,442 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-04 12:53:32,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:53:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-04 12:53:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:53:32,443 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:32,443 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-04 12:53:32,443 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:32,443 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:32,443 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 9 times [2018-10-04 12:53:32,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:32,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:32,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:32,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:32,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:32,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:32,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:32,849 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 12:53:32,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:53:32,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:53:32,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:32,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:33,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:33,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-04 12:53:33,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:53:33,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:53:33,407 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:33,407 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 26 states. [2018-10-04 12:53:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:33,654 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-04 12:53:33,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:53:33,655 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-04 12:53:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:33,656 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:53:33,656 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:53:33,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 13 [2018-10-04 12:53:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:53:33,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:53:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:53:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-04 12:53:33,663 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-04 12:53:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:33,663 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-04 12:53:33,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:53:33,663 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-04 12:53:33,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:53:33,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:33,664 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-04 12:53:33,664 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:33,665 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1980325449, now seen corresponding path program 10 times [2018-10-04 12:53:33,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:33,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:33,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:33,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:33,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:33,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:33,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:53:33,884 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:53:33,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:53:33,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:33,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:34,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:34,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-04 12:53:34,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:53:34,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:53:34,157 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:34,157 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-04 12:53:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:34,367 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-04 12:53:34,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:53:34,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-04 12:53:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:34,369 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:53:34,369 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:53:34,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.0s impTime 15 [2018-10-04 12:53:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:53:34,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-04 12:53:34,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:53:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-04 12:53:34,378 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-10-04 12:53:34,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:34,378 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-04 12:53:34,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:53:34,379 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-04 12:53:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:53:34,379 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:34,379 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-04 12:53:34,380 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:34,380 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:34,380 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 11 times [2018-10-04 12:53:34,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:34,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:34,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:34,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:34,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:34,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:34,594 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 12:53:34,603 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:53:34,669 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:53:34,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:34,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:35,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:35,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-04 12:53:35,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:53:35,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:53:35,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:35,027 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 30 states. [2018-10-04 12:53:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:36,216 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-04 12:53:36,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:53:36,216 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-04 12:53:36,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:36,217 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:53:36,217 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:53:36,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 11 [2018-10-04 12:53:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:53:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:53:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:53:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-04 12:53:36,225 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-04 12:53:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:36,225 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-04 12:53:36,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:53:36,225 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-04 12:53:36,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:53:36,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:36,226 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-04 12:53:36,227 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:36,227 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:36,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1320051267, now seen corresponding path program 12 times [2018-10-04 12:53:36,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:36,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:36,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:36,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:36,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:36,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:36,452 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 12:53:36,462 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:53:36,491 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-04 12:53:36,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:36,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:36,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:36,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-04 12:53:36,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:53:36,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:53:36,667 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:36,667 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-10-04 12:53:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:36,886 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-04 12:53:36,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:53:36,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-10-04 12:53:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:36,887 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:53:36,887 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:53:36,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 17 [2018-10-04 12:53:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:53:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-04 12:53:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:53:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-04 12:53:36,894 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-04 12:53:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:36,894 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-04 12:53:36,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:53:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-04 12:53:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:53:36,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:36,895 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-04 12:53:36,895 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:36,895 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:36,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 13 times [2018-10-04 12:53:36,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:36,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:36,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:36,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:36,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:37,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:37,079 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 12:53:37,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:37,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:37,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:37,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-04 12:53:37,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:53:37,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:53:37,435 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:37,436 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 34 states. [2018-10-04 12:53:37,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:37,902 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-04 12:53:37,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:53:37,902 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-04 12:53:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:37,902 INFO L225 Difference]: With dead ends: 56 [2018-10-04 12:53:37,903 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:53:37,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 17 [2018-10-04 12:53:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:53:37,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:53:37,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:53:37,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-04 12:53:37,910 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-04 12:53:37,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:37,911 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-04 12:53:37,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:53:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-04 12:53:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:53:37,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:37,912 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-04 12:53:37,912 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:37,912 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:37,913 INFO L82 PathProgramCache]: Analyzing trace with hash 115385137, now seen corresponding path program 14 times [2018-10-04 12:53:37,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:37,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:37,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:37,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:37,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:38,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:38,082 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 12:53:38,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:53:38,113 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:53:38,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:38,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:38,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:38,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-04 12:53:38,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:53:38,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:53:38,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:38,231 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-04 12:53:38,769 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:53:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:38,850 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-04 12:53:38,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:53:38,851 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-04 12:53:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:38,852 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:53:38,853 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:53:38,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 7 [2018-10-04 12:53:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:53:38,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-04 12:53:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:53:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-04 12:53:38,869 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-04 12:53:38,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:38,869 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-04 12:53:38,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:53:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-04 12:53:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:53:38,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:38,870 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-04 12:53:38,870 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:38,870 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:38,872 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 15 times [2018-10-04 12:53:38,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:38,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:38,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:38,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:38,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:39,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:39,172 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 12:53:39,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:53:39,212 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:53:39,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:39,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:39,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:39,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-10-04 12:53:39,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:53:39,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:53:39,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:39,501 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 38 states. [2018-10-04 12:53:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:39,846 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-04 12:53:39,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:53:39,847 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-04 12:53:39,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:39,848 INFO L225 Difference]: With dead ends: 62 [2018-10-04 12:53:39,848 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:53:39,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 13 [2018-10-04 12:53:39,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:53:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:53:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:53:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-04 12:53:39,855 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-10-04 12:53:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:39,856 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-04 12:53:39,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:53:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-04 12:53:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:53:39,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:39,857 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-04 12:53:39,857 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:39,857 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash 830172837, now seen corresponding path program 16 times [2018-10-04 12:53:39,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:39,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:39,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:39,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:39,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:40,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:40,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:40,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:53:40,342 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:53:40,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:40,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:40,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:40,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-04 12:53:40,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:53:40,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:53:40,461 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:40,461 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-10-04 12:53:40,683 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:53:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:40,785 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-04 12:53:40,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:53:40,786 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-04 12:53:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:40,787 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:53:40,787 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:53:40,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 7 [2018-10-04 12:53:40,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:53:40,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-04 12:53:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:53:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-04 12:53:40,796 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-04 12:53:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:40,796 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-04 12:53:40,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:53:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-04 12:53:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:53:40,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:40,797 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-04 12:53:40,798 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:40,798 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:40,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 17 times [2018-10-04 12:53:40,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:40,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:40,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:40,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:40,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:42,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:42,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:42,762 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:53:42,798 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:53:42,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:42,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:42,923 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 7 [2018-10-04 12:53:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:43,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:43,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-10-04 12:53:43,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:53:43,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:53:43,200 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:43,200 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 42 states. [2018-10-04 12:53:43,652 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 23 new depth: 8 [2018-10-04 12:53:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:43,689 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-04 12:53:43,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:53:43,689 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-04 12:53:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:43,690 INFO L225 Difference]: With dead ends: 68 [2018-10-04 12:53:43,690 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:53:43,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.7s impTime 8 [2018-10-04 12:53:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:53:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:53:43,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:53:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-04 12:53:43,698 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-04 12:53:43,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:43,698 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-04 12:53:43,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:53:43,698 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-04 12:53:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:53:43,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:43,699 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-04 12:53:43,699 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:43,699 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:43,700 INFO L82 PathProgramCache]: Analyzing trace with hash 2070347801, now seen corresponding path program 18 times [2018-10-04 12:53:43,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:43,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:43,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:43,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:43,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:43,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:43,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:43,866 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:53:43,899 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-04 12:53:43,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:43,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:44,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:44,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-04 12:53:44,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:53:44,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:53:44,030 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:44,030 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-04 12:53:44,175 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:53:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:44,251 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-04 12:53:44,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:53:44,252 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-04 12:53:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:44,253 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:53:44,253 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:53:44,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 10 [2018-10-04 12:53:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:53:44,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-10-04 12:53:44,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:53:44,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-04 12:53:44,261 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-10-04 12:53:44,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:44,261 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-04 12:53:44,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:53:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-04 12:53:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:53:44,262 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:44,262 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-04 12:53:44,263 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:44,263 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 19 times [2018-10-04 12:53:44,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:44,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:44,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:44,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:44,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:44,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:44,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:44,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:44,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:44,776 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 7 [2018-10-04 12:53:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:45,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:45,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-10-04 12:53:45,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:53:45,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:53:45,094 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:45,094 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 46 states. [2018-10-04 12:53:45,528 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 23 new depth: 7 [2018-10-04 12:53:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:45,711 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-04 12:53:45,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:53:45,711 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-04 12:53:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:45,711 INFO L225 Difference]: With dead ends: 74 [2018-10-04 12:53:45,711 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:53:45,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 10 [2018-10-04 12:53:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:53:45,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:53:45,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:53:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-04 12:53:45,719 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-10-04 12:53:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:45,720 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-04 12:53:45,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:53:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-04 12:53:45,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:53:45,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:45,721 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-04 12:53:45,721 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:45,721 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:45,721 INFO L82 PathProgramCache]: Analyzing trace with hash 2120767373, now seen corresponding path program 20 times [2018-10-04 12:53:45,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:45,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:45,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:45,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:45,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:46,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:46,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:46,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:53:46,049 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:53:46,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:46,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:46,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:46,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-04 12:53:46,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:53:46,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:53:46,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:46,169 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-10-04 12:53:46,287 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:53:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:46,409 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-04 12:53:46,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:53:46,412 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-04 12:53:46,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:46,413 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:53:46,413 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:53:46,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 12 [2018-10-04 12:53:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:53:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-10-04 12:53:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:53:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-04 12:53:46,423 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-04 12:53:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:46,423 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-04 12:53:46,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:53:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-04 12:53:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:53:46,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:46,424 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-04 12:53:46,424 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:46,425 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:46,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 21 times [2018-10-04 12:53:46,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:46,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:46,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:46,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:46,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:46,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:46,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:46,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:53:46,778 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:53:46,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:46,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:47,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:47,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-10-04 12:53:47,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:53:47,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:53:47,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:47,198 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 50 states. [2018-10-04 12:53:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:47,886 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-04 12:53:47,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:53:47,887 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-04 12:53:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:47,887 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:53:47,887 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:53:47,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 16 [2018-10-04 12:53:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:53:47,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:53:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:53:47,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-04 12:53:47,896 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-04 12:53:47,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:47,896 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-04 12:53:47,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:53:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-04 12:53:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:53:47,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:47,897 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-04 12:53:47,897 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:47,897 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:47,897 INFO L82 PathProgramCache]: Analyzing trace with hash -473664255, now seen corresponding path program 22 times [2018-10-04 12:53:47,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:47,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:47,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:47,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:47,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:48,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:48,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:48,166 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:53:48,194 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:53:48,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:48,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:48,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:48,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-04 12:53:48,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:53:48,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:53:48,290 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:48,290 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-04 12:53:48,404 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:53:48,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:48,598 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-04 12:53:48,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:53:48,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-04 12:53:48,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:48,599 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:53:48,599 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:53:48,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 13 [2018-10-04 12:53:48,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:53:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-04 12:53:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:53:48,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-04 12:53:48,607 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-10-04 12:53:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:48,607 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-04 12:53:48,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:53:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-04 12:53:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:53:48,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:48,608 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-04 12:53:48,609 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:48,609 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:48,609 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 23 times [2018-10-04 12:53:48,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:48,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:48,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:48,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:48,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:48,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:48,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:48,933 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:53:48,984 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:53:48,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:48,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:49,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:49,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-10-04 12:53:49,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:53:49,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:53:49,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:49,479 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 54 states. [2018-10-04 12:53:49,923 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:53:50,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:50,287 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-04 12:53:50,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:53:50,287 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-04 12:53:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:50,288 INFO L225 Difference]: With dead ends: 86 [2018-10-04 12:53:50,288 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:53:50,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 13 [2018-10-04 12:53:50,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:53:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:53:50,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:53:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-04 12:53:50,295 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-04 12:53:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:50,295 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-04 12:53:50,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:53:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-04 12:53:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:53:50,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:50,296 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-04 12:53:50,296 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:50,297 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:50,297 INFO L82 PathProgramCache]: Analyzing trace with hash 608196725, now seen corresponding path program 24 times [2018-10-04 12:53:50,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:50,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:50,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:50,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:50,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:50,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:50,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:50,630 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:53:50,672 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-04 12:53:50,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:50,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:50,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:50,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-04 12:53:50,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:53:50,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:53:50,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:50,796 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-04 12:53:50,939 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:53:52,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:52,080 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-04 12:53:52,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:53:52,081 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-10-04 12:53:52,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:52,082 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:53:52,082 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:53:52,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 16 [2018-10-04 12:53:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:53:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-04 12:53:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:53:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-04 12:53:52,091 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-04 12:53:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:52,092 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-04 12:53:52,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:53:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-04 12:53:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:53:52,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:52,093 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-04 12:53:52,093 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:52,093 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:52,094 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 25 times [2018-10-04 12:53:52,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:52,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:52,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:52,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:52,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:52,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:52,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:52,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:52,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:53,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:53,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-10-04 12:53:53,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:53:53,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:53:53,092 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:53,092 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 58 states. [2018-10-04 12:53:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:54,692 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-04 12:53:54,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:53:54,692 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-04 12:53:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:54,693 INFO L225 Difference]: With dead ends: 92 [2018-10-04 12:53:54,693 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:53:54,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 18 [2018-10-04 12:53:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:53:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:53:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:53:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-04 12:53:54,702 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-04 12:53:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:54,702 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-04 12:53:54,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:53:54,702 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-04 12:53:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:53:54,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:54,703 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-04 12:53:54,703 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:54,703 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1210122729, now seen corresponding path program 26 times [2018-10-04 12:53:54,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:54,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:54,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:54,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:54,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:54,974 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:54,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:54,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:54,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:53:55,036 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:53:55,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:55,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:55,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:55,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-04 12:53:55,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:53:55,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:53:55,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:55,164 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-04 12:53:55,248 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:53:55,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:55,451 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-04 12:53:55,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:53:55,451 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-04 12:53:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:55,452 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:53:55,452 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:53:55,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 17 [2018-10-04 12:53:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:53:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-10-04 12:53:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:53:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-04 12:53:55,462 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-04 12:53:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:55,462 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-04 12:53:55,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:53:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-04 12:53:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:53:55,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:55,463 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-04 12:53:55,463 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:55,463 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:55,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 27 times [2018-10-04 12:53:55,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:55,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:55,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:55,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:55,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:56,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:56,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:56,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:53:56,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:53:56,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:56,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:57,551 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:57,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-10-04 12:53:57,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:53:57,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:53:57,552 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:57,552 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 62 states. [2018-10-04 12:53:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:58,454 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-04 12:53:58,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:53:58,454 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-04 12:53:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:58,455 INFO L225 Difference]: With dead ends: 98 [2018-10-04 12:53:58,455 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:53:58,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 19 [2018-10-04 12:53:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:53:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:53:58,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:53:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-04 12:53:58,465 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-10-04 12:53:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:58,466 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-04 12:53:58,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:53:58,466 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-04 12:53:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:53:58,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:58,466 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-04 12:53:58,467 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:58,467 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:58,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1490325155, now seen corresponding path program 28 times [2018-10-04 12:53:58,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:58,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:58,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:58,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:58,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:58,704 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:53:58,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:53:58,714 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:53:58,755 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:53:58,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:58,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:58,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:53:58,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-04 12:53:58,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:53:58,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:53:58,967 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:58,967 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-10-04 12:53:59,036 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:53:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:59,261 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-04 12:53:59,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:53:59,261 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-10-04 12:53:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:59,262 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:53:59,262 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:53:59,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 20 [2018-10-04 12:53:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:53:59,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-10-04 12:53:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:53:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-04 12:53:59,272 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-04 12:53:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:59,273 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-04 12:53:59,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:53:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-04 12:53:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:53:59,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:59,273 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-04 12:53:59,274 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:59,274 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:59,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 29 times [2018-10-04 12:53:59,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:59,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:59,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:59,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:59,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:00,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:00,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:00,149 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:00,196 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:54:00,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:00,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:00,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:00,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-10-04 12:54:00,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:54:00,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:54:00,841 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:00,841 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 66 states. [2018-10-04 12:54:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:01,922 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-04 12:54:01,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:54:01,922 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-04 12:54:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:01,923 INFO L225 Difference]: With dead ends: 104 [2018-10-04 12:54:01,923 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:54:01,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 20 [2018-10-04 12:54:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:54:01,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:54:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:54:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-04 12:54:01,931 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-04 12:54:01,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:01,931 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-04 12:54:01,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:54:01,932 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-04 12:54:01,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:54:01,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:01,932 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-04 12:54:01,932 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:01,933 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1465604399, now seen corresponding path program 30 times [2018-10-04 12:54:01,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:01,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:01,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:01,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:01,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:02,690 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:02,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:02,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:02,702 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:02,751 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-04 12:54:02,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:02,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:02,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:02,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-04 12:54:02,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:54:02,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:54:02,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:02,889 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-04 12:54:03,189 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:03,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:03,212 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-04 12:54:03,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:54:03,212 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-04 12:54:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:03,214 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:54:03,214 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:54:03,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.5s impTime 7 [2018-10-04 12:54:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:54:03,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-10-04 12:54:03,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:54:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-04 12:54:03,227 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-10-04 12:54:03,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:03,227 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-04 12:54:03,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:54:03,227 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-04 12:54:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:54:03,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:03,228 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-04 12:54:03,228 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:03,228 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:03,228 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 31 times [2018-10-04 12:54:03,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:03,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:03,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:03,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:03,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:03,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:03,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:03,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:03,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:04,034 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:04,631 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:04,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:04,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-10-04 12:54:04,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:54:04,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:54:04,652 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:04,652 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 70 states. [2018-10-04 12:54:04,851 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:05,878 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-04 12:54:05,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:54:05,878 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-04 12:54:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:05,879 INFO L225 Difference]: With dead ends: 110 [2018-10-04 12:54:05,879 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:54:05,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.1s impTime 21 [2018-10-04 12:54:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:54:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:54:05,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:54:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-04 12:54:05,891 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-10-04 12:54:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:05,891 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-04 12:54:05,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:54:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-04 12:54:05,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:54:05,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:05,892 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-04 12:54:05,892 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:05,892 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2091802043, now seen corresponding path program 32 times [2018-10-04 12:54:05,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:05,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:05,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:05,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:05,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:06,351 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:06,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:06,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:06,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:06,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:06,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:06,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:06,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:06,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-04 12:54:06,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:54:06,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:54:06,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:06,972 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-10-04 12:54:07,306 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:07,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:07,370 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-04 12:54:07,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:54:07,370 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-10-04 12:54:07,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:07,372 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:54:07,372 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:54:07,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.3s impTime 8 [2018-10-04 12:54:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:54:07,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-04 12:54:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:54:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-04 12:54:07,383 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-04 12:54:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:07,383 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-04 12:54:07,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:54:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-04 12:54:07,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:54:07,383 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:07,384 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-04 12:54:07,384 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:07,384 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:07,384 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 33 times [2018-10-04 12:54:07,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:07,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:07,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:07,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:07,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:08,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:08,103 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:08,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:08,171 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:54:08,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:08,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:08,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:08,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-10-04 12:54:08,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:54:08,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:54:08,971 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:08,971 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 74 states. [2018-10-04 12:54:10,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:10,053 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-04 12:54:10,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:54:10,053 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-04 12:54:10,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:10,054 INFO L225 Difference]: With dead ends: 116 [2018-10-04 12:54:10,054 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:54:10,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 22 [2018-10-04 12:54:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:54:10,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:54:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:54:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-04 12:54:10,065 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-04 12:54:10,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:10,066 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-04 12:54:10,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:54:10,066 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-04 12:54:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:54:10,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:10,066 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-04 12:54:10,067 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:10,067 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:10,067 INFO L82 PathProgramCache]: Analyzing trace with hash -42507335, now seen corresponding path program 34 times [2018-10-04 12:54:10,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:10,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:10,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:10,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:10,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:10,332 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:10,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:10,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:10,390 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:54:10,439 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:54:10,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:10,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:10,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:10,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-04 12:54:10,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:54:10,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:54:10,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:10,634 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-04 12:54:10,947 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:11,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:11,028 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-04 12:54:11,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:54:11,029 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-04 12:54:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:11,030 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:54:11,030 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:54:11,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 11 [2018-10-04 12:54:11,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:54:11,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-04 12:54:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:54:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-04 12:54:11,041 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-10-04 12:54:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:11,042 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-04 12:54:11,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:54:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-04 12:54:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:54:11,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:11,043 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-04 12:54:11,043 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:11,043 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:11,043 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 35 times [2018-10-04 12:54:11,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:11,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:11,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:11,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:11,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:11,571 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:11,875 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:11,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:11,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:11,930 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:11,986 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:54:11,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:11,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:12,841 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:54:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:12,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:12,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-10-04 12:54:12,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:54:12,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:54:12,934 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:12,934 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 78 states. [2018-10-04 12:54:14,387 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:54:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:14,504 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-04 12:54:14,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:54:14,504 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-04 12:54:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:14,505 INFO L225 Difference]: With dead ends: 122 [2018-10-04 12:54:14,505 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 12:54:14,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 1.6s impTime 8 [2018-10-04 12:54:14,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 12:54:14,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 12:54:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 12:54:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-04 12:54:14,516 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-04 12:54:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:14,516 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-04 12:54:14,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:54:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-04 12:54:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:54:14,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:14,517 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-04 12:54:14,517 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:14,517 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:14,518 INFO L82 PathProgramCache]: Analyzing trace with hash 752544557, now seen corresponding path program 36 times [2018-10-04 12:54:14,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:14,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:14,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:14,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:14,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:14,757 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:14,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:14,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:14,812 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:14,870 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 12:54:14,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:14,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:15,049 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:15,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-04 12:54:15,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:54:15,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:54:15,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:15,050 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-04 12:54:15,355 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:15,471 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-04 12:54:15,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:54:15,472 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-04 12:54:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:15,473 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:54:15,473 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:54:15,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 12 [2018-10-04 12:54:15,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:54:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-04 12:54:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:54:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-04 12:54:15,493 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-04 12:54:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:15,493 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-04 12:54:15,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:54:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-04 12:54:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:54:15,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:15,517 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-04 12:54:15,517 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:15,517 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:15,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 37 times [2018-10-04 12:54:15,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:15,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:15,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:15,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:15,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:16,057 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:16,420 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:16,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:16,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:16,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:16,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:17,760 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:17,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:17,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-10-04 12:54:17,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:54:17,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:54:17,880 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:17,880 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 82 states. [2018-10-04 12:54:19,020 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:54:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:19,332 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-04 12:54:19,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:54:19,332 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-04 12:54:19,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:19,333 INFO L225 Difference]: With dead ends: 128 [2018-10-04 12:54:19,333 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 12:54:19,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 1.7s impTime 12 [2018-10-04 12:54:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 12:54:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 12:54:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:54:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-04 12:54:19,346 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-04 12:54:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:19,346 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-04 12:54:19,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:54:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-04 12:54:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 12:54:19,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:19,346 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-04 12:54:19,347 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:19,347 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:19,347 INFO L82 PathProgramCache]: Analyzing trace with hash 918632609, now seen corresponding path program 38 times [2018-10-04 12:54:19,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:19,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:19,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:19,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:19,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:20,185 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:20,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:20,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:20,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:20,302 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:20,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:20,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:20,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:20,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-04 12:54:20,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:54:20,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:54:20,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:20,479 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-04 12:54:20,764 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:20,904 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-04 12:54:20,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:54:20,905 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-04 12:54:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:20,906 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:54:20,906 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:54:20,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 14 [2018-10-04 12:54:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:54:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-10-04 12:54:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:54:20,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-04 12:54:20,921 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-04 12:54:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:20,921 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-04 12:54:20,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:54:20,921 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-04 12:54:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:54:20,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:20,921 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-04 12:54:20,922 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:20,922 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:20,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 39 times [2018-10-04 12:54:20,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:20,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:20,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:20,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:20,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:21,280 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:21,443 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:21,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:21,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:21,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:21,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 12:54:21,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:21,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:22,522 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:22,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:22,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-10-04 12:54:22,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:54:22,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:54:22,678 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:22,678 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 86 states. [2018-10-04 12:54:23,587 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:24,265 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-04 12:54:24,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:54:24,265 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-04 12:54:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:24,266 INFO L225 Difference]: With dead ends: 134 [2018-10-04 12:54:24,266 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:54:24,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.6s impTime 17 [2018-10-04 12:54:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:54:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 12:54:24,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 12:54:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-04 12:54:24,278 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-10-04 12:54:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:24,278 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-04 12:54:24,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:54:24,278 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-04 12:54:24,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:54:24,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:24,279 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-04 12:54:24,279 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:24,279 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:24,279 INFO L82 PathProgramCache]: Analyzing trace with hash 267340821, now seen corresponding path program 40 times [2018-10-04 12:54:24,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:24,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:24,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:24,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:24,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:24,656 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:24,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:24,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:24,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:54:24,819 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:54:24,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:24,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:24,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:24,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-04 12:54:24,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:54:24,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:54:24,992 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:24,992 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-10-04 12:54:25,282 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:25,488 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-04 12:54:25,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:54:25,489 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-10-04 12:54:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:25,490 INFO L225 Difference]: With dead ends: 97 [2018-10-04 12:54:25,490 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:54:25,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 16 [2018-10-04 12:54:25,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:54:25,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-10-04 12:54:25,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:54:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-04 12:54:25,505 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-04 12:54:25,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:25,505 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-04 12:54:25,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:54:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-04 12:54:25,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:54:25,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:25,506 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-04 12:54:25,506 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:25,506 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:25,506 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 41 times [2018-10-04 12:54:25,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:25,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:25,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:25,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:25,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:25,921 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:26,325 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:26,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:26,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:26,455 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:26,528 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 12:54:26,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:26,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:28,470 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:28,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:28,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-10-04 12:54:28,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:54:28,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:54:28,895 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:28,895 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 90 states. [2018-10-04 12:54:30,172 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:54:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:31,197 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-04 12:54:31,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:54:31,197 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-04 12:54:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:31,198 INFO L225 Difference]: With dead ends: 140 [2018-10-04 12:54:31,198 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:54:31,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.4s impTime 19 [2018-10-04 12:54:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:54:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 12:54:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 12:54:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-04 12:54:31,212 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-04 12:54:31,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:31,212 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-04 12:54:31,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:54:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-04 12:54:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:54:31,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:31,213 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-04 12:54:31,214 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:31,214 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:31,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1017783689, now seen corresponding path program 42 times [2018-10-04 12:54:31,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:31,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:31,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:31,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:31,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:31,634 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:31,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:31,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:31,930 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:32,003 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-04 12:54:32,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:32,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:32,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:32,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-04 12:54:32,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:54:32,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:54:32,265 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:32,266 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-04 12:54:32,548 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:32,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:32,755 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-04 12:54:32,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:54:32,756 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-04 12:54:32,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:32,757 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:54:32,757 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:54:32,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 18 [2018-10-04 12:54:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:54:32,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-04 12:54:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:54:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-04 12:54:32,772 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-10-04 12:54:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:32,772 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-04 12:54:32,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:54:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-04 12:54:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:54:32,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:32,773 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-04 12:54:32,773 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:32,774 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:32,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 43 times [2018-10-04 12:54:32,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:32,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:32,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:32,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:32,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:32,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:33,116 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:33,352 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:33,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:33,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:33,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:33,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:34,131 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:34,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:34,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-10-04 12:54:34,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 12:54:34,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 12:54:34,359 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:34,359 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 94 states. [2018-10-04 12:54:35,271 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:36,551 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-04 12:54:36,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:54:36,551 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-04 12:54:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:36,552 INFO L225 Difference]: With dead ends: 146 [2018-10-04 12:54:36,552 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 12:54:36,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.9s impTime 21 [2018-10-04 12:54:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 12:54:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 12:54:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 12:54:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-04 12:54:36,566 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-10-04 12:54:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:36,567 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-04 12:54:36,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 12:54:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-04 12:54:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 12:54:36,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:36,567 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-04 12:54:36,568 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:36,568 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:36,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1867070211, now seen corresponding path program 44 times [2018-10-04 12:54:36,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:36,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:36,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:36,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:36,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:36,931 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:37,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:37,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:37,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:37,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:37,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:37,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:37,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:37,397 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-04 12:54:37,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:54:37,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:54:37,398 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:37,398 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-10-04 12:54:37,609 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:37,862 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-04 12:54:37,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:54:37,862 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-10-04 12:54:37,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:37,863 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:54:37,864 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:54:37,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.4s impTime 20 [2018-10-04 12:54:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:54:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-04 12:54:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:54:37,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-04 12:54:37,900 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-04 12:54:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:37,901 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-04 12:54:37,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:54:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-04 12:54:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:54:37,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:37,901 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-04 12:54:37,901 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:37,902 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:37,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 45 times [2018-10-04 12:54:37,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:37,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:37,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:37,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:37,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:37,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:38,253 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:38,688 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:38,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:38,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:38,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:54:38,947 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 12:54:38,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:38,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:39,329 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:39,997 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:40,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:40,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-10-04 12:54:40,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 12:54:40,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 12:54:40,199 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:40,199 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 98 states. [2018-10-04 12:54:42,082 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:42,948 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-04 12:54:42,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:54:42,949 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-04 12:54:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:42,949 INFO L225 Difference]: With dead ends: 152 [2018-10-04 12:54:42,950 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:54:42,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.6s impTime 18 [2018-10-04 12:54:42,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:54:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:54:42,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:54:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-04 12:54:42,970 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-04 12:54:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:42,970 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-04 12:54:42,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 12:54:42,970 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-04 12:54:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:54:42,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:42,971 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-04 12:54:42,971 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:42,971 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:42,971 INFO L82 PathProgramCache]: Analyzing trace with hash -279303567, now seen corresponding path program 46 times [2018-10-04 12:54:42,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:42,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:42,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:42,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:42,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:43,256 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:43,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:43,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:43,354 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:54:43,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:54:43,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:43,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:43,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:43,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-04 12:54:43,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:54:43,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:54:43,673 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:43,673 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-04 12:54:43,868 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:44,189 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:44,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:44,224 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-04 12:54:44,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:54:44,224 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-04 12:54:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:44,225 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:54:44,225 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 12:54:44,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.3s impTime 8 [2018-10-04 12:54:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 12:54:44,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-04 12:54:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:54:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-04 12:54:44,245 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-10-04 12:54:44,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:44,245 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-04 12:54:44,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:54:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-04 12:54:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:54:44,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:44,246 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-04 12:54:44,247 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:44,247 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:44,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 47 times [2018-10-04 12:54:44,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:44,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:44,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:44,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:44,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:44,793 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:45,260 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:45,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:45,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:45,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:54:45,559 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 12:54:45,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:45,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:46,436 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:47,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:47,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-10-04 12:54:47,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 12:54:47,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 12:54:47,016 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:47,016 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 102 states. [2018-10-04 12:54:47,828 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:49,803 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 10 [2018-10-04 12:54:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:50,139 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-04 12:54:50,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:54:50,139 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-04 12:54:50,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:50,140 INFO L225 Difference]: With dead ends: 158 [2018-10-04 12:54:50,140 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 12:54:50,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.0s impTime 10 [2018-10-04 12:54:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 12:54:50,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 12:54:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 12:54:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-04 12:54:50,156 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-04 12:54:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:50,157 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-04 12:54:50,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 12:54:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-04 12:54:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:54:50,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:50,157 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-04 12:54:50,158 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:50,158 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:50,158 INFO L82 PathProgramCache]: Analyzing trace with hash 190404069, now seen corresponding path program 48 times [2018-10-04 12:54:50,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:50,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:50,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:50,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:50,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:50,776 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:50,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:50,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:50,926 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:54:51,004 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-04 12:54:51,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:51,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:51,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:51,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-04 12:54:51,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:54:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:54:51,454 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:51,454 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-10-04 12:54:51,706 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:51,995 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:52,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:52,047 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-04 12:54:52,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:54:52,047 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-10-04 12:54:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:52,048 INFO L225 Difference]: With dead ends: 113 [2018-10-04 12:54:52,048 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 12:54:52,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.6s impTime 8 [2018-10-04 12:54:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 12:54:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-10-04 12:54:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 12:54:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-04 12:54:52,073 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-04 12:54:52,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:52,073 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-04 12:54:52,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:54:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-04 12:54:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 12:54:52,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:52,074 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-04 12:54:52,075 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:52,075 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 49 times [2018-10-04 12:54:52,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:52,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:52,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:52,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:54:52,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:52,850 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:53,347 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:54:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:53,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:53,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:53,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:53,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:53,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:54:54,090 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:54,904 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:54:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:55,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:54:55,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-10-04 12:54:55,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 12:54:55,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 12:54:55,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:54:55,270 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 106 states. [2018-10-04 12:54:56,494 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:54:58,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:54:58,513 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-04 12:54:58,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:54:58,513 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-04 12:54:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:54:58,514 INFO L225 Difference]: With dead ends: 164 [2018-10-04 12:54:58,514 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 12:54:58,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.4s impTime 23 [2018-10-04 12:54:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 12:54:58,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 12:54:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 12:54:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-04 12:54:58,533 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-04 12:54:58,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:54:58,533 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-04 12:54:58,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 12:54:58,533 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-04 12:54:58,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 12:54:58,534 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:54:58,534 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-04 12:54:58,534 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:54:58,534 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:54:58,534 INFO L82 PathProgramCache]: Analyzing trace with hash 653870937, now seen corresponding path program 50 times [2018-10-04 12:54:58,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:54:58,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:54:58,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:58,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:54:58,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:54:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:54:59,679 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:54:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:54:59,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:54:59,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:54:59,837 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:54:59,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:54:59,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:54:59,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:00,089 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:00,089 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-04 12:55:00,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:55:00,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:55:00,090 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:00,090 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-04 12:55:00,296 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:00,662 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:00,749 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-04 12:55:00,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:55:00,749 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-04 12:55:00,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:00,750 INFO L225 Difference]: With dead ends: 117 [2018-10-04 12:55:00,750 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 12:55:00,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.1s impTime 11 [2018-10-04 12:55:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 12:55:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-10-04 12:55:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 12:55:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-04 12:55:00,769 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-04 12:55:00,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:00,769 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-04 12:55:00,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:55:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-04 12:55:00,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 12:55:00,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:00,770 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-04 12:55:00,770 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:00,770 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:00,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 51 times [2018-10-04 12:55:00,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:00,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:00,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:00,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:00,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:01,143 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:01,712 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:01,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:01,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:02,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:55:02,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 12:55:02,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:02,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:03,387 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:55:04,115 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:55:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:04,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:04,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-10-04 12:55:04,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 12:55:04,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 12:55:04,207 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:04,207 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 110 states. [2018-10-04 12:55:05,531 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 12:55:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:06,217 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-04 12:55:06,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:55:06,218 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-04 12:55:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:06,219 INFO L225 Difference]: With dead ends: 170 [2018-10-04 12:55:06,219 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 12:55:06,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.0s impTime 18 [2018-10-04 12:55:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 12:55:06,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 12:55:06,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 12:55:06,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-04 12:55:06,241 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-10-04 12:55:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:06,241 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-04 12:55:06,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 12:55:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-04 12:55:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 12:55:06,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:06,242 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-04 12:55:06,242 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:06,242 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:06,242 INFO L82 PathProgramCache]: Analyzing trace with hash -738263347, now seen corresponding path program 52 times [2018-10-04 12:55:06,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:06,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:06,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:06,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:06,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:06,445 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:06,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:06,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:06,609 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:55:06,678 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:55:06,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:06,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:06,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:06,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-04 12:55:06,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:55:06,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:55:06,938 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:06,938 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-10-04 12:55:07,136 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:07,509 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:07,713 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-04 12:55:07,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:55:07,713 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-10-04 12:55:07,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:07,714 INFO L225 Difference]: With dead ends: 121 [2018-10-04 12:55:07,714 INFO L226 Difference]: Without dead ends: 119 [2018-10-04 12:55:07,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.4s impTime 13 [2018-10-04 12:55:07,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-04 12:55:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-04 12:55:07,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:55:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-04 12:55:07,740 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-04 12:55:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:07,741 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-04 12:55:07,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:55:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-04 12:55:07,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 12:55:07,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:07,742 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-04 12:55:07,742 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:07,742 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:07,742 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 53 times [2018-10-04 12:55:07,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:07,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:07,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:07,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:07,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:08,077 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:08,638 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:08,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:08,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:08,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:55:09,052 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 12:55:09,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:09,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:09,851 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:55:10,619 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 10 [2018-10-04 12:55:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:10,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:10,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-10-04 12:55:10,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-04 12:55:10,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-04 12:55:10,708 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:10,708 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 114 states. [2018-10-04 12:55:13,220 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 30 new depth: 10 [2018-10-04 12:55:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:14,015 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-04 12:55:14,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:55:14,015 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-10-04 12:55:14,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:14,016 INFO L225 Difference]: With dead ends: 176 [2018-10-04 12:55:14,016 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 12:55:14,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.2s impTime 14 [2018-10-04 12:55:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 12:55:14,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-04 12:55:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 12:55:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-04 12:55:14,035 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-04 12:55:14,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:14,036 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-04 12:55:14,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-04 12:55:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-04 12:55:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 12:55:14,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:14,037 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-04 12:55:14,037 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:14,037 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:14,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1280345023, now seen corresponding path program 54 times [2018-10-04 12:55:14,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:14,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:14,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:14,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:14,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:14,467 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:14,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:14,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:14,583 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:55:14,674 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-04 12:55:14,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:14,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:15,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:15,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-04 12:55:15,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:55:15,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:55:15,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:15,941 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-04 12:55:16,509 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:16,942 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:17,127 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-04 12:55:17,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:55:17,127 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-04 12:55:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:17,128 INFO L225 Difference]: With dead ends: 125 [2018-10-04 12:55:17,128 INFO L226 Difference]: Without dead ends: 123 [2018-10-04 12:55:17,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 0.5s impTime 15 [2018-10-04 12:55:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-04 12:55:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-04 12:55:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:55:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-04 12:55:17,154 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-10-04 12:55:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:17,155 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-04 12:55:17,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:55:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-04 12:55:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:55:17,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:17,155 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-04 12:55:17,156 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:17,156 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:17,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 55 times [2018-10-04 12:55:17,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:17,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:17,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:17,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:17,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:17,423 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:17,727 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:18,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:18,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:18,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:18,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:18,740 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:55:19,395 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:55:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:19,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:19,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-10-04 12:55:19,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-04 12:55:19,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-04 12:55:19,814 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:19,814 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 118 states. [2018-10-04 12:55:20,782 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 12:55:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:22,827 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-04 12:55:22,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:55:22,827 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-10-04 12:55:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:22,828 INFO L225 Difference]: With dead ends: 182 [2018-10-04 12:55:22,828 INFO L226 Difference]: Without dead ends: 121 [2018-10-04 12:55:22,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 2.8s impTime 27 [2018-10-04 12:55:22,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-04 12:55:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-04 12:55:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-04 12:55:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-04 12:55:22,847 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-10-04 12:55:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:22,848 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-04 12:55:22,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-04 12:55:22,848 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-04 12:55:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-04 12:55:22,848 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:22,848 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-04 12:55:22,849 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:22,849 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:22,849 INFO L82 PathProgramCache]: Analyzing trace with hash 919584693, now seen corresponding path program 56 times [2018-10-04 12:55:22,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:22,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:22,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:22,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:22,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:23,183 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:23,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:23,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:23,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:55:23,474 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:55:23,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:23,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:23,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:23,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-04 12:55:23,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:55:23,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:55:23,851 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:23,851 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-10-04 12:55:24,024 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:24,306 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:24,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:24,513 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-04 12:55:24,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:55:24,513 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-10-04 12:55:24,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:24,514 INFO L225 Difference]: With dead ends: 129 [2018-10-04 12:55:24,514 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 12:55:24,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.6s impTime 15 [2018-10-04 12:55:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 12:55:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-10-04 12:55:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-04 12:55:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-04 12:55:24,537 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-04 12:55:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:24,537 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-04 12:55:24,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:55:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-04 12:55:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-04 12:55:24,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:24,538 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-04 12:55:24,538 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:24,539 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:24,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 57 times [2018-10-04 12:55:24,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:24,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:24,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:24,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:24,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:24,745 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:25,375 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:25,775 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:25,775 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:25,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:55:25,918 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 12:55:25,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:25,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:26,276 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:55:27,343 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:55:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:27,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:27,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 121 [2018-10-04 12:55:27,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-04 12:55:27,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-04 12:55:27,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:27,862 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 122 states. [2018-10-04 12:55:29,373 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 12:55:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:31,521 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-04 12:55:31,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:55:31,522 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-10-04 12:55:31,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:31,522 INFO L225 Difference]: With dead ends: 188 [2018-10-04 12:55:31,522 INFO L226 Difference]: Without dead ends: 125 [2018-10-04 12:55:31,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 3.5s impTime 26 [2018-10-04 12:55:31,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-04 12:55:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-04 12:55:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 12:55:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-04 12:55:31,546 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-04 12:55:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:31,547 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-04 12:55:31,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-04 12:55:31,547 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-04 12:55:31,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 12:55:31,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:31,547 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-04 12:55:31,548 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:31,548 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:31,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080489, now seen corresponding path program 58 times [2018-10-04 12:55:31,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:31,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:31,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:31,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:31,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:31,897 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:32,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:32,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:32,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:55:32,257 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:55:32,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:32,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:32,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:32,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-04 12:55:32,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:55:32,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:55:32,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:32,478 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-04 12:55:32,654 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:33,001 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:33,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:33,300 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-04 12:55:33,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:55:33,300 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-04 12:55:33,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:33,301 INFO L225 Difference]: With dead ends: 133 [2018-10-04 12:55:33,301 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 12:55:33,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 19 [2018-10-04 12:55:33,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 12:55:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-10-04 12:55:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-04 12:55:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-04 12:55:33,336 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-10-04 12:55:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:33,336 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-04 12:55:33,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:55:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-04 12:55:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-04 12:55:33,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:33,337 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-04 12:55:33,337 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:33,337 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:33,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 59 times [2018-10-04 12:55:33,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:33,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:33,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:33,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:33,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:33,732 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:34,687 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:35,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:35,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:35,291 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:55:35,392 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 12:55:35,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:35,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:36,137 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:55:36,960 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:55:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:37,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:37,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2018-10-04 12:55:37,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-04 12:55:37,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-04 12:55:37,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:37,255 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 126 states. [2018-10-04 12:55:38,739 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 12:55:40,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:40,192 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-04 12:55:40,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:55:40,192 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-10-04 12:55:40,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:40,193 INFO L225 Difference]: With dead ends: 194 [2018-10-04 12:55:40,193 INFO L226 Difference]: Without dead ends: 129 [2018-10-04 12:55:40,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 3.7s impTime 24 [2018-10-04 12:55:40,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-04 12:55:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-04 12:55:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 12:55:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-04 12:55:40,216 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-04 12:55:40,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:40,216 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-04 12:55:40,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-04 12:55:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-04 12:55:40,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 12:55:40,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:40,217 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-04 12:55:40,217 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:40,217 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:40,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2012453021, now seen corresponding path program 60 times [2018-10-04 12:55:40,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:40,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:40,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:40,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:40,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:40,389 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:40,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:40,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:40,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:40,643 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:55:40,748 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-04 12:55:40,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:40,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:40,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:40,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-04 12:55:40,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:55:40,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:55:40,976 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:40,976 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-10-04 12:55:41,112 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:41,533 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:41,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:41,849 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-04 12:55:41,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:55:41,849 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-10-04 12:55:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:41,850 INFO L225 Difference]: With dead ends: 137 [2018-10-04 12:55:41,850 INFO L226 Difference]: Without dead ends: 135 [2018-10-04 12:55:41,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 21 [2018-10-04 12:55:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-04 12:55:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-10-04 12:55:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-04 12:55:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-04 12:55:41,876 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-04 12:55:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:41,876 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-04 12:55:41,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:55:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-04 12:55:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-04 12:55:41,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:41,877 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-04 12:55:41,877 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:41,877 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 61 times [2018-10-04 12:55:41,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:41,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:41,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:41,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:41,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:42,268 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:42,984 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:43,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:43,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:43,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:43,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:44,481 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:55:45,066 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:55:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:45,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:45,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 129 [2018-10-04 12:55:45,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-04 12:55:45,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-04 12:55:45,528 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:45,528 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 130 states. [2018-10-04 12:55:46,500 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 12:55:48,302 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 10 [2018-10-04 12:55:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:48,310 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-04 12:55:48,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:55:48,310 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-10-04 12:55:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:48,310 INFO L225 Difference]: With dead ends: 200 [2018-10-04 12:55:48,311 INFO L226 Difference]: Without dead ends: 133 [2018-10-04 12:55:48,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 3.5s impTime 10 [2018-10-04 12:55:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-04 12:55:48,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-04 12:55:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 12:55:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-04 12:55:48,336 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-04 12:55:48,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:48,336 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-04 12:55:48,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-04 12:55:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-04 12:55:48,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 12:55:48,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:48,337 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-04 12:55:48,337 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:48,337 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash -452907503, now seen corresponding path program 62 times [2018-10-04 12:55:48,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:48,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:48,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:48,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:48,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:48,520 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:49,047 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:49,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:49,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:49,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:55:49,154 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:55:49,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:49,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:49,601 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:49,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-04 12:55:49,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:55:49,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:55:49,602 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:49,602 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-04 12:55:50,169 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:50,539 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-04 12:55:50,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:55:50,539 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-04 12:55:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:50,540 INFO L225 Difference]: With dead ends: 141 [2018-10-04 12:55:50,540 INFO L226 Difference]: Without dead ends: 139 [2018-10-04 12:55:50,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.9s impTime 23 [2018-10-04 12:55:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-04 12:55:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-04 12:55:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-04 12:55:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-04 12:55:50,567 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-04 12:55:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:50,567 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-04 12:55:50,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:55:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-04 12:55:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-04 12:55:50,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:50,568 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-04 12:55:50,568 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:50,569 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:50,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 63 times [2018-10-04 12:55:50,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:50,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:50,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:50,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:50,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:50,796 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:51,597 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:55:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:52,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:52,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:52,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:55:52,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 12:55:52,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:52,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:52,761 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 12:55:54,214 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 12:55:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:54,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:54,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-10-04 12:55:54,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-04 12:55:54,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-04 12:55:54,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:54,844 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 134 states. [2018-10-04 12:55:55,582 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 12:55:57,552 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:55:58,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:58,117 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-04 12:55:58,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:55:58,117 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-10-04 12:55:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:58,118 INFO L225 Difference]: With dead ends: 206 [2018-10-04 12:55:58,118 INFO L226 Difference]: Without dead ends: 137 [2018-10-04 12:55:58,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s Time 4.4s impTime 14 [2018-10-04 12:55:58,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-04 12:55:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-04 12:55:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-04 12:55:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-04 12:55:58,143 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-10-04 12:55:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:58,143 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-04 12:55:58,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-04 12:55:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-04 12:55:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-04 12:55:58,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:58,144 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-04 12:55:58,144 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:58,144 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash -745371259, now seen corresponding path program 64 times [2018-10-04 12:55:58,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:58,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:58,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:58,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:58,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:58,319 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:55:58,539 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:55:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:58,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:55:58,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:55:58,624 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:55:58,707 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:55:58,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:58,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:59,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:55:59,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-04 12:55:59,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:55:59,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:55:59,227 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:59,227 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-10-04 12:55:59,665 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:00,164 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:56:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:00,199 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-04 12:56:00,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:56:00,199 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-10-04 12:56:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:00,200 INFO L225 Difference]: With dead ends: 145 [2018-10-04 12:56:00,200 INFO L226 Difference]: Without dead ends: 143 [2018-10-04 12:56:00,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.8s impTime 8 [2018-10-04 12:56:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-04 12:56:00,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-04 12:56:00,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-04 12:56:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-04 12:56:00,236 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-04 12:56:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:00,237 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-04 12:56:00,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:56:00,237 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-04 12:56:00,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-04 12:56:00,238 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:00,238 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-04 12:56:00,238 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:00,238 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:00,238 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 65 times [2018-10-04 12:56:00,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:00,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:00,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:00,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:00,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:00,467 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:01,229 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:56:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:01,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:01,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:01,803 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:56:01,919 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 12:56:01,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:01,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:02,845 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 12:56:03,613 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 12:56:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:04,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:04,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 137 [2018-10-04 12:56:04,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-04 12:56:04,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-04 12:56:04,296 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:04,296 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 138 states. [2018-10-04 12:56:05,434 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 12:56:07,541 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 10 [2018-10-04 12:56:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:07,968 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-04 12:56:07,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:56:07,968 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-10-04 12:56:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:07,969 INFO L225 Difference]: With dead ends: 212 [2018-10-04 12:56:07,969 INFO L226 Difference]: Without dead ends: 141 [2018-10-04 12:56:07,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.2s impTime 11 [2018-10-04 12:56:07,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-04 12:56:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-04 12:56:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-04 12:56:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-04 12:56:07,996 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-04 12:56:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:07,996 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-04 12:56:07,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-04 12:56:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-04 12:56:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-04 12:56:07,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:07,997 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-04 12:56:07,997 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:07,997 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash 32287481, now seen corresponding path program 66 times [2018-10-04 12:56:07,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:07,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:07,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:07,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:07,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:08,180 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:08,416 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:08,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:08,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:08,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:08,529 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:56:08,653 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-04 12:56:08,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:08,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:08,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:08,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-04 12:56:08,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:56:08,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:56:08,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:08,900 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-04 12:56:09,593 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:10,096 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:56:10,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:10,178 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-04 12:56:10,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:56:10,178 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-04 12:56:10,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:10,180 INFO L225 Difference]: With dead ends: 149 [2018-10-04 12:56:10,180 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 12:56:10,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 10 [2018-10-04 12:56:10,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 12:56:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-10-04 12:56:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 12:56:10,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-04 12:56:10,210 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-10-04 12:56:10,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:10,210 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-04 12:56:10,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:56:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-04 12:56:10,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 12:56:10,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:10,211 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-04 12:56:10,211 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:10,211 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:10,212 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 67 times [2018-10-04 12:56:10,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:10,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:10,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:10,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:10,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:10,460 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:10,658 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:10,895 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:56:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:11,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:11,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:11,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:56:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:11,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:12,053 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 12:56:12,541 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 9 [2018-10-04 12:56:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:12,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:12,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 141 [2018-10-04 12:56:12,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-04 12:56:12,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-04 12:56:12,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:12,908 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 142 states. [2018-10-04 12:56:13,412 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 10 [2018-10-04 12:56:14,671 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 10 [2018-10-04 12:56:14,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:14,990 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-04 12:56:14,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:56:14,990 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-10-04 12:56:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:14,991 INFO L225 Difference]: With dead ends: 218 [2018-10-04 12:56:14,991 INFO L226 Difference]: Without dead ends: 145 [2018-10-04 12:56:14,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 2.5s impTime 15 [2018-10-04 12:56:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-04 12:56:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-04 12:56:15,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-04 12:56:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-04 12:56:15,029 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-10-04 12:56:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:15,029 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-04 12:56:15,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-04 12:56:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-04 12:56:15,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-04 12:56:15,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:15,030 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-04 12:56:15,030 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:15,030 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:15,030 INFO L82 PathProgramCache]: Analyzing trace with hash 2111083117, now seen corresponding path program 68 times [2018-10-04 12:56:15,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:15,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:15,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:15,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:56:15,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:15,238 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:15,423 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:15,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:15,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:15,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:56:15,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:56:15,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:15,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:15,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:15,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-04 12:56:15,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:56:15,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:56:15,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:15,844 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-10-04 12:56:16,197 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:16,693 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:56:16,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:16,776 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-04 12:56:16,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:56:16,776 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-10-04 12:56:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:16,778 INFO L225 Difference]: With dead ends: 153 [2018-10-04 12:56:16,778 INFO L226 Difference]: Without dead ends: 151 [2018-10-04 12:56:16,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 12 [2018-10-04 12:56:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-04 12:56:16,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-10-04 12:56:16,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 12:56:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-04 12:56:16,816 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-04 12:56:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:16,816 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-04 12:56:16,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:56:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-04 12:56:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 12:56:16,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:16,817 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-04 12:56:16,818 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:16,818 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:16,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 69 times [2018-10-04 12:56:16,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:16,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:16,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:16,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:16,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:17,114 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:17,383 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:17,598 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:56:18,014 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:56:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:18,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:18,041 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:18,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:56:18,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 12:56:18,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:18,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:19,277 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:56:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:19,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:19,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 145 [2018-10-04 12:56:19,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-04 12:56:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-04 12:56:19,881 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:19,881 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 146 states. [2018-10-04 12:56:20,225 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 12:56:21,198 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 10 [2018-10-04 12:56:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:21,622 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-10-04 12:56:21,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:56:21,622 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-10-04 12:56:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:21,623 INFO L225 Difference]: With dead ends: 224 [2018-10-04 12:56:21,623 INFO L226 Difference]: Without dead ends: 149 [2018-10-04 12:56:21,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 2.7s impTime 19 [2018-10-04 12:56:21,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-04 12:56:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-04 12:56:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 12:56:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-04 12:56:21,662 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-04 12:56:21,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:21,663 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-04 12:56:21,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-04 12:56:21,663 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-04 12:56:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 12:56:21,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:21,664 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-04 12:56:21,664 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:21,664 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:21,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1687109601, now seen corresponding path program 70 times [2018-10-04 12:56:21,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:21,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:21,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:21,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:21,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:21,882 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:22,113 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:22,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:22,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:22,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:56:22,348 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:56:22,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:22,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:22,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:22,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-04 12:56:22,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:56:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:56:22,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:22,623 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-04 12:56:23,038 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:23,561 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:56:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:23,739 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-04 12:56:23,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:56:23,739 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-04 12:56:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:23,741 INFO L225 Difference]: With dead ends: 157 [2018-10-04 12:56:23,741 INFO L226 Difference]: Without dead ends: 155 [2018-10-04 12:56:23,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.9s impTime 13 [2018-10-04 12:56:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-04 12:56:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-10-04 12:56:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-04 12:56:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-04 12:56:23,778 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-10-04 12:56:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:23,778 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-04 12:56:23,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:56:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-04 12:56:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-04 12:56:23,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:23,779 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-04 12:56:23,779 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:23,779 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:23,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 71 times [2018-10-04 12:56:23,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:23,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:23,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:23,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:23,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:24,096 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:24,272 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:24,899 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:56:25,637 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:56:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:25,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:25,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:25,712 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:56:25,842 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 12:56:25,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:25,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:27,467 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:56:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:28,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:28,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 149 [2018-10-04 12:56:28,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-04 12:56:28,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-04 12:56:28,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:28,213 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 150 states. [2018-10-04 12:56:28,809 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:56:31,130 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:56:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:32,665 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-10-04 12:56:32,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:56:32,666 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-10-04 12:56:32,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:32,666 INFO L225 Difference]: With dead ends: 230 [2018-10-04 12:56:32,667 INFO L226 Difference]: Without dead ends: 153 [2018-10-04 12:56:32,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s Time 4.9s impTime 21 [2018-10-04 12:56:32,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-04 12:56:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-04 12:56:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-04 12:56:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-04 12:56:32,705 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-04 12:56:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:32,705 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-04 12:56:32,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-04 12:56:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-04 12:56:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-04 12:56:32,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:32,706 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-04 12:56:32,706 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:32,707 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:32,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1562266795, now seen corresponding path program 72 times [2018-10-04 12:56:32,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:32,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:32,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:32,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:32,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:32,966 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:33,128 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:33,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:33,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:33,284 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:56:33,419 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-04 12:56:33,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:33,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:33,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:33,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-04 12:56:33,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:56:33,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:56:33,693 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:33,693 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-10-04 12:56:34,047 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:34,505 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:56:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:34,834 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-10-04 12:56:34,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:56:34,835 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-10-04 12:56:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:34,836 INFO L225 Difference]: With dead ends: 161 [2018-10-04 12:56:34,836 INFO L226 Difference]: Without dead ends: 159 [2018-10-04 12:56:34,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.9s impTime 16 [2018-10-04 12:56:34,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-04 12:56:34,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-04 12:56:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-04 12:56:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-04 12:56:34,869 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-04 12:56:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:34,870 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-04 12:56:34,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:56:34,870 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-04 12:56:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-04 12:56:34,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:34,870 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-04 12:56:34,870 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:34,871 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:34,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 73 times [2018-10-04 12:56:34,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:34,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:34,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:34,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:34,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:35,183 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:35,623 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:36,191 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:56:36,803 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:56:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:36,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:36,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:36,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:56:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:37,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:38,696 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:56:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:39,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:39,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 153 [2018-10-04 12:56:39,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-04 12:56:39,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-04 12:56:39,520 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:39,520 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 154 states. [2018-10-04 12:56:39,904 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:56:42,142 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 10 [2018-10-04 12:56:43,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:43,973 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-04 12:56:43,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:56:43,973 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-10-04 12:56:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:43,974 INFO L225 Difference]: With dead ends: 236 [2018-10-04 12:56:43,974 INFO L226 Difference]: Without dead ends: 157 [2018-10-04 12:56:43,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s Time 5.0s impTime 26 [2018-10-04 12:56:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-04 12:56:44,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-04 12:56:44,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 12:56:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-04 12:56:44,006 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-04 12:56:44,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:44,007 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-04 12:56:44,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-04 12:56:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-04 12:56:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 12:56:44,007 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:44,007 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-04 12:56:44,008 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:44,008 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:44,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1257182007, now seen corresponding path program 74 times [2018-10-04 12:56:44,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:44,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:44,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:44,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:56:44,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:44,282 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:44,444 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:44,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:44,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:44,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:56:44,709 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:56:44,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:44,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:45,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:45,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-04 12:56:45,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:56:45,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:56:45,152 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:45,152 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-04 12:56:45,509 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:45,910 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:56:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:46,090 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-04 12:56:46,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:56:46,091 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-04 12:56:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:46,093 INFO L225 Difference]: With dead ends: 165 [2018-10-04 12:56:46,093 INFO L226 Difference]: Without dead ends: 163 [2018-10-04 12:56:46,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.7s impTime 17 [2018-10-04 12:56:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-04 12:56:46,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-04 12:56:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-04 12:56:46,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-04 12:56:46,133 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-04 12:56:46,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:46,134 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-04 12:56:46,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:56:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-04 12:56:46,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-04 12:56:46,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:46,135 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-04 12:56:46,135 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:46,135 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:46,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 75 times [2018-10-04 12:56:46,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:46,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:46,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:46,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:46,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:46,403 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:46,602 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:47,048 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:56:47,803 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:56:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:47,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:47,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:47,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:56:48,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 12:56:48,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:48,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:49,843 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:56:50,918 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:56:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:50,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:50,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 157 [2018-10-04 12:56:50,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-04 12:56:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-04 12:56:50,986 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:50,986 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 158 states. [2018-10-04 12:56:53,258 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:56:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:55,555 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-10-04 12:56:55,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:56:55,555 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-10-04 12:56:55,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:55,556 INFO L225 Difference]: With dead ends: 242 [2018-10-04 12:56:55,556 INFO L226 Difference]: Without dead ends: 161 [2018-10-04 12:56:55,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s Time 5.2s impTime 27 [2018-10-04 12:56:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-04 12:56:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-04 12:56:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 12:56:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-04 12:56:55,595 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-10-04 12:56:55,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:55,595 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-04 12:56:55,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-04 12:56:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-04 12:56:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 12:56:55,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:55,596 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-04 12:56:55,597 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:55,597 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:55,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1726082109, now seen corresponding path program 76 times [2018-10-04 12:56:55,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:55,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:55,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:55,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:55,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:55,811 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:56,030 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:56,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:56,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:56,235 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:56:56,329 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:56:56,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:56,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:56,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:56:56,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-04 12:56:56,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:56:56,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:56:56,603 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:56,603 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-10-04 12:56:56,967 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:57,428 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:56:57,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:57,725 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-04 12:56:57,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:56:57,725 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-10-04 12:56:57,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:57,727 INFO L225 Difference]: With dead ends: 169 [2018-10-04 12:56:57,727 INFO L226 Difference]: Without dead ends: 167 [2018-10-04 12:56:57,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.9s impTime 20 [2018-10-04 12:56:57,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-04 12:56:57,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-10-04 12:56:57,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-04 12:56:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-04 12:56:57,765 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-04 12:56:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:57,766 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-04 12:56:57,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:56:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-04 12:56:57,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-04 12:56:57,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:57,767 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-04 12:56:57,767 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:57,767 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:57,767 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 77 times [2018-10-04 12:56:57,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:57,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:57,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:57,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:57,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:56:58,021 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:56:58,466 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:56:58,689 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:56:59,072 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:56:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:59,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:56:59,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:56:59,209 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:56:59,358 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 12:56:59,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:59,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:00,855 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:57:01,347 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 10 [2018-10-04 12:57:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:01,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:01,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 161 [2018-10-04 12:57:01,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-04 12:57:01,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-04 12:57:01,484 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:01,485 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 162 states. [2018-10-04 12:57:02,342 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 10 [2018-10-04 12:57:03,262 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 10 [2018-10-04 12:57:03,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:03,270 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-04 12:57:03,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:57:03,270 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-10-04 12:57:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:03,271 INFO L225 Difference]: With dead ends: 248 [2018-10-04 12:57:03,271 INFO L226 Difference]: Without dead ends: 165 [2018-10-04 12:57:03,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.1s impTime 10 [2018-10-04 12:57:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-04 12:57:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-04 12:57:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-04 12:57:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-04 12:57:03,309 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-04 12:57:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:03,309 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-04 12:57:03,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-04 12:57:03,309 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-04 12:57:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-04 12:57:03,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:03,310 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-04 12:57:03,310 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:03,310 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1818644047, now seen corresponding path program 78 times [2018-10-04 12:57:03,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:03,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:03,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:03,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:03,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:03,508 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:57:03,636 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:57:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:03,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:03,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:03,747 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:57:03,898 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-04 12:57:03,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:03,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:04,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:04,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-04 12:57:04,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:57:04,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:57:04,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:04,271 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-10-04 12:57:04,569 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:57:05,004 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:57:05,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:05,444 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-10-04 12:57:05,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 12:57:05,445 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-10-04 12:57:05,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:05,446 INFO L225 Difference]: With dead ends: 173 [2018-10-04 12:57:05,446 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 12:57:05,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.7s impTime 20 [2018-10-04 12:57:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 12:57:05,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-10-04 12:57:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 12:57:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-04 12:57:05,484 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-10-04 12:57:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:05,484 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-04 12:57:05,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:57:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-04 12:57:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 12:57:05,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:05,485 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-04 12:57:05,485 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:05,485 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:05,485 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 79 times [2018-10-04 12:57:05,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:05,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:05,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:05,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:05,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:05,703 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:57:05,956 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:57:06,123 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:57:06,383 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:57:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:06,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:06,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:06,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:57:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:06,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:07,225 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:57:08,331 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 12:57:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:09,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:09,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 165 [2018-10-04 12:57:09,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-10-04 12:57:09,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-10-04 12:57:09,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:09,041 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 166 states. [2018-10-04 12:57:09,516 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:57:11,658 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:57:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:13,602 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-10-04 12:57:13,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 12:57:13,602 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 166 [2018-10-04 12:57:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:13,603 INFO L225 Difference]: With dead ends: 254 [2018-10-04 12:57:13,603 INFO L226 Difference]: Without dead ends: 169 [2018-10-04 12:57:13,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s Time 4.1s impTime 26 [2018-10-04 12:57:13,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-04 12:57:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-04 12:57:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-04 12:57:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-04 12:57:13,639 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-10-04 12:57:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:13,640 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-04 12:57:13,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-10-04 12:57:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-04 12:57:13,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-04 12:57:13,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:13,640 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-10-04 12:57:13,641 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:13,641 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:13,641 INFO L82 PathProgramCache]: Analyzing trace with hash -436388571, now seen corresponding path program 80 times [2018-10-04 12:57:13,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:13,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:13,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:13,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:57:13,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:13,805 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:57:13,960 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:57:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:14,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:14,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:14,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:57:14,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:57:14,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:14,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:14,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:14,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-04 12:57:14,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:57:14,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:57:14,524 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:14,524 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-10-04 12:57:14,829 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:57:15,243 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:57:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:57:15,534 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-10-04 12:57:15,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 12:57:15,535 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-10-04 12:57:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:57:15,536 INFO L225 Difference]: With dead ends: 177 [2018-10-04 12:57:15,536 INFO L226 Difference]: Without dead ends: 175 [2018-10-04 12:57:15,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 22 [2018-10-04 12:57:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-04 12:57:15,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-10-04 12:57:15,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 12:57:15,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-04 12:57:15,597 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-10-04 12:57:15,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:57:15,597 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-04 12:57:15,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:57:15,597 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-04 12:57:15,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 12:57:15,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:57:15,598 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-04 12:57:15,598 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:57:15,598 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:57:15,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 81 times [2018-10-04 12:57:15,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:57:15,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:57:15,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:15,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:57:15,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:57:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:57:15,930 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:57:16,054 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:57:16,410 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 8 [2018-10-04 12:57:16,871 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 26 new depth: 8 [2018-10-04 12:57:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:17,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:57:17,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:57:17,056 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:57:17,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 12:57:17,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:57:17,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:57:18,002 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 9 [2018-10-04 12:57:18,718 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 29 new depth: 9 [2018-10-04 12:57:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:57:19,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:57:19,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 169 [2018-10-04 12:57:19,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-10-04 12:57:19,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-10-04 12:57:19,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:57:19,464 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 170 states. [2018-10-04 12:57:19,767 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 [2018-10-04 12:57:21,538 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 28 new depth: 9 Received shutdown request... [2018-10-04 12:57:22,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:57:22,263 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:57:22,270 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:57:22,270 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:57:22 BoogieIcfgContainer [2018-10-04 12:57:22,270 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:57:22,271 INFO L168 Benchmark]: Toolchain (without parser) took 236724.90 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -94.9 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 250.8 MB). Peak memory consumption was 155.9 MB. Max. memory is 7.1 GB. [2018-10-04 12:57:22,274 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:57:22,274 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:57:22,275 INFO L168 Benchmark]: Boogie Preprocessor took 18.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:57:22,275 INFO L168 Benchmark]: RCFGBuilder took 379.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:57:22,276 INFO L168 Benchmark]: TraceAbstraction took 236280.08 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -94.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 229.6 MB). Peak memory consumption was 134.7 MB. Max. memory is 7.1 GB. [2018-10-04 12:57:22,279 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 18.86 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 379.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236280.08 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -94.9 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 229.6 MB). Peak memory consumption was 134.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 80). Cancelled while BasicCegarLoop was constructing difference of abstraction (171states) and FLOYD_HOARE automaton (currently 72 states, 170 states before enhancement), while ReachableStatesComputation was computing reachable states (195 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 236.2s OverallTime, 83 OverallIterations, 42 TraceHistogramMax, 106.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1234 SDtfs, 916 SDslu, 6731 SDs, 0 SdLazy, 65513 SolverSat, 4186 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 39.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12692 GetRequests, 6268 SyntacticMatches, 0 SemanticMatches, 6424 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 162.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=171occurred in iteration=82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 82 MinimizatonAttempts, 164 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 5.7s SatisfiabilityAnalysisTime, 117.2s InterpolantComputationTime, 14594 NumberOfCodeBlocks, 14594 NumberOfCodeBlocksAsserted, 1051 NumberOfCheckSat, 14430 ConstructedInterpolants, 0 QuantifiedInterpolants, 8363807 SizeOfPredicates, 325 NumberOfNonLiveVariables, 29485 ConjunctsInSsa, 3928 ConjunctsInUnsatCore, 164 InterpolantComputations, 2 PerfectInterpolantSequences, 98726/194010 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-57-22-297.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-57-22-297.csv Completed graceful shutdown