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.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:36:23,426 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:36:23,429 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:36:23,441 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:36:23,441 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:36:23,442 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:36:23,443 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:36:23,445 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:36:23,447 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:36:23,448 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:36:23,448 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 19:36:23,473 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:36:23,494 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:36:23,494 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:36:23,495 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:36:23,495 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:36:23,496 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:36:23,496 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:36:23,499 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:36:23,499 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:36:23,499 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:36:23,499 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:36:23,500 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:36:23,500 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:36:23,500 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:36:23,500 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:36:23,500 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:36:23,501 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:36:23,501 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:36:23,501 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:36:23,501 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:36:23,503 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:36:23,503 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:36:23,503 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:36:23,503 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:36:23,503 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:36:23,504 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:36:23,504 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:36:23,504 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:36:23,504 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:36:23,504 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:36:23,505 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:36:23,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:36:23,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:36:23,578 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:36:23,580 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:36:23,580 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:36:23,581 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl [2018-09-23 19:36:23,581 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array3.i_4.bpl' [2018-09-23 19:36:23,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:36:23,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:36:23,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:36:23,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:36:23,656 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:36:23,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:36:23,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:36:23,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:36:23,705 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:36:23,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/1) ... [2018-09-23 19:36:23,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:36:23,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:36:23,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:36:23,731 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:36:23,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (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 [2018-09-23 19:36:23,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:36:23,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:36:24,056 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:36:24,057 INFO L202 PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:36:24 BoogieIcfgContainer [2018-09-23 19:36:24,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:36:24,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:36:24,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:36:24,062 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:36:24,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:36:23" (1/2) ... [2018-09-23 19:36:24,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e969564 and model type array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:36:24, skipping insertion in model container [2018-09-23 19:36:24,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:36:24" (2/2) ... [2018-09-23 19:36:24,065 INFO L112 eAbstractionObserver]: Analyzing ICFG array3.i_4.bpl [2018-09-23 19:36:24,076 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:36:24,084 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:36:24,140 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:36:24,141 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:36:24,141 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:36:24,141 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:36:24,141 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:36:24,142 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:36:24,142 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:36:24,142 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:36:24,142 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:36:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-23 19:36:24,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:36:24,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:24,163 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-23 19:36:24,164 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:24,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:24,171 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-09-23 19:36:24,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:24,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:24,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:24,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:36:24,320 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:36:24,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:36:24,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:36:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:36:24,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:36:24,338 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2018-09-23 19:36:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:24,443 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-23 19:36:24,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:36:24,449 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2018-09-23 19:36:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:24,476 INFO L225 Difference]: With dead ends: 17 [2018-09-23 19:36:24,476 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 19:36:24,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:36:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 19:36:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 19:36:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 19:36:24,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-23 19:36:24,537 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2018-09-23 19:36:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:24,537 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-23 19:36:24,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:36:24,538 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-23 19:36:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:36:24,538 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:24,538 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:36:24,539 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:24,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:24,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-09-23 19:36:24,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:24,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:24,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:24,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:36:24,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:24,589 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 [2018-09-23 19:36:24,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:24,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:24,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:36:24,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:24,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 19:36:24,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:36:24,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:36:24,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:36:24,680 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2018-09-23 19:36:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:24,740 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-23 19:36:24,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:36:24,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-09-23 19:36:24,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:24,745 INFO L225 Difference]: With dead ends: 21 [2018-09-23 19:36:24,745 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 19:36:24,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:36:24,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 19:36:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 19:36:24,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 19:36:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-23 19:36:24,756 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-09-23 19:36:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:24,756 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-23 19:36:24,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:36:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-23 19:36:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 19:36:24,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:24,757 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-23 19:36:24,758 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:24,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:24,758 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 2 times [2018-09-23 19:36:24,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:24,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:24,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:24,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 19:36:24,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:24,873 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 [2018-09-23 19:36:24,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:24,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:24,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:24,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 19:36:24,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:24,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:36:24,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:36:24,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:36:24,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:36:24,961 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-09-23 19:36:25,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:25,053 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-09-23 19:36:25,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 19:36:25,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-09-23 19:36:25,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:25,055 INFO L225 Difference]: With dead ends: 27 [2018-09-23 19:36:25,055 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 19:36:25,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:36:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 19:36:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 19:36:25,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 19:36:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-23 19:36:25,063 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-09-23 19:36:25,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:25,064 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-23 19:36:25,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:36:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-23 19:36:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:36:25,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:25,066 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-23 19:36:25,066 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:25,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:25,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 3 times [2018-09-23 19:36:25,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:25,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:25,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:25,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-23 19:36:25,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:25,252 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 [2018-09-23 19:36:25,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:25,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 19:36:25,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:25,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-09-23 19:36:25,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:25,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 19:36:25,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:36:25,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:36:25,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:36:25,358 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2018-09-23 19:36:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:25,555 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-09-23 19:36:25,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:36:25,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-09-23 19:36:25,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:25,556 INFO L225 Difference]: With dead ends: 33 [2018-09-23 19:36:25,556 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 19:36:25,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:36:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 19:36:25,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 19:36:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 19:36:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-23 19:36:25,563 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2018-09-23 19:36:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:25,564 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-23 19:36:25,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:36:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-23 19:36:25,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 19:36:25,565 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:25,565 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-23 19:36:25,566 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:25,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:25,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 4 times [2018-09-23 19:36:25,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:25,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:25,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:25,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-23 19:36:25,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:25,715 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 [2018-09-23 19:36:25,723 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:25,764 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:25,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:25,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-23 19:36:25,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:25,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:36:25,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:36:25,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:36:25,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:36:25,800 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2018-09-23 19:36:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:25,850 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-09-23 19:36:25,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:36:25,852 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-09-23 19:36:25,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:25,853 INFO L225 Difference]: With dead ends: 39 [2018-09-23 19:36:25,853 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 19:36:25,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:36:25,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 19:36:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 19:36:25,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 19:36:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-23 19:36:25,860 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 22 [2018-09-23 19:36:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:25,860 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-23 19:36:25,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:36:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-23 19:36:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 19:36:25,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:25,861 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-23 19:36:25,862 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:25,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 5 times [2018-09-23 19:36:25,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:25,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:25,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:25,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-23 19:36:26,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:26,068 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 [2018-09-23 19:36:26,079 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:26,118 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 19:36:26,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:26,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-09-23 19:36:26,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:26,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:36:26,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:36:26,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:36:26,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:36:26,156 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2018-09-23 19:36:26,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:26,216 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-09-23 19:36:26,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 19:36:26,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-23 19:36:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:26,217 INFO L225 Difference]: With dead ends: 45 [2018-09-23 19:36:26,218 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:36:26,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:36:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:36:26,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 19:36:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 19:36:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-23 19:36:26,224 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2018-09-23 19:36:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:26,224 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-23 19:36:26,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:36:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-23 19:36:26,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 19:36:26,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:26,226 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-23 19:36:26,226 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:26,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 6 times [2018-09-23 19:36:26,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:26,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:26,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:26,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-09-23 19:36:26,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:26,358 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 [2018-09-23 19:36:26,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:26,452 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 19:36:26,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:26,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:26,465 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-09-23 19:36:26,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:26,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 19:36:26,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:36:26,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:36:26,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:36:26,495 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2018-09-23 19:36:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:26,584 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2018-09-23 19:36:26,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:36:26,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2018-09-23 19:36:26,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:26,587 INFO L225 Difference]: With dead ends: 51 [2018-09-23 19:36:26,587 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 19:36:26,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:36:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 19:36:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 19:36:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 19:36:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-23 19:36:26,594 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2018-09-23 19:36:26,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:26,594 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-23 19:36:26,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:36:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-23 19:36:26,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 19:36:26,595 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:26,595 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-23 19:36:26,596 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:26,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:26,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 7 times [2018-09-23 19:36:26,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:26,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:26,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:26,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-23 19:36:27,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:27,109 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 [2018-09-23 19:36:27,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:27,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2018-09-23 19:36:27,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:27,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:36:27,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:36:27,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:36:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:36:27,204 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2018-09-23 19:36:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:27,285 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2018-09-23 19:36:27,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:36:27,289 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2018-09-23 19:36:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:27,290 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:36:27,290 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 19:36:27,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:36:27,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 19:36:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 19:36:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 19:36:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-23 19:36:27,302 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2018-09-23 19:36:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:27,303 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-23 19:36:27,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:36:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-23 19:36:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 19:36:27,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:27,304 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-23 19:36:27,307 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:27,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:27,307 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 8 times [2018-09-23 19:36:27,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:27,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:27,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:27,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:27,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-23 19:36:27,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:27,895 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 [2018-09-23 19:36:27,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:27,929 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:27,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:27,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2018-09-23 19:36:27,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:27,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:36:27,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:36:27,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:36:27,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:36:27,966 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 11 states. [2018-09-23 19:36:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:28,056 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2018-09-23 19:36:28,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:36:28,057 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2018-09-23 19:36:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:28,057 INFO L225 Difference]: With dead ends: 63 [2018-09-23 19:36:28,058 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:36:28,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:36:28,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:36:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 19:36:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 19:36:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-23 19:36:28,064 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2018-09-23 19:36:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:28,065 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-23 19:36:28,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:36:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-23 19:36:28,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 19:36:28,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:28,066 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-23 19:36:28,067 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:28,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:28,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 9 times [2018-09-23 19:36:28,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:28,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:28,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:28,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:28,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-09-23 19:36:28,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:28,250 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 [2018-09-23 19:36:28,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:28,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 19:36:28,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:28,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2018-09-23 19:36:28,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:28,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:36:28,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:36:28,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:36:28,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:36:28,471 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2018-09-23 19:36:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:28,620 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2018-09-23 19:36:28,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:36:28,622 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2018-09-23 19:36:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:28,623 INFO L225 Difference]: With dead ends: 69 [2018-09-23 19:36:28,623 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:36:28,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:36:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:36:28,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 19:36:28,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 19:36:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-23 19:36:28,629 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 42 [2018-09-23 19:36:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:28,630 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-23 19:36:28,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:36:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-23 19:36:28,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 19:36:28,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:28,632 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-23 19:36:28,632 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:28,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:28,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 10 times [2018-09-23 19:36:28,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:28,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:28,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:28,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:28,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-09-23 19:36:28,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:28,883 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 [2018-09-23 19:36:28,890 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:28,923 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:28,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:28,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2018-09-23 19:36:28,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:28,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:36:28,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:36:28,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:36:28,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:36:28,965 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 13 states. [2018-09-23 19:36:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:29,039 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-09-23 19:36:29,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:36:29,039 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-09-23 19:36:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:29,041 INFO L225 Difference]: With dead ends: 75 [2018-09-23 19:36:29,041 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 19:36:29,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:36:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 19:36:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 19:36:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:36:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-23 19:36:29,048 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 46 [2018-09-23 19:36:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:29,049 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-23 19:36:29,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:36:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-23 19:36:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 19:36:29,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:29,050 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-23 19:36:29,051 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:29,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:29,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 11 times [2018-09-23 19:36:29,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:29,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:29,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:29,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-09-23 19:36:29,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:29,235 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 [2018-09-23 19:36:29,245 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:29,294 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 19:36:29,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:29,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2018-09-23 19:36:29,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:29,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:36:29,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:36:29,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:36:29,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:36:29,333 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 14 states. [2018-09-23 19:36:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:29,416 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2018-09-23 19:36:29,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:36:29,416 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2018-09-23 19:36:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:29,417 INFO L225 Difference]: With dead ends: 81 [2018-09-23 19:36:29,417 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:36:29,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:36:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:36:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 19:36:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 19:36:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-23 19:36:29,425 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2018-09-23 19:36:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:29,425 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-23 19:36:29,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:36:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-23 19:36:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 19:36:29,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:29,428 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-23 19:36:29,428 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:29,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:29,428 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 12 times [2018-09-23 19:36:29,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:29,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:29,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:29,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-09-23 19:36:29,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:29,668 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 [2018-09-23 19:36:29,675 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:29,731 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 19:36:29,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:29,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-09-23 19:36:29,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:29,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:36:29,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:36:29,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:36:29,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:36:29,776 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 15 states. [2018-09-23 19:36:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:29,888 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2018-09-23 19:36:29,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:36:29,888 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2018-09-23 19:36:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:29,890 INFO L225 Difference]: With dead ends: 87 [2018-09-23 19:36:29,890 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 19:36:29,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:36:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 19:36:29,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 19:36:29,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 19:36:29,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-23 19:36:29,898 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2018-09-23 19:36:29,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:29,899 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-23 19:36:29,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:36:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-23 19:36:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 19:36:29,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:29,900 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-23 19:36:29,900 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:29,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:29,901 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 13 times [2018-09-23 19:36:29,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:29,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:29,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:29,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:29,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-09-23 19:36:30,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:30,142 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 [2018-09-23 19:36:30,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:30,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2018-09-23 19:36:30,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:30,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:36:30,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:36:30,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:36:30,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:36:30,240 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 16 states. [2018-09-23 19:36:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:30,463 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2018-09-23 19:36:30,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:36:30,464 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2018-09-23 19:36:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:30,464 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:36:30,464 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:36:30,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:36:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:36:30,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 19:36:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 19:36:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-23 19:36:30,472 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 58 [2018-09-23 19:36:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:30,473 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-23 19:36:30,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:36:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-23 19:36:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 19:36:30,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:30,474 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-23 19:36:30,474 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:30,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 14 times [2018-09-23 19:36:30,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:30,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:30,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:30,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:30,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-23 19:36:30,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:30,780 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 [2018-09-23 19:36:30,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:30,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:30,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:30,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-09-23 19:36:30,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:30,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:36:30,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:36:30,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:36:30,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:36:30,877 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 17 states. [2018-09-23 19:36:30,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:30,951 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2018-09-23 19:36:30,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:36:30,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2018-09-23 19:36:30,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:30,953 INFO L225 Difference]: With dead ends: 99 [2018-09-23 19:36:30,953 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 19:36:30,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:36:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 19:36:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 19:36:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 19:36:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-23 19:36:30,960 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2018-09-23 19:36:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:30,961 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-23 19:36:30,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:36:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-23 19:36:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 19:36:30,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:30,962 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-23 19:36:30,962 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:30,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:30,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 15 times [2018-09-23 19:36:30,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:30,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:30,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:30,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:30,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-09-23 19:36:31,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:31,581 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 [2018-09-23 19:36:31,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:31,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 19:36:31,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:31,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2018-09-23 19:36:31,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:31,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:36:31,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:36:31,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:36:31,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:36:31,712 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 18 states. [2018-09-23 19:36:32,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:32,262 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-09-23 19:36:32,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:36:32,262 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 66 [2018-09-23 19:36:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:32,263 INFO L225 Difference]: With dead ends: 105 [2018-09-23 19:36:32,263 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 19:36:32,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:36:32,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 19:36:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 19:36:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 19:36:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-23 19:36:32,268 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2018-09-23 19:36:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:32,268 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-23 19:36:32,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:36:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-23 19:36:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 19:36:32,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:32,270 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-23 19:36:32,270 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:32,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:32,270 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 16 times [2018-09-23 19:36:32,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:32,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:32,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:32,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:32,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-09-23 19:36:33,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:33,071 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 [2018-09-23 19:36:33,079 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:33,109 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:33,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:33,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2018-09-23 19:36:33,147 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:33,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:36:33,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:36:33,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:36:33,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:36:33,148 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 19 states. [2018-09-23 19:36:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:33,314 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2018-09-23 19:36:33,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:36:33,315 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2018-09-23 19:36:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:33,316 INFO L225 Difference]: With dead ends: 111 [2018-09-23 19:36:33,316 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 19:36:33,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:36:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 19:36:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 19:36:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 19:36:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-23 19:36:33,323 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 70 [2018-09-23 19:36:33,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:33,323 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-23 19:36:33,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:36:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-23 19:36:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 19:36:33,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:33,324 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-23 19:36:33,324 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:33,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 17 times [2018-09-23 19:36:33,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:33,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:33,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:33,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:33,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:33,619 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-09-23 19:36:33,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:33,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:33,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:33,697 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 19:36:33,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:33,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2018-09-23 19:36:33,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:33,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:36:33,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:36:33,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:36:33,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:36:33,745 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 20 states. [2018-09-23 19:36:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:33,864 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2018-09-23 19:36:33,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:36:33,865 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2018-09-23 19:36:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:33,866 INFO L225 Difference]: With dead ends: 117 [2018-09-23 19:36:33,866 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 19:36:33,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:36:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 19:36:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 19:36:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 19:36:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-23 19:36:33,873 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2018-09-23 19:36:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:33,874 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-23 19:36:33,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:36:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-23 19:36:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 19:36:33,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:33,875 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-23 19:36:33,875 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:33,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:33,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 18 times [2018-09-23 19:36:33,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:33,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:33,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:33,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:33,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-09-23 19:36:34,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:34,201 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 [2018-09-23 19:36:34,208 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:34,279 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 19:36:34,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:34,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2018-09-23 19:36:34,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:34,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:36:34,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:36:34,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:36:34,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:36:34,320 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 21 states. [2018-09-23 19:36:34,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:34,446 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2018-09-23 19:36:34,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:36:34,447 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 78 [2018-09-23 19:36:34,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:34,448 INFO L225 Difference]: With dead ends: 123 [2018-09-23 19:36:34,448 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 19:36:34,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:36:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 19:36:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 19:36:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 19:36:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-23 19:36:34,453 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 78 [2018-09-23 19:36:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:34,454 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-23 19:36:34,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:36:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-23 19:36:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 19:36:34,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:34,455 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-23 19:36:34,455 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:34,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 19 times [2018-09-23 19:36:34,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:34,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:34,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:34,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:34,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-09-23 19:36:34,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:34,773 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 [2018-09-23 19:36:34,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:34,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2018-09-23 19:36:34,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:34,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:36:34,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:36:34,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:36:34,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:36:34,862 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 22 states. [2018-09-23 19:36:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:34,981 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2018-09-23 19:36:34,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:36:34,982 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2018-09-23 19:36:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:34,983 INFO L225 Difference]: With dead ends: 129 [2018-09-23 19:36:34,984 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 19:36:34,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:36:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 19:36:34,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 19:36:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 19:36:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-23 19:36:34,990 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 82 [2018-09-23 19:36:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:34,991 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-23 19:36:34,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:36:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-23 19:36:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 19:36:34,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:34,992 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-23 19:36:34,993 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:34,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 20 times [2018-09-23 19:36:34,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:34,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:34,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:34,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:34,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-09-23 19:36:35,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:35,385 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 [2018-09-23 19:36:35,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:35,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:35,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:35,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2018-09-23 19:36:35,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:35,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:36:35,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:36:35,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:36:35,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:36:35,499 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 23 states. [2018-09-23 19:36:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:35,651 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-09-23 19:36:35,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:36:35,651 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2018-09-23 19:36:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:35,652 INFO L225 Difference]: With dead ends: 135 [2018-09-23 19:36:35,653 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 19:36:35,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:36:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 19:36:35,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 19:36:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 19:36:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-23 19:36:35,657 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2018-09-23 19:36:35,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:35,657 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-23 19:36:35,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:36:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-23 19:36:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 19:36:35,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:35,659 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-23 19:36:35,659 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:35,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:35,659 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 21 times [2018-09-23 19:36:35,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:35,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:35,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:35,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:35,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-09-23 19:36:36,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:36,312 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 [2018-09-23 19:36:36,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:36,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 19:36:36,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:36,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2018-09-23 19:36:36,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:36,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:36:36,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:36:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:36:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:36:36,455 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 24 states. [2018-09-23 19:36:36,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:36,640 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2018-09-23 19:36:36,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:36:36,642 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2018-09-23 19:36:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:36,643 INFO L225 Difference]: With dead ends: 141 [2018-09-23 19:36:36,643 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 19:36:36,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:36:36,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 19:36:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 19:36:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 19:36:36,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-23 19:36:36,647 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 90 [2018-09-23 19:36:36,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:36,647 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-23 19:36:36,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:36:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-23 19:36:36,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 19:36:36,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:36,648 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-23 19:36:36,649 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:36,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:36,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 22 times [2018-09-23 19:36:36,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:36,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:36,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:36,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:36,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-09-23 19:36:36,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:36,998 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 [2018-09-23 19:36:37,006 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:37,047 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:37,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:37,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2018-09-23 19:36:37,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:37,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:36:37,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:36:37,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:36:37,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:36:37,093 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 25 states. [2018-09-23 19:36:37,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:37,189 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2018-09-23 19:36:37,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:36:37,189 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 94 [2018-09-23 19:36:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:37,191 INFO L225 Difference]: With dead ends: 147 [2018-09-23 19:36:37,191 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:36:37,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:36:37,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:36:37,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 19:36:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 19:36:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-23 19:36:37,196 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 94 [2018-09-23 19:36:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:37,196 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-23 19:36:37,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:36:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-23 19:36:37,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 19:36:37,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:37,197 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-23 19:36:37,197 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:37,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:37,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 23 times [2018-09-23 19:36:37,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:37,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:37,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:37,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:37,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-09-23 19:36:38,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:38,093 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 [2018-09-23 19:36:38,106 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:38,275 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 19:36:38,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:38,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2018-09-23 19:36:38,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:38,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:36:38,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:36:38,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:36:38,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:36:38,323 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 26 states. [2018-09-23 19:36:38,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:38,423 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2018-09-23 19:36:38,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:36:38,423 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2018-09-23 19:36:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:38,425 INFO L225 Difference]: With dead ends: 153 [2018-09-23 19:36:38,425 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 19:36:38,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:36:38,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 19:36:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 19:36:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 19:36:38,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-23 19:36:38,431 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2018-09-23 19:36:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:38,431 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-23 19:36:38,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:36:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-23 19:36:38,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 19:36:38,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:38,432 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-23 19:36:38,432 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:38,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:38,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 24 times [2018-09-23 19:36:38,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:38,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:38,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:38,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:38,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-09-23 19:36:39,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:39,281 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 [2018-09-23 19:36:39,291 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:39,434 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 19:36:39,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:39,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2018-09-23 19:36:39,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:39,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:36:39,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:36:39,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:36:39,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:36:39,487 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 27 states. [2018-09-23 19:36:39,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:39,703 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2018-09-23 19:36:39,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:36:39,704 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2018-09-23 19:36:39,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:39,705 INFO L225 Difference]: With dead ends: 159 [2018-09-23 19:36:39,705 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 19:36:39,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:36:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 19:36:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 19:36:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:36:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-23 19:36:39,710 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 102 [2018-09-23 19:36:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:39,711 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-23 19:36:39,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:36:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-23 19:36:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 19:36:39,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:39,712 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-23 19:36:39,712 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:39,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:39,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 25 times [2018-09-23 19:36:39,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:39,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:39,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:39,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:39,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-09-23 19:36:40,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:40,524 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 [2018-09-23 19:36:40,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:40,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2018-09-23 19:36:40,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:40,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:36:40,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:36:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:36:40,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:36:40,647 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 28 states. [2018-09-23 19:36:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:40,782 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-09-23 19:36:40,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:36:40,783 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2018-09-23 19:36:40,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:40,784 INFO L225 Difference]: With dead ends: 165 [2018-09-23 19:36:40,784 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:36:40,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:36:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:36:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 19:36:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 19:36:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-23 19:36:40,790 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 106 [2018-09-23 19:36:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:40,791 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-23 19:36:40,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:36:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-23 19:36:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 19:36:40,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:40,792 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-23 19:36:40,792 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:40,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:40,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 26 times [2018-09-23 19:36:40,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:40,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:40,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:40,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:40,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-09-23 19:36:41,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:41,969 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 [2018-09-23 19:36:41,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:42,023 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:42,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:42,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2018-09-23 19:36:42,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:42,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:36:42,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:36:42,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:36:42,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:36:42,067 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 29 states. [2018-09-23 19:36:42,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:42,303 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2018-09-23 19:36:42,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:36:42,304 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 110 [2018-09-23 19:36:42,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:42,305 INFO L225 Difference]: With dead ends: 171 [2018-09-23 19:36:42,305 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 19:36:42,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:36:42,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 19:36:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 19:36:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 19:36:42,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-23 19:36:42,310 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2018-09-23 19:36:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:42,311 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-23 19:36:42,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:36:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-23 19:36:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 19:36:42,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:42,312 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-23 19:36:42,312 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:42,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 27 times [2018-09-23 19:36:42,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:42,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:42,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:42,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:42,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-09-23 19:36:42,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:42,986 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 [2018-09-23 19:36:43,000 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:43,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 19:36:43,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:43,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2018-09-23 19:36:43,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:43,231 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:36:43,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:36:43,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:36:43,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:36:43,232 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 30 states. [2018-09-23 19:36:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:43,344 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2018-09-23 19:36:43,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:36:43,344 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 114 [2018-09-23 19:36:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:43,345 INFO L225 Difference]: With dead ends: 177 [2018-09-23 19:36:43,346 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 19:36:43,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:36:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 19:36:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 19:36:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 19:36:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-23 19:36:43,350 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 114 [2018-09-23 19:36:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:43,350 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-23 19:36:43,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:36:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-23 19:36:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 19:36:43,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:43,351 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-23 19:36:43,351 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:43,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 28 times [2018-09-23 19:36:43,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:43,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:43,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:43,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:43,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-09-23 19:36:43,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:43,828 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 [2018-09-23 19:36:43,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:43,906 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:43,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:43,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2018-09-23 19:36:43,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:43,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:36:43,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:36:43,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:36:43,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:36:43,963 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 31 states. [2018-09-23 19:36:44,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:44,170 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2018-09-23 19:36:44,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:36:44,171 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 118 [2018-09-23 19:36:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:44,172 INFO L225 Difference]: With dead ends: 183 [2018-09-23 19:36:44,172 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:36:44,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:36:44,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:36:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-23 19:36:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 19:36:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-23 19:36:44,178 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 118 [2018-09-23 19:36:44,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:44,178 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-23 19:36:44,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:36:44,178 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-23 19:36:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 19:36:44,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:44,179 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-23 19:36:44,179 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:44,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:44,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 29 times [2018-09-23 19:36:44,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:44,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:44,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:44,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:44,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-09-23 19:36:44,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:44,623 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 [2018-09-23 19:36:44,631 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:44,886 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 19:36:44,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:44,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2018-09-23 19:36:44,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:44,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:36:44,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:36:44,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:36:44,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:36:44,930 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 32 states. [2018-09-23 19:36:45,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:45,065 INFO L93 Difference]: Finished difference Result 189 states and 192 transitions. [2018-09-23 19:36:45,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:36:45,065 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2018-09-23 19:36:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:45,069 INFO L225 Difference]: With dead ends: 189 [2018-09-23 19:36:45,069 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 19:36:45,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:36:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 19:36:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-23 19:36:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 19:36:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-23 19:36:45,074 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2018-09-23 19:36:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:45,074 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-23 19:36:45,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:36:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-23 19:36:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 19:36:45,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:45,075 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-23 19:36:45,076 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:45,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 30 times [2018-09-23 19:36:45,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:45,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:45,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:45,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:45,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-09-23 19:36:45,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:45,618 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 [2018-09-23 19:36:45,628 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:45,813 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 19:36:45,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:45,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-09-23 19:36:45,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:45,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:36:45,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:36:45,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:36:45,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:36:45,878 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 33 states. [2018-09-23 19:36:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:46,026 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-09-23 19:36:46,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:36:46,027 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 126 [2018-09-23 19:36:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:46,028 INFO L225 Difference]: With dead ends: 195 [2018-09-23 19:36:46,028 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 19:36:46,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:36:46,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 19:36:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 19:36:46,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 19:36:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-23 19:36:46,034 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 126 [2018-09-23 19:36:46,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:46,034 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-23 19:36:46,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:36:46,034 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-23 19:36:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 19:36:46,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:46,035 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-23 19:36:46,035 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:46,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:46,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 31 times [2018-09-23 19:36:46,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:46,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:46,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:46,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:46,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-09-23 19:36:46,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:46,842 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 [2018-09-23 19:36:46,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:46,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2018-09-23 19:36:46,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:46,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:36:46,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:36:46,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:36:46,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:36:46,959 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 34 states. [2018-09-23 19:36:48,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:48,070 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2018-09-23 19:36:48,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:36:48,071 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 130 [2018-09-23 19:36:48,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:48,071 INFO L225 Difference]: With dead ends: 201 [2018-09-23 19:36:48,072 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 19:36:48,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:36:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 19:36:48,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-23 19:36:48,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 19:36:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-23 19:36:48,076 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2018-09-23 19:36:48,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:48,076 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-23 19:36:48,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:36:48,077 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-23 19:36:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 19:36:48,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:48,077 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-23 19:36:48,077 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:48,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:48,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 32 times [2018-09-23 19:36:48,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:48,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:48,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:48,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:48,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-09-23 19:36:48,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:48,690 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 [2018-09-23 19:36:48,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:48,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:48,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:48,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2018-09-23 19:36:48,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:48,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:36:48,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:36:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:36:48,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:36:48,803 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 35 states. [2018-09-23 19:36:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:48,960 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2018-09-23 19:36:48,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:36:48,960 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2018-09-23 19:36:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:48,962 INFO L225 Difference]: With dead ends: 207 [2018-09-23 19:36:48,962 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 19:36:48,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:36:48,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 19:36:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 19:36:48,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 19:36:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-23 19:36:48,968 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2018-09-23 19:36:48,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:48,968 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-23 19:36:48,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:36:48,968 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-23 19:36:48,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 19:36:48,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:48,969 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-23 19:36:48,970 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:48,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:48,970 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 33 times [2018-09-23 19:36:48,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:48,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:48,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:48,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:48,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-09-23 19:36:49,747 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:49,747 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 [2018-09-23 19:36:49,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:50,067 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 19:36:50,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:50,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2018-09-23 19:36:50,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:50,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:36:50,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:36:50,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:36:50,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:36:50,128 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 36 states. [2018-09-23 19:36:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:50,289 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2018-09-23 19:36:50,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:36:50,290 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 138 [2018-09-23 19:36:50,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:50,291 INFO L225 Difference]: With dead ends: 213 [2018-09-23 19:36:50,291 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 19:36:50,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:36:50,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 19:36:50,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-23 19:36:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 19:36:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-23 19:36:50,297 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 138 [2018-09-23 19:36:50,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:50,297 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-23 19:36:50,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:36:50,297 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-23 19:36:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 19:36:50,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:50,298 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-23 19:36:50,298 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:50,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:50,299 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 34 times [2018-09-23 19:36:50,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:50,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:50,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:50,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:50,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-09-23 19:36:51,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:51,388 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 [2018-09-23 19:36:51,395 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:51,459 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:51,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:51,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2018-09-23 19:36:51,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:51,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:36:51,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:36:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:36:51,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:36:51,515 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 37 states. [2018-09-23 19:36:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:51,738 INFO L93 Difference]: Finished difference Result 219 states and 222 transitions. [2018-09-23 19:36:51,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:36:51,738 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 142 [2018-09-23 19:36:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:51,739 INFO L225 Difference]: With dead ends: 219 [2018-09-23 19:36:51,739 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 19:36:51,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:36:51,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 19:36:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-23 19:36:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 19:36:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-23 19:36:51,744 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 142 [2018-09-23 19:36:51,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:51,744 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-23 19:36:51,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:36:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-23 19:36:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 19:36:51,745 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:51,745 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-23 19:36:51,746 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:51,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:51,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 35 times [2018-09-23 19:36:51,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:51,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:51,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:51,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:51,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-09-23 19:36:53,265 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:53,266 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 [2018-09-23 19:36:53,274 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:53,832 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 19:36:53,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:53,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2018-09-23 19:36:53,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:53,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:36:53,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:36:53,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:36:53,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:36:53,886 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 38 states. [2018-09-23 19:36:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:54,119 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-09-23 19:36:54,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:36:54,119 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2018-09-23 19:36:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:54,121 INFO L225 Difference]: With dead ends: 225 [2018-09-23 19:36:54,121 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 19:36:54,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:36:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 19:36:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-23 19:36:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 19:36:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-09-23 19:36:54,127 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2018-09-23 19:36:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:54,128 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-09-23 19:36:54,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:36:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-09-23 19:36:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-23 19:36:54,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:54,129 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-09-23 19:36:54,129 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:54,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:54,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 36 times [2018-09-23 19:36:54,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:54,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:54,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:54,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:54,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-09-23 19:36:55,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:55,888 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 [2018-09-23 19:36:55,895 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:56,203 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 19:36:56,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:56,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2018-09-23 19:36:56,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:56,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:36:56,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:36:56,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:36:56,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:36:56,262 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 39 states. [2018-09-23 19:36:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:56,541 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2018-09-23 19:36:56,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:36:56,541 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 150 [2018-09-23 19:36:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:56,542 INFO L225 Difference]: With dead ends: 231 [2018-09-23 19:36:56,543 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 19:36:56,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:36:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 19:36:56,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-23 19:36:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 19:36:56,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-23 19:36:56,548 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 150 [2018-09-23 19:36:56,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:56,548 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-23 19:36:56,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:36:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-23 19:36:56,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 19:36:56,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:56,549 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-23 19:36:56,549 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:56,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:56,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 37 times [2018-09-23 19:36:56,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:56,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:56,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:56,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:56,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-09-23 19:36:57,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:57,419 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:36:57,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:57,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2018-09-23 19:36:57,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:57,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:36:57,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:36:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:36:57,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:36:57,554 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 40 states. [2018-09-23 19:36:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:58,093 INFO L93 Difference]: Finished difference Result 237 states and 240 transitions. [2018-09-23 19:36:58,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:36:58,093 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 154 [2018-09-23 19:36:58,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:58,094 INFO L225 Difference]: With dead ends: 237 [2018-09-23 19:36:58,094 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 19:36:58,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:36:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 19:36:58,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-23 19:36:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 19:36:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-09-23 19:36:58,098 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 154 [2018-09-23 19:36:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:58,099 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-09-23 19:36:58,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:36:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-09-23 19:36:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 19:36:58,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:58,100 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-09-23 19:36:58,100 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:58,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:58,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 38 times [2018-09-23 19:36:58,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:58,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:58,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:58,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:58,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:59,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-09-23 19:36:59,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:59,096 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 [2018-09-23 19:36:59,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:59,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:59,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:59,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2018-09-23 19:36:59,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:59,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:36:59,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:36:59,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:36:59,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:36:59,235 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 41 states. [2018-09-23 19:36:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:59,647 INFO L93 Difference]: Finished difference Result 243 states and 246 transitions. [2018-09-23 19:36:59,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:36:59,648 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 158 [2018-09-23 19:36:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:59,649 INFO L225 Difference]: With dead ends: 243 [2018-09-23 19:36:59,650 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 19:36:59,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:36:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 19:36:59,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-23 19:36:59,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 19:36:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-23 19:36:59,655 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2018-09-23 19:36:59,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:59,655 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-23 19:36:59,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:36:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-23 19:36:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 19:36:59,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:59,657 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-23 19:36:59,657 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:59,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 39 times [2018-09-23 19:36:59,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:59,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:59,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:59,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:59,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-09-23 19:37:00,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:00,455 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 [2018-09-23 19:37:00,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:00,962 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 19:37:00,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:00,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2018-09-23 19:37:01,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:01,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:37:01,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:37:01,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:37:01,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:37:01,030 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 42 states. [2018-09-23 19:37:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:01,258 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2018-09-23 19:37:01,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:37:01,258 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 162 [2018-09-23 19:37:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:01,260 INFO L225 Difference]: With dead ends: 249 [2018-09-23 19:37:01,260 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 19:37:01,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:37:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 19:37:01,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-23 19:37:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 19:37:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-09-23 19:37:01,266 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 162 [2018-09-23 19:37:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:01,266 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-09-23 19:37:01,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:37:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-09-23 19:37:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-23 19:37:01,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:01,267 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-09-23 19:37:01,268 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:01,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:01,268 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 40 times [2018-09-23 19:37:01,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:01,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:01,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:01,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:01,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-09-23 19:37:02,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:02,033 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 [2018-09-23 19:37:02,041 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:02,107 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:02,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:02,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2018-09-23 19:37:02,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:02,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:37:02,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:37:02,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:37:02,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:37:02,172 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 43 states. [2018-09-23 19:37:03,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:03,551 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-09-23 19:37:03,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:37:03,551 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2018-09-23 19:37:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:03,553 INFO L225 Difference]: With dead ends: 255 [2018-09-23 19:37:03,553 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 19:37:03,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:37:03,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 19:37:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-23 19:37:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-23 19:37:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-23 19:37:03,559 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 166 [2018-09-23 19:37:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:03,560 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-23 19:37:03,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:37:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-23 19:37:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 19:37:03,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:03,561 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-23 19:37:03,561 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:03,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:03,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 41 times [2018-09-23 19:37:03,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:03,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:03,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:03,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:03,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-09-23 19:37:05,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:05,526 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 [2018-09-23 19:37:05,542 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:06,341 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 19:37:06,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:06,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2018-09-23 19:37:06,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:06,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:37:06,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:37:06,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:37:06,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:37:06,439 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 44 states. [2018-09-23 19:37:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:06,621 INFO L93 Difference]: Finished difference Result 261 states and 264 transitions. [2018-09-23 19:37:06,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:37:06,621 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 170 [2018-09-23 19:37:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:06,624 INFO L225 Difference]: With dead ends: 261 [2018-09-23 19:37:06,624 INFO L226 Difference]: Without dead ends: 175 [2018-09-23 19:37:06,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:37:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-23 19:37:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-23 19:37:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 19:37:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-09-23 19:37:06,631 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2018-09-23 19:37:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:06,631 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-09-23 19:37:06,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:37:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-09-23 19:37:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-23 19:37:06,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:06,632 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-09-23 19:37:06,633 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:06,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash -903276333, now seen corresponding path program 42 times [2018-09-23 19:37:06,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:06,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:06,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:06,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:06,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-09-23 19:37:07,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:07,552 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 [2018-09-23 19:37:07,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:08,041 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 19:37:08,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:08,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2018-09-23 19:37:08,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:08,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:37:08,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:37:08,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:37:08,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:37:08,114 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 45 states. [2018-09-23 19:37:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:08,433 INFO L93 Difference]: Finished difference Result 267 states and 270 transitions. [2018-09-23 19:37:08,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:37:08,434 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 174 [2018-09-23 19:37:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:08,434 INFO L225 Difference]: With dead ends: 267 [2018-09-23 19:37:08,434 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 19:37:08,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:37:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 19:37:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-23 19:37:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 19:37:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-23 19:37:08,439 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 174 [2018-09-23 19:37:08,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:08,439 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-23 19:37:08,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:37:08,439 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-23 19:37:08,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 19:37:08,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:08,441 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-23 19:37:08,441 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:08,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1945427129, now seen corresponding path program 43 times [2018-09-23 19:37:08,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:08,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:08,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:08,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:08,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-09-23 19:37:09,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:09,974 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 [2018-09-23 19:37:09,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:10,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:10,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2018-09-23 19:37:10,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:10,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:37:10,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:37:10,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:37:10,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:37:10,112 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 46 states. [2018-09-23 19:37:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:10,333 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2018-09-23 19:37:10,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:37:10,334 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 178 [2018-09-23 19:37:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:10,335 INFO L225 Difference]: With dead ends: 273 [2018-09-23 19:37:10,336 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 19:37:10,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:37:10,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 19:37:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-23 19:37:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-23 19:37:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-09-23 19:37:10,340 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 178 [2018-09-23 19:37:10,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:10,341 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-09-23 19:37:10,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:37:10,341 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-09-23 19:37:10,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 19:37:10,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:10,342 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-09-23 19:37:10,342 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:10,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:10,343 INFO L82 PathProgramCache]: Analyzing trace with hash -45190213, now seen corresponding path program 44 times [2018-09-23 19:37:10,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:10,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:10,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:10,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:10,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-23 19:37:11,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:11,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:37:11,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:11,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:11,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:11,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-23 19:37:12,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:12,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:37:12,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:37:12,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:37:12,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:37:12,048 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 47 states. [2018-09-23 19:37:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:12,240 INFO L93 Difference]: Finished difference Result 279 states and 282 transitions. [2018-09-23 19:37:12,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:37:12,241 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 182 [2018-09-23 19:37:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:12,242 INFO L225 Difference]: With dead ends: 279 [2018-09-23 19:37:12,242 INFO L226 Difference]: Without dead ends: 187 [2018-09-23 19:37:12,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:37:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-23 19:37:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-23 19:37:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-23 19:37:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-23 19:37:12,248 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 182 [2018-09-23 19:37:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:12,248 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-23 19:37:12,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:37:12,248 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-23 19:37:12,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-23 19:37:12,249 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:12,250 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-23 19:37:12,250 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:12,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:12,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1769474607, now seen corresponding path program 45 times [2018-09-23 19:37:12,250 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:12,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:12,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:12,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:12,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-09-23 19:37:13,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:13,406 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 [2018-09-23 19:37:13,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:14,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 19:37:14,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:14,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2018-09-23 19:37:14,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:14,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:37:14,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:37:14,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:37:14,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:37:14,412 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 48 states. [2018-09-23 19:37:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:14,684 INFO L93 Difference]: Finished difference Result 285 states and 288 transitions. [2018-09-23 19:37:14,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:37:14,685 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 186 [2018-09-23 19:37:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:14,686 INFO L225 Difference]: With dead ends: 285 [2018-09-23 19:37:14,687 INFO L226 Difference]: Without dead ends: 191 [2018-09-23 19:37:14,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:37:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-23 19:37:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-23 19:37:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-23 19:37:14,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-09-23 19:37:14,692 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 186 [2018-09-23 19:37:14,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:14,693 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-09-23 19:37:14,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:37:14,693 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-09-23 19:37:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-23 19:37:14,694 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:14,694 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-09-23 19:37:14,694 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:14,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash -879958365, now seen corresponding path program 46 times [2018-09-23 19:37:14,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:14,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:14,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:14,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:14,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-09-23 19:37:16,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:16,025 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 [2018-09-23 19:37:16,032 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:16,107 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:16,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:16,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2018-09-23 19:37:16,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:16,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:37:16,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:37:16,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:37:16,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:37:16,170 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 49 states. [2018-09-23 19:37:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:16,388 INFO L93 Difference]: Finished difference Result 291 states and 294 transitions. [2018-09-23 19:37:16,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:37:16,389 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 190 [2018-09-23 19:37:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:16,390 INFO L225 Difference]: With dead ends: 291 [2018-09-23 19:37:16,390 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 19:37:16,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:37:16,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 19:37:16,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-23 19:37:16,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-23 19:37:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-23 19:37:16,395 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 190 [2018-09-23 19:37:16,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:16,395 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-23 19:37:16,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:37:16,395 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-23 19:37:16,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-23 19:37:16,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:16,396 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-23 19:37:16,396 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:16,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:16,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1911420649, now seen corresponding path program 47 times [2018-09-23 19:37:16,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:16,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:16,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:16,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:16,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:17,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-09-23 19:37:17,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:17,693 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 [2018-09-23 19:37:17,700 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:18,796 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 19:37:18,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:18,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2018-09-23 19:37:18,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:18,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:37:18,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:37:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:37:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:37:18,880 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 50 states. [2018-09-23 19:37:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:19,329 INFO L93 Difference]: Finished difference Result 297 states and 300 transitions. [2018-09-23 19:37:19,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:37:19,329 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 194 [2018-09-23 19:37:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:19,330 INFO L225 Difference]: With dead ends: 297 [2018-09-23 19:37:19,330 INFO L226 Difference]: Without dead ends: 199 [2018-09-23 19:37:19,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:37:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-23 19:37:19,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-23 19:37:19,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 19:37:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-09-23 19:37:19,335 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194 [2018-09-23 19:37:19,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:19,336 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-09-23 19:37:19,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:37:19,336 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-09-23 19:37:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-23 19:37:19,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:19,337 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-09-23 19:37:19,337 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:19,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:19,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1259106699, now seen corresponding path program 48 times [2018-09-23 19:37:19,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:19,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:19,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:19,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:19,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-09-23 19:37:20,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:20,459 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 [2018-09-23 19:37:20,467 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:21,203 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 19:37:21,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:21,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2018-09-23 19:37:21,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:21,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:37:21,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:37:21,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:37:21,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:37:21,264 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 51 states. [2018-09-23 19:37:21,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:21,518 INFO L93 Difference]: Finished difference Result 303 states and 306 transitions. [2018-09-23 19:37:21,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:37:21,519 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 198 [2018-09-23 19:37:21,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:21,520 INFO L225 Difference]: With dead ends: 303 [2018-09-23 19:37:21,520 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 19:37:21,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:37:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 19:37:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-23 19:37:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-23 19:37:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-23 19:37:21,526 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 198 [2018-09-23 19:37:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:21,526 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-23 19:37:21,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:37:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-23 19:37:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-23 19:37:21,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:21,527 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-23 19:37:21,527 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:21,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:21,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1946083329, now seen corresponding path program 49 times [2018-09-23 19:37:21,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:21,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:21,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:21,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:21,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-09-23 19:37:22,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:22,780 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 [2018-09-23 19:37:22,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:22,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2018-09-23 19:37:22,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:22,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:37:22,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:37:22,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:37:22,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:37:22,925 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 52 states. [2018-09-23 19:37:23,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:23,226 INFO L93 Difference]: Finished difference Result 309 states and 312 transitions. [2018-09-23 19:37:23,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:37:23,228 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 202 [2018-09-23 19:37:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:23,229 INFO L225 Difference]: With dead ends: 309 [2018-09-23 19:37:23,229 INFO L226 Difference]: Without dead ends: 207 [2018-09-23 19:37:23,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:37:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-23 19:37:23,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-23 19:37:23,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-23 19:37:23,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-09-23 19:37:23,234 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202 [2018-09-23 19:37:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:23,234 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-09-23 19:37:23,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:37:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-09-23 19:37:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-23 19:37:23,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:23,235 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-09-23 19:37:23,235 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:23,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:23,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1980427149, now seen corresponding path program 50 times [2018-09-23 19:37:23,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:23,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:23,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:23,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:23,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-09-23 19:37:24,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:24,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:37:24,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:24,802 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:24,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:24,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:24,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2018-09-23 19:37:24,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:24,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:37:24,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:37:24,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:37:24,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:37:24,878 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 53 states. [2018-09-23 19:37:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:25,804 INFO L93 Difference]: Finished difference Result 315 states and 318 transitions. [2018-09-23 19:37:25,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:37:25,804 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 206 [2018-09-23 19:37:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:25,806 INFO L225 Difference]: With dead ends: 315 [2018-09-23 19:37:25,806 INFO L226 Difference]: Without dead ends: 211 [2018-09-23 19:37:25,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:37:25,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-23 19:37:25,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-23 19:37:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-23 19:37:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-09-23 19:37:25,812 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 206 [2018-09-23 19:37:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:25,812 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-09-23 19:37:25,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:37:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-09-23 19:37:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-23 19:37:25,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:25,813 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-09-23 19:37:25,814 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:25,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash -311603481, now seen corresponding path program 51 times [2018-09-23 19:37:25,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:25,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:25,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:25,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:25,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-09-23 19:37:27,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:27,106 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 [2018-09-23 19:37:27,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:28,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 19:37:28,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:28,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 2652 trivial. 0 not checked. [2018-09-23 19:37:28,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:28,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:37:28,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:37:28,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:37:28,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:37:28,368 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 54 states. [2018-09-23 19:37:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:28,760 INFO L93 Difference]: Finished difference Result 321 states and 324 transitions. [2018-09-23 19:37:28,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:37:28,760 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 210 [2018-09-23 19:37:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:28,762 INFO L225 Difference]: With dead ends: 321 [2018-09-23 19:37:28,763 INFO L226 Difference]: Without dead ends: 215 [2018-09-23 19:37:28,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:37:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-23 19:37:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-23 19:37:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-23 19:37:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2018-09-23 19:37:28,767 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 210 [2018-09-23 19:37:28,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:28,768 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2018-09-23 19:37:28,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:37:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2018-09-23 19:37:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-23 19:37:28,769 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:28,769 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1] [2018-09-23 19:37:28,769 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:28,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:28,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1905340581, now seen corresponding path program 52 times [2018-09-23 19:37:28,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:28,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:28,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:28,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:28,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-09-23 19:37:29,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:29,976 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 [2018-09-23 19:37:29,983 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:30,074 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:30,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:30,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2018-09-23 19:37:30,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:30,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:37:30,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:37:30,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:37:30,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:37:30,145 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 55 states. [2018-09-23 19:37:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:30,438 INFO L93 Difference]: Finished difference Result 327 states and 330 transitions. [2018-09-23 19:37:30,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:37:30,439 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 214 [2018-09-23 19:37:30,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:30,440 INFO L225 Difference]: With dead ends: 327 [2018-09-23 19:37:30,441 INFO L226 Difference]: Without dead ends: 219 [2018-09-23 19:37:30,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:37:30,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-23 19:37:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-23 19:37:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-23 19:37:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-09-23 19:37:30,447 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 214 [2018-09-23 19:37:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:30,447 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-09-23 19:37:30,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:37:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-09-23 19:37:30,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-23 19:37:30,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:30,449 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-09-23 19:37:30,449 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:30,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash 880711119, now seen corresponding path program 53 times [2018-09-23 19:37:30,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:30,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:30,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:30,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:30,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-09-23 19:37:31,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:31,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:37:31,766 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:33,577 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-23 19:37:33,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:33,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2018-09-23 19:37:33,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:33,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:37:33,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:37:33,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:37:33,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:37:33,642 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 56 states. [2018-09-23 19:37:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:34,009 INFO L93 Difference]: Finished difference Result 333 states and 336 transitions. [2018-09-23 19:37:34,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:37:34,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 218 [2018-09-23 19:37:34,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:34,010 INFO L225 Difference]: With dead ends: 333 [2018-09-23 19:37:34,011 INFO L226 Difference]: Without dead ends: 223 [2018-09-23 19:37:34,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:37:34,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-23 19:37:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-23 19:37:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-23 19:37:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2018-09-23 19:37:34,016 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 218 [2018-09-23 19:37:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:34,016 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2018-09-23 19:37:34,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:37:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2018-09-23 19:37:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-23 19:37:34,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:34,017 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1] [2018-09-23 19:37:34,017 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:34,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1453433411, now seen corresponding path program 54 times [2018-09-23 19:37:34,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:34,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:34,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:34,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:34,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-23 19:37:35,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:35,224 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 [2018-09-23 19:37:35,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:36,127 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 19:37:36,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:36,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-23 19:37:36,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:36,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:37:36,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:37:36,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:37:36,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:37:36,215 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 57 states. [2018-09-23 19:37:36,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:36,611 INFO L93 Difference]: Finished difference Result 339 states and 342 transitions. [2018-09-23 19:37:36,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:37:36,612 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 222 [2018-09-23 19:37:36,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:36,613 INFO L225 Difference]: With dead ends: 339 [2018-09-23 19:37:36,613 INFO L226 Difference]: Without dead ends: 227 [2018-09-23 19:37:36,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:37:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-23 19:37:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-23 19:37:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-23 19:37:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-09-23 19:37:36,618 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 222 [2018-09-23 19:37:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:36,618 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-09-23 19:37:36,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:37:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-09-23 19:37:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-23 19:37:36,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:36,620 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-09-23 19:37:36,620 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:36,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:36,620 INFO L82 PathProgramCache]: Analyzing trace with hash -614665033, now seen corresponding path program 55 times [2018-09-23 19:37:36,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:36,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:36,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:36,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:36,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-23 19:37:37,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:37,917 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 [2018-09-23 19:37:37,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:38,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-23 19:37:38,075 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:38,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:37:38,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:37:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:37:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:37:38,077 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 58 states. [2018-09-23 19:37:38,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:38,375 INFO L93 Difference]: Finished difference Result 345 states and 348 transitions. [2018-09-23 19:37:38,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:37:38,376 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 226 [2018-09-23 19:37:38,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:38,377 INFO L225 Difference]: With dead ends: 345 [2018-09-23 19:37:38,378 INFO L226 Difference]: Without dead ends: 231 [2018-09-23 19:37:38,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:37:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-23 19:37:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-23 19:37:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-23 19:37:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-09-23 19:37:38,384 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 226 [2018-09-23 19:37:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:38,384 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-09-23 19:37:38,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:37:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-09-23 19:37:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-23 19:37:38,385 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:38,385 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1] [2018-09-23 19:37:38,385 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:38,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:38,386 INFO L82 PathProgramCache]: Analyzing trace with hash -659190485, now seen corresponding path program 56 times [2018-09-23 19:37:38,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:38,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:38,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:38,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:38,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-09-23 19:37:40,000 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:40,000 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 [2018-09-23 19:37:40,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:40,109 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:40,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:40,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2018-09-23 19:37:40,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:40,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:37:40,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:37:40,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:37:40,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:37:40,192 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 59 states. [2018-09-23 19:37:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:41,200 INFO L93 Difference]: Finished difference Result 351 states and 354 transitions. [2018-09-23 19:37:41,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:37:41,201 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 230 [2018-09-23 19:37:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:41,202 INFO L225 Difference]: With dead ends: 351 [2018-09-23 19:37:41,203 INFO L226 Difference]: Without dead ends: 235 [2018-09-23 19:37:41,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:37:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-23 19:37:41,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-23 19:37:41,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-23 19:37:41,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-09-23 19:37:41,208 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 230 [2018-09-23 19:37:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:41,208 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-09-23 19:37:41,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:37:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-09-23 19:37:41,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-23 19:37:41,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:41,209 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2018-09-23 19:37:41,209 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:41,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:41,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1412459423, now seen corresponding path program 57 times [2018-09-23 19:37:41,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:41,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:41,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:41,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:41,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-09-23 19:37:42,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:42,699 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 [2018-09-23 19:37:42,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:44,435 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-23 19:37:44,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:44,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2018-09-23 19:37:44,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:44,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 19:37:44,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:37:44,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:37:44,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:37:44,529 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 60 states. [2018-09-23 19:37:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:45,026 INFO L93 Difference]: Finished difference Result 357 states and 360 transitions. [2018-09-23 19:37:45,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:37:45,027 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 234 [2018-09-23 19:37:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:45,028 INFO L225 Difference]: With dead ends: 357 [2018-09-23 19:37:45,029 INFO L226 Difference]: Without dead ends: 239 [2018-09-23 19:37:45,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:37:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-23 19:37:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-23 19:37:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-23 19:37:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 240 transitions. [2018-09-23 19:37:45,033 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 240 transitions. Word has length 234 [2018-09-23 19:37:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:45,033 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 240 transitions. [2018-09-23 19:37:45,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:37:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 240 transitions. [2018-09-23 19:37:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-23 19:37:45,034 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:45,034 INFO L375 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 1, 1, 1, 1] [2018-09-23 19:37:45,035 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:45,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:45,035 INFO L82 PathProgramCache]: Analyzing trace with hash 47353875, now seen corresponding path program 58 times [2018-09-23 19:37:45,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:45,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:45,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:45,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:45,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-09-23 19:37:46,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:46,612 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 [2018-09-23 19:37:46,623 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:46,717 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:46,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:46,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6844 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2018-09-23 19:37:46,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:46,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 19:37:46,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:37:46,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:37:46,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:37:46,778 INFO L87 Difference]: Start difference. First operand 239 states and 240 transitions. Second operand 61 states. [2018-09-23 19:37:47,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:47,155 INFO L93 Difference]: Finished difference Result 363 states and 366 transitions. [2018-09-23 19:37:47,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:37:47,156 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 238 [2018-09-23 19:37:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:47,157 INFO L225 Difference]: With dead ends: 363 [2018-09-23 19:37:47,157 INFO L226 Difference]: Without dead ends: 243 [2018-09-23 19:37:47,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:37:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-23 19:37:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-23 19:37:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-23 19:37:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-09-23 19:37:47,163 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 238 [2018-09-23 19:37:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:47,163 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-09-23 19:37:47,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:37:47,163 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-09-23 19:37:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-23 19:37:47,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:47,164 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2018-09-23 19:37:47,164 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:47,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash 153156231, now seen corresponding path program 59 times [2018-09-23 19:37:47,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:47,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:47,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:47,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:47,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-09-23 19:37:48,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:48,742 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 [2018-09-23 19:37:48,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:51,387 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-23 19:37:51,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:51,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2018-09-23 19:37:51,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:51,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 19:37:51,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:37:51,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:37:51,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:37:51,469 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 62 states. [2018-09-23 19:37:51,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:51,951 INFO L93 Difference]: Finished difference Result 369 states and 372 transitions. [2018-09-23 19:37:51,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:37:51,952 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 242 [2018-09-23 19:37:51,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:51,953 INFO L225 Difference]: With dead ends: 369 [2018-09-23 19:37:51,954 INFO L226 Difference]: Without dead ends: 247 [2018-09-23 19:37:51,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:37:51,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-23 19:37:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-23 19:37:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-23 19:37:51,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2018-09-23 19:37:51,959 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 242 [2018-09-23 19:37:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:51,959 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2018-09-23 19:37:51,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:37:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2018-09-23 19:37:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-23 19:37:51,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:51,961 INFO L375 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 1, 1, 1, 1] [2018-09-23 19:37:51,961 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:51,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:51,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1155486981, now seen corresponding path program 60 times [2018-09-23 19:37:51,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:51,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:51,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:51,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:51,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-09-23 19:37:53,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:53,370 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 [2018-09-23 19:37:53,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:54,877 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-23 19:37:54,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:54,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 3660 trivial. 0 not checked. [2018-09-23 19:37:54,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:54,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 19:37:54,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:37:54,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:37:54,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:37:54,979 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand 63 states. [2018-09-23 19:37:55,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:55,328 INFO L93 Difference]: Finished difference Result 375 states and 378 transitions. [2018-09-23 19:37:55,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:37:55,328 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 246 [2018-09-23 19:37:55,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:55,330 INFO L225 Difference]: With dead ends: 375 [2018-09-23 19:37:55,330 INFO L226 Difference]: Without dead ends: 251 [2018-09-23 19:37:55,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:37:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-23 19:37:55,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-23 19:37:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-23 19:37:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-09-23 19:37:55,335 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 246 [2018-09-23 19:37:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:55,335 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-09-23 19:37:55,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:37:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-09-23 19:37:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-23 19:37:55,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:55,336 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2018-09-23 19:37:55,337 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:55,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1549181295, now seen corresponding path program 61 times [2018-09-23 19:37:55,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:55,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:55,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:55,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:55,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-09-23 19:37:56,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:56,827 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 [2018-09-23 19:37:56,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:56,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2018-09-23 19:37:57,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:57,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 19:37:57,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:37:57,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:37:57,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:37:57,013 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 64 states. [2018-09-23 19:37:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:57,361 INFO L93 Difference]: Finished difference Result 381 states and 384 transitions. [2018-09-23 19:37:57,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:37:57,362 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 250 [2018-09-23 19:37:57,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:57,363 INFO L225 Difference]: With dead ends: 381 [2018-09-23 19:37:57,363 INFO L226 Difference]: Without dead ends: 255 [2018-09-23 19:37:57,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:37:57,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-23 19:37:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-23 19:37:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-23 19:37:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2018-09-23 19:37:57,368 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 250 [2018-09-23 19:37:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:57,368 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2018-09-23 19:37:57,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:37:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2018-09-23 19:37:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-23 19:37:57,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:57,370 INFO L375 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 1, 1, 1, 1] [2018-09-23 19:37:57,370 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:57,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:57,370 INFO L82 PathProgramCache]: Analyzing trace with hash -540549661, now seen corresponding path program 62 times [2018-09-23 19:37:57,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:57,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:57,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:57,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:57,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-09-23 19:37:58,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:58,916 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 [2018-09-23 19:37:58,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:59,023 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:59,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:59,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2018-09-23 19:37:59,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:59,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 19:37:59,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:37:59,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:37:59,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:37:59,085 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand 65 states. [2018-09-23 19:37:59,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:59,585 INFO L93 Difference]: Finished difference Result 387 states and 390 transitions. [2018-09-23 19:37:59,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:37:59,585 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 254 [2018-09-23 19:37:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:59,586 INFO L225 Difference]: With dead ends: 387 [2018-09-23 19:37:59,586 INFO L226 Difference]: Without dead ends: 259 [2018-09-23 19:37:59,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:37:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-23 19:37:59,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-23 19:37:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-23 19:37:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-09-23 19:37:59,591 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254 [2018-09-23 19:37:59,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:59,592 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-09-23 19:37:59,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:37:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-09-23 19:37:59,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-23 19:37:59,593 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:59,593 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2018-09-23 19:37:59,593 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:59,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1476829097, now seen corresponding path program 63 times [2018-09-23 19:37:59,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:59,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:59,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:59,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:59,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:59,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-09-23 19:38:01,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:01,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:38:01,254 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:03,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-23 19:38:03,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:03,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 4032 trivial. 0 not checked. [2018-09-23 19:38:03,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:03,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 19:38:03,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:38:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:38:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:38:03,730 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 66 states. [2018-09-23 19:38:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:04,289 INFO L93 Difference]: Finished difference Result 393 states and 396 transitions. [2018-09-23 19:38:04,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:38:04,289 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 258 [2018-09-23 19:38:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:04,290 INFO L225 Difference]: With dead ends: 393 [2018-09-23 19:38:04,290 INFO L226 Difference]: Without dead ends: 263 [2018-09-23 19:38:04,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:38:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-23 19:38:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-23 19:38:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-23 19:38:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 264 transitions. [2018-09-23 19:38:04,296 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 264 transitions. Word has length 258 [2018-09-23 19:38:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:04,296 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 264 transitions. [2018-09-23 19:38:04,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:38:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 264 transitions. [2018-09-23 19:38:04,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-23 19:38:04,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:04,298 INFO L375 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 1, 1, 1, 1] [2018-09-23 19:38:04,298 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:04,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1190144203, now seen corresponding path program 64 times [2018-09-23 19:38:04,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:04,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:04,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:04,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:04,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-09-23 19:38:06,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:06,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:38:06,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:38:06,265 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:38:06,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:06,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8320 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2018-09-23 19:38:06,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:06,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 19:38:06,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:38:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:38:06,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:38:06,333 INFO L87 Difference]: Start difference. First operand 263 states and 264 transitions. Second operand 67 states. [2018-09-23 19:38:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:06,811 INFO L93 Difference]: Finished difference Result 399 states and 402 transitions. [2018-09-23 19:38:06,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:38:06,812 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 262 [2018-09-23 19:38:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:06,813 INFO L225 Difference]: With dead ends: 399 [2018-09-23 19:38:06,813 INFO L226 Difference]: Without dead ends: 267 [2018-09-23 19:38:06,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:38:06,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-23 19:38:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-23 19:38:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-23 19:38:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-09-23 19:38:06,819 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 262 [2018-09-23 19:38:06,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:06,820 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-09-23 19:38:06,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:38:06,820 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-09-23 19:38:06,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-23 19:38:06,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:06,821 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1] [2018-09-23 19:38:06,822 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:06,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:06,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1043412799, now seen corresponding path program 65 times [2018-09-23 19:38:06,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:06,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:06,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:06,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:06,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:06,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-09-23 19:38:08,445 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:08,445 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 [2018-09-23 19:38:08,452 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:38:11,823 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-23 19:38:11,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:11,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2018-09-23 19:38:11,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:11,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 19:38:11,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:38:11,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:38:11,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:38:11,906 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 68 states. [2018-09-23 19:38:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:12,448 INFO L93 Difference]: Finished difference Result 405 states and 408 transitions. [2018-09-23 19:38:12,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:38:12,449 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 266 [2018-09-23 19:38:12,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:12,450 INFO L225 Difference]: With dead ends: 405 [2018-09-23 19:38:12,451 INFO L226 Difference]: Without dead ends: 271 [2018-09-23 19:38:12,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:38:12,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-23 19:38:12,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-23 19:38:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-23 19:38:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2018-09-23 19:38:12,456 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266 [2018-09-23 19:38:12,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:12,457 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2018-09-23 19:38:12,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:38:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2018-09-23 19:38:12,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-23 19:38:12,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:12,458 INFO L375 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 1, 1, 1, 1] [2018-09-23 19:38:12,459 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:12,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1094612045, now seen corresponding path program 66 times [2018-09-23 19:38:12,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:12,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:12,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:12,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:12,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-09-23 19:38:14,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:14,310 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 [2018-09-23 19:38:14,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:38:16,090 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-23 19:38:16,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:16,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8844 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2018-09-23 19:38:16,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:16,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 19:38:16,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:38:16,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:38:16,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:38:16,175 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 69 states. [2018-09-23 19:38:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:16,770 INFO L93 Difference]: Finished difference Result 411 states and 414 transitions. [2018-09-23 19:38:16,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:38:16,770 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 270 [2018-09-23 19:38:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:16,772 INFO L225 Difference]: With dead ends: 411 [2018-09-23 19:38:16,772 INFO L226 Difference]: Without dead ends: 275 [2018-09-23 19:38:16,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:38:16,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-23 19:38:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-23 19:38:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-23 19:38:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-09-23 19:38:16,777 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 270 [2018-09-23 19:38:16,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:16,778 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-09-23 19:38:16,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:38:16,778 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-09-23 19:38:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-23 19:38:16,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:16,779 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1] [2018-09-23 19:38:16,780 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:16,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:16,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1764107815, now seen corresponding path program 67 times [2018-09-23 19:38:16,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:16,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:16,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:16,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:16,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-09-23 19:38:18,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:18,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:38:18,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:18,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2018-09-23 19:38:18,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:18,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 19:38:18,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:38:18,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:38:18,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:38:18,714 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 70 states. [2018-09-23 19:38:19,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:19,362 INFO L93 Difference]: Finished difference Result 417 states and 420 transitions. [2018-09-23 19:38:19,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:38:19,362 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 274 [2018-09-23 19:38:19,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:19,364 INFO L225 Difference]: With dead ends: 417 [2018-09-23 19:38:19,364 INFO L226 Difference]: Without dead ends: 279 [2018-09-23 19:38:19,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:38:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-23 19:38:19,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-09-23 19:38:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-23 19:38:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2018-09-23 19:38:19,370 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2018-09-23 19:38:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:19,371 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2018-09-23 19:38:19,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:38:19,371 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2018-09-23 19:38:19,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-23 19:38:19,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:19,372 INFO L375 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 1, 1, 1, 1] [2018-09-23 19:38:19,373 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:19,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash 224659099, now seen corresponding path program 68 times [2018-09-23 19:38:19,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:19,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:19,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:19,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:19,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-09-23 19:38:21,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:21,459 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 [2018-09-23 19:38:21,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:38:21,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:38:21,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:21,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2018-09-23 19:38:21,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:21,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 19:38:21,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:38:21,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:38:21,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:38:21,651 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand 71 states. [2018-09-23 19:38:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:22,150 INFO L93 Difference]: Finished difference Result 423 states and 426 transitions. [2018-09-23 19:38:22,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:38:22,151 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 278 [2018-09-23 19:38:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:22,153 INFO L225 Difference]: With dead ends: 423 [2018-09-23 19:38:22,153 INFO L226 Difference]: Without dead ends: 283 [2018-09-23 19:38:22,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:38:22,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-23 19:38:22,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-09-23 19:38:22,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-23 19:38:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2018-09-23 19:38:22,158 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 278 [2018-09-23 19:38:22,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:22,158 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2018-09-23 19:38:22,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:38:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2018-09-23 19:38:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-23 19:38:22,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:22,160 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1] [2018-09-23 19:38:22,160 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:22,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:22,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1795173647, now seen corresponding path program 69 times [2018-09-23 19:38:22,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:22,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:22,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:22,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:22,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-09-23 19:38:24,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:24,009 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 [2018-09-23 19:38:24,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:27,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 19:38:27,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:27,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 4830 trivial. 0 not checked. [2018-09-23 19:38:27,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:27,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 19:38:27,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:38:27,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:38:27,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:38:27,467 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 72 states. [2018-09-23 19:38:28,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:28,032 INFO L93 Difference]: Finished difference Result 429 states and 432 transitions. [2018-09-23 19:38:28,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:38:28,032 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 282 [2018-09-23 19:38:28,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:28,034 INFO L225 Difference]: With dead ends: 429 [2018-09-23 19:38:28,034 INFO L226 Difference]: Without dead ends: 287 [2018-09-23 19:38:28,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:38:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-09-23 19:38:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-09-23 19:38:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-09-23 19:38:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 288 transitions. [2018-09-23 19:38:28,039 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 288 transitions. Word has length 282 [2018-09-23 19:38:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:28,039 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 288 transitions. [2018-09-23 19:38:28,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:38:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 288 transitions. [2018-09-23 19:38:28,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-23 19:38:28,040 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:28,040 INFO L375 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 1, 1, 1, 1] [2018-09-23 19:38:28,040 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:28,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:28,041 INFO L82 PathProgramCache]: Analyzing trace with hash -251684477, now seen corresponding path program 70 times [2018-09-23 19:38:28,041 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:28,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:28,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:28,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:28,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-09-23 19:38:29,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:29,948 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 [2018-09-23 19:38:29,954 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:38:30,068 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:38:30,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:30,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2018-09-23 19:38:30,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:30,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 19:38:30,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:38:30,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:38:30,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:38:30,146 INFO L87 Difference]: Start difference. First operand 287 states and 288 transitions. Second operand 73 states. [2018-09-23 19:38:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:30,832 INFO L93 Difference]: Finished difference Result 435 states and 438 transitions. [2018-09-23 19:38:30,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:38:30,833 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 286 [2018-09-23 19:38:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:30,834 INFO L225 Difference]: With dead ends: 435 [2018-09-23 19:38:30,834 INFO L226 Difference]: Without dead ends: 291 [2018-09-23 19:38:30,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:38:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-23 19:38:30,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-09-23 19:38:30,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-23 19:38:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2018-09-23 19:38:30,840 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 286 [2018-09-23 19:38:30,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:30,840 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2018-09-23 19:38:30,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:38:30,840 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2018-09-23 19:38:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-23 19:38:30,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:30,841 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1] [2018-09-23 19:38:30,842 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:30,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:30,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2112310263, now seen corresponding path program 71 times [2018-09-23 19:38:30,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:30,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:30,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:30,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:30,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-09-23 19:38:32,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:32,825 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 [2018-09-23 19:38:32,832 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:38:38,037 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-23 19:38:38,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:38,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2018-09-23 19:38:38,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:38,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 19:38:38,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:38:38,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:38:38,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:38:38,159 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 74 states. [2018-09-23 19:38:38,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:38,659 INFO L93 Difference]: Finished difference Result 441 states and 444 transitions. [2018-09-23 19:38:38,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:38:38,659 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 290 [2018-09-23 19:38:38,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:38,662 INFO L225 Difference]: With dead ends: 441 [2018-09-23 19:38:38,662 INFO L226 Difference]: Without dead ends: 295 [2018-09-23 19:38:38,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:38:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-09-23 19:38:38,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-09-23 19:38:38,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-09-23 19:38:38,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2018-09-23 19:38:38,668 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 290 [2018-09-23 19:38:38,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:38,668 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2018-09-23 19:38:38,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:38:38,668 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2018-09-23 19:38:38,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-23 19:38:38,670 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:38,670 INFO L375 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 1, 1, 1, 1] [2018-09-23 19:38:38,670 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:38,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:38,671 INFO L82 PathProgramCache]: Analyzing trace with hash 532431979, now seen corresponding path program 72 times [2018-09-23 19:38:38,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:38,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:38,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:38,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:38,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-09-23 19:38:40,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:40,956 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 [2018-09-23 19:38:40,964 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:38:43,769 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-23 19:38:43,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:43,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 5256 trivial. 0 not checked. [2018-09-23 19:38:43,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:43,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 19:38:43,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:38:43,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:38:43,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:38:43,877 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 75 states. [2018-09-23 19:38:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:44,540 INFO L93 Difference]: Finished difference Result 447 states and 450 transitions. [2018-09-23 19:38:44,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:38:44,540 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 294 [2018-09-23 19:38:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:44,543 INFO L225 Difference]: With dead ends: 447 [2018-09-23 19:38:44,543 INFO L226 Difference]: Without dead ends: 299 [2018-09-23 19:38:44,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:38:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-23 19:38:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-09-23 19:38:44,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-23 19:38:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2018-09-23 19:38:44,549 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 294 [2018-09-23 19:38:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:44,550 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2018-09-23 19:38:44,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:38:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2018-09-23 19:38:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-23 19:38:44,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:44,551 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1] [2018-09-23 19:38:44,552 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:44,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:44,552 INFO L82 PathProgramCache]: Analyzing trace with hash -737967393, now seen corresponding path program 73 times [2018-09-23 19:38:44,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:44,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:44,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:44,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:44,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-09-23 19:38:46,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:46,779 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 [2018-09-23 19:38:46,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:46,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2018-09-23 19:38:46,987 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:46,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 19:38:46,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:38:46,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:38:46,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:38:46,989 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand 76 states. [2018-09-23 19:38:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:47,609 INFO L93 Difference]: Finished difference Result 453 states and 456 transitions. [2018-09-23 19:38:47,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:38:47,609 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 298 [2018-09-23 19:38:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:47,611 INFO L225 Difference]: With dead ends: 453 [2018-09-23 19:38:47,611 INFO L226 Difference]: Without dead ends: 303 [2018-09-23 19:38:47,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:38:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-23 19:38:47,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-09-23 19:38:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-09-23 19:38:47,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 304 transitions. [2018-09-23 19:38:47,618 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 304 transitions. Word has length 298 [2018-09-23 19:38:47,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:47,618 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 304 transitions. [2018-09-23 19:38:47,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:38:47,619 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 304 transitions. [2018-09-23 19:38:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-23 19:38:47,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:47,620 INFO L375 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 1, 1, 1, 1] [2018-09-23 19:38:47,620 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:47,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1203898195, now seen corresponding path program 74 times [2018-09-23 19:38:47,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:47,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:47,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:47,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:47,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-09-23 19:38:49,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:49,972 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 [2018-09-23 19:38:49,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:38:50,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:38:50,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:50,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11100 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2018-09-23 19:38:50,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:50,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 19:38:50,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:38:50,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:38:50,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:38:50,180 INFO L87 Difference]: Start difference. First operand 303 states and 304 transitions. Second operand 77 states. [2018-09-23 19:38:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:50,907 INFO L93 Difference]: Finished difference Result 459 states and 462 transitions. [2018-09-23 19:38:50,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:38:50,907 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 302 [2018-09-23 19:38:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:50,909 INFO L225 Difference]: With dead ends: 459 [2018-09-23 19:38:50,909 INFO L226 Difference]: Without dead ends: 307 [2018-09-23 19:38:50,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:38:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-09-23 19:38:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-09-23 19:38:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-09-23 19:38:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2018-09-23 19:38:50,913 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 302 [2018-09-23 19:38:50,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:50,914 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2018-09-23 19:38:50,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:38:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2018-09-23 19:38:50,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-09-23 19:38:50,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:50,915 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1] [2018-09-23 19:38:50,916 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:50,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:50,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1753427513, now seen corresponding path program 75 times [2018-09-23 19:38:50,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:50,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:50,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:50,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:50,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-09-23 19:38:53,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:53,156 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 [2018-09-23 19:38:53,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:57,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-23 19:38:57,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:57,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 5700 trivial. 0 not checked. [2018-09-23 19:38:57,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:57,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 19:38:57,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:38:57,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:38:57,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:38:57,835 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 78 states. [2018-09-23 19:38:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:58,767 INFO L93 Difference]: Finished difference Result 465 states and 468 transitions. [2018-09-23 19:38:58,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:38:58,768 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 306 [2018-09-23 19:38:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:58,770 INFO L225 Difference]: With dead ends: 465 [2018-09-23 19:38:58,770 INFO L226 Difference]: Without dead ends: 311 [2018-09-23 19:38:58,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:38:58,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2018-09-23 19:38:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2018-09-23 19:38:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-09-23 19:38:58,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 312 transitions. [2018-09-23 19:38:58,791 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 312 transitions. Word has length 306 [2018-09-23 19:38:58,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:58,791 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 312 transitions. [2018-09-23 19:38:58,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:38:58,791 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 312 transitions. [2018-09-23 19:38:58,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-09-23 19:38:58,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:58,792 INFO L375 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 1, 1, 1, 1] [2018-09-23 19:38:58,792 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:58,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:58,793 INFO L82 PathProgramCache]: Analyzing trace with hash 255386171, now seen corresponding path program 76 times [2018-09-23 19:38:58,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:58,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:58,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:58,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:58,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-09-23 19:39:01,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:01,287 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 [2018-09-23 19:39:01,294 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:01,415 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:01,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:01,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11704 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2018-09-23 19:39:01,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:01,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 19:39:01,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 19:39:01,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 19:39:01,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:39:01,513 INFO L87 Difference]: Start difference. First operand 311 states and 312 transitions. Second operand 79 states. [2018-09-23 19:39:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:02,329 INFO L93 Difference]: Finished difference Result 471 states and 474 transitions. [2018-09-23 19:39:02,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 19:39:02,330 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 310 [2018-09-23 19:39:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:02,331 INFO L225 Difference]: With dead ends: 471 [2018-09-23 19:39:02,331 INFO L226 Difference]: Without dead ends: 315 [2018-09-23 19:39:02,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 19:39:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-23 19:39:02,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-09-23 19:39:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-09-23 19:39:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-09-23 19:39:02,336 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 310 [2018-09-23 19:39:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:02,336 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-09-23 19:39:02,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 19:39:02,336 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-09-23 19:39:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-09-23 19:39:02,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:02,338 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1] [2018-09-23 19:39:02,338 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:02,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:02,338 INFO L82 PathProgramCache]: Analyzing trace with hash -361023313, now seen corresponding path program 77 times [2018-09-23 19:39:02,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:02,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:02,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:02,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:02,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-09-23 19:39:04,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:04,661 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 [2018-09-23 19:39:04,668 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:13,810 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-23 19:39:13,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:13,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2018-09-23 19:39:13,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:13,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 19:39:13,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 19:39:13,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 19:39:13,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:39:13,919 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 80 states. [2018-09-23 19:39:14,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:14,786 INFO L93 Difference]: Finished difference Result 477 states and 480 transitions. [2018-09-23 19:39:14,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 19:39:14,786 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 314 [2018-09-23 19:39:14,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:14,788 INFO L225 Difference]: With dead ends: 477 [2018-09-23 19:39:14,788 INFO L226 Difference]: Without dead ends: 319 [2018-09-23 19:39:14,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 19:39:14,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-09-23 19:39:14,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-09-23 19:39:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-09-23 19:39:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 320 transitions. [2018-09-23 19:39:14,793 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 320 transitions. Word has length 314 [2018-09-23 19:39:14,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:14,793 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 320 transitions. [2018-09-23 19:39:14,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 19:39:14,793 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 320 transitions. [2018-09-23 19:39:14,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2018-09-23 19:39:14,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:14,795 INFO L375 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 1, 1, 1, 1] [2018-09-23 19:39:14,795 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:14,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:14,795 INFO L82 PathProgramCache]: Analyzing trace with hash 340317475, now seen corresponding path program 78 times [2018-09-23 19:39:14,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:14,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:14,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:14,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:14,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-09-23 19:39:17,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:17,325 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 [2018-09-23 19:39:17,333 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:20,822 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-23 19:39:20,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:20,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12324 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2018-09-23 19:39:20,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:20,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 19:39:20,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 19:39:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 19:39:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:39:20,919 INFO L87 Difference]: Start difference. First operand 319 states and 320 transitions. Second operand 81 states. [2018-09-23 19:39:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:21,580 INFO L93 Difference]: Finished difference Result 483 states and 486 transitions. [2018-09-23 19:39:21,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 19:39:21,580 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 318 [2018-09-23 19:39:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:21,582 INFO L225 Difference]: With dead ends: 483 [2018-09-23 19:39:21,582 INFO L226 Difference]: Without dead ends: 323 [2018-09-23 19:39:21,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 19:39:21,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-09-23 19:39:21,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-09-23 19:39:21,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-09-23 19:39:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions. [2018-09-23 19:39:21,586 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 318 [2018-09-23 19:39:21,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:21,587 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 324 transitions. [2018-09-23 19:39:21,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 19:39:21,587 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions. [2018-09-23 19:39:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-09-23 19:39:21,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:21,588 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1, 1, 1] [2018-09-23 19:39:21,588 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:21,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:21,589 INFO L82 PathProgramCache]: Analyzing trace with hash -416893033, now seen corresponding path program 79 times [2018-09-23 19:39:21,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:21,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:21,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:21,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:21,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-09-23 19:39:23,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:23,952 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 [2018-09-23 19:39:23,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:24,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2018-09-23 19:39:24,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:24,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 19:39:24,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 19:39:24,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 19:39:24,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:39:24,188 INFO L87 Difference]: Start difference. First operand 323 states and 324 transitions. Second operand 82 states. [2018-09-23 19:39:25,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:25,181 INFO L93 Difference]: Finished difference Result 489 states and 492 transitions. [2018-09-23 19:39:25,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 19:39:25,181 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 322 [2018-09-23 19:39:25,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:25,183 INFO L225 Difference]: With dead ends: 489 [2018-09-23 19:39:25,183 INFO L226 Difference]: Without dead ends: 327 [2018-09-23 19:39:25,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:39:25,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-23 19:39:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2018-09-23 19:39:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2018-09-23 19:39:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 328 transitions. [2018-09-23 19:39:25,191 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 328 transitions. Word has length 322 [2018-09-23 19:39:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:25,191 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 328 transitions. [2018-09-23 19:39:25,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 19:39:25,191 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 328 transitions. [2018-09-23 19:39:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2018-09-23 19:39:25,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:25,193 INFO L375 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 1, 1, 1, 1] [2018-09-23 19:39:25,193 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:25,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:25,193 INFO L82 PathProgramCache]: Analyzing trace with hash -317071349, now seen corresponding path program 80 times [2018-09-23 19:39:25,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:25,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:25,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:25,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:25,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-09-23 19:39:27,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:27,952 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 [2018-09-23 19:39:27,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:28,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:28,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:28,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12960 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2018-09-23 19:39:28,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:28,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 19:39:28,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 19:39:28,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 19:39:28,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:39:28,182 INFO L87 Difference]: Start difference. First operand 327 states and 328 transitions. Second operand 83 states. [2018-09-23 19:39:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:29,215 INFO L93 Difference]: Finished difference Result 495 states and 498 transitions. [2018-09-23 19:39:29,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 19:39:29,216 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 326 [2018-09-23 19:39:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:29,217 INFO L225 Difference]: With dead ends: 495 [2018-09-23 19:39:29,217 INFO L226 Difference]: Without dead ends: 331 [2018-09-23 19:39:29,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 19:39:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-09-23 19:39:29,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-09-23 19:39:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-09-23 19:39:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2018-09-23 19:39:29,222 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 326 [2018-09-23 19:39:29,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:29,223 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2018-09-23 19:39:29,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 19:39:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2018-09-23 19:39:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-09-23 19:39:29,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:29,224 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 1, 1, 1, 1] [2018-09-23 19:39:29,225 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:29,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:29,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1616425345, now seen corresponding path program 81 times [2018-09-23 19:39:29,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:29,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:29,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:29,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:29,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-09-23 19:39:32,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:32,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 19:39:32,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:38,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-23 19:39:38,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:38,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 6642 trivial. 0 not checked. [2018-09-23 19:39:38,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:38,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 19:39:38,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 19:39:38,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 19:39:38,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:39:38,903 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 84 states. [2018-09-23 19:39:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:39,877 INFO L93 Difference]: Finished difference Result 501 states and 504 transitions. [2018-09-23 19:39:39,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 19:39:39,878 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 330 [2018-09-23 19:39:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:39,879 INFO L225 Difference]: With dead ends: 501 [2018-09-23 19:39:39,880 INFO L226 Difference]: Without dead ends: 335 [2018-09-23 19:39:39,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:39:39,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-09-23 19:39:39,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2018-09-23 19:39:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-09-23 19:39:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2018-09-23 19:39:39,886 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 330 [2018-09-23 19:39:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:39,886 INFO L480 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2018-09-23 19:39:39,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 19:39:39,886 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2018-09-23 19:39:39,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-09-23 19:39:39,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:39,887 INFO L375 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 1, 1, 1, 1] [2018-09-23 19:39:39,887 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:39,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:39,888 INFO L82 PathProgramCache]: Analyzing trace with hash 668205811, now seen corresponding path program 82 times [2018-09-23 19:39:39,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:39,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:39,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:39,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:39,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:39,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-09-23 19:39:42,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:42,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:42,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:42,879 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:42,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:42,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2018-09-23 19:39:42,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:42,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 19:39:42,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 19:39:42,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 19:39:42,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:39:42,972 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 85 states. [2018-09-23 19:39:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:43,932 INFO L93 Difference]: Finished difference Result 507 states and 510 transitions. [2018-09-23 19:39:43,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 19:39:43,933 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 334 [2018-09-23 19:39:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:43,935 INFO L225 Difference]: With dead ends: 507 [2018-09-23 19:39:43,935 INFO L226 Difference]: Without dead ends: 339 [2018-09-23 19:39:43,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 19:39:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-23 19:39:43,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-09-23 19:39:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-09-23 19:39:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2018-09-23 19:39:43,941 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 334 [2018-09-23 19:39:43,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:43,941 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2018-09-23 19:39:43,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 19:39:43,941 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2018-09-23 19:39:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-09-23 19:39:43,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:43,943 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 1, 1, 1, 1] [2018-09-23 19:39:43,943 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:43,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash 505740647, now seen corresponding path program 83 times [2018-09-23 19:39:43,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:43,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:43,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:43,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:43,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-09-23 19:39:46,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:46,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:46,639 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:55,666 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-23 19:39:55,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:55,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2018-09-23 19:39:55,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:55,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 19:39:55,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 19:39:55,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 19:39:55,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:39:55,772 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 86 states. [2018-09-23 19:39:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:56,729 INFO L93 Difference]: Finished difference Result 513 states and 516 transitions. [2018-09-23 19:39:56,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 19:39:56,729 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 338 [2018-09-23 19:39:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:56,731 INFO L225 Difference]: With dead ends: 513 [2018-09-23 19:39:56,731 INFO L226 Difference]: Without dead ends: 343 [2018-09-23 19:39:56,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 19:39:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-09-23 19:39:56,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-09-23 19:39:56,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-09-23 19:39:56,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2018-09-23 19:39:56,738 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 338 [2018-09-23 19:39:56,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:56,738 INFO L480 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2018-09-23 19:39:56,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 19:39:56,738 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2018-09-23 19:39:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-09-23 19:39:56,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:56,740 INFO L375 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 1, 1, 1, 1] [2018-09-23 19:39:56,740 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:56,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:56,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1251950043, now seen corresponding path program 84 times [2018-09-23 19:39:56,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:56,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:56,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:56,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:56,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-09-23 19:39:59,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:59,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:59,677 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:40:04,156 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-23 19:40:04,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:04,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2018-09-23 19:40:04,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:04,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 19:40:04,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 19:40:04,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 19:40:04,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:40:04,297 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 87 states. [2018-09-23 19:40:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:05,447 INFO L93 Difference]: Finished difference Result 519 states and 522 transitions. [2018-09-23 19:40:05,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 19:40:05,448 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 342 [2018-09-23 19:40:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:05,450 INFO L225 Difference]: With dead ends: 519 [2018-09-23 19:40:05,450 INFO L226 Difference]: Without dead ends: 347 [2018-09-23 19:40:05,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:40:05,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2018-09-23 19:40:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2018-09-23 19:40:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2018-09-23 19:40:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 348 transitions. [2018-09-23 19:40:05,456 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 348 transitions. Word has length 342 [2018-09-23 19:40:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:05,456 INFO L480 AbstractCegarLoop]: Abstraction has 347 states and 348 transitions. [2018-09-23 19:40:05,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 19:40:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 348 transitions. [2018-09-23 19:40:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2018-09-23 19:40:05,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:05,458 INFO L375 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 1, 1, 1, 1] [2018-09-23 19:40:05,458 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:05,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:05,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1690813519, now seen corresponding path program 85 times [2018-09-23 19:40:05,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:05,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:05,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:05,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:05,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-09-23 19:40:08,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:08,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:08,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:08,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14620 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2018-09-23 19:40:08,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:08,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 19:40:08,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 19:40:08,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 19:40:08,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:40:08,702 INFO L87 Difference]: Start difference. First operand 347 states and 348 transitions. Second operand 88 states. [2018-09-23 19:40:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:09,611 INFO L93 Difference]: Finished difference Result 525 states and 528 transitions. [2018-09-23 19:40:09,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 19:40:09,612 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 346 [2018-09-23 19:40:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:09,614 INFO L225 Difference]: With dead ends: 525 [2018-09-23 19:40:09,614 INFO L226 Difference]: Without dead ends: 351 [2018-09-23 19:40:09,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 19:40:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-23 19:40:09,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-09-23 19:40:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-09-23 19:40:09,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 352 transitions. [2018-09-23 19:40:09,620 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 352 transitions. Word has length 346 [2018-09-23 19:40:09,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:09,620 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 352 transitions. [2018-09-23 19:40:09,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 19:40:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 352 transitions. [2018-09-23 19:40:09,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2018-09-23 19:40:09,622 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:09,622 INFO L375 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 1, 1, 1, 1] [2018-09-23 19:40:09,622 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:09,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash -744255293, now seen corresponding path program 86 times [2018-09-23 19:40:09,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:09,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:09,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:09,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:40:09,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-09-23 19:40:12,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:12,457 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:12,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:40:12,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:40:12,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:12,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2018-09-23 19:40:12,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:12,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 19:40:12,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 19:40:12,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 19:40:12,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:40:12,705 INFO L87 Difference]: Start difference. First operand 351 states and 352 transitions. Second operand 89 states. [2018-09-23 19:40:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:13,923 INFO L93 Difference]: Finished difference Result 531 states and 534 transitions. [2018-09-23 19:40:13,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:40:13,924 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 350 [2018-09-23 19:40:13,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:13,926 INFO L225 Difference]: With dead ends: 531 [2018-09-23 19:40:13,926 INFO L226 Difference]: Without dead ends: 355 [2018-09-23 19:40:13,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:40:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2018-09-23 19:40:13,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2018-09-23 19:40:13,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2018-09-23 19:40:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 356 transitions. [2018-09-23 19:40:13,931 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 356 transitions. Word has length 350 [2018-09-23 19:40:13,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:13,931 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 356 transitions. [2018-09-23 19:40:13,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 19:40:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 356 transitions. [2018-09-23 19:40:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2018-09-23 19:40:13,933 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:13,933 INFO L375 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 1, 1, 1, 1] [2018-09-23 19:40:13,933 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:13,933 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:13,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1840751415, now seen corresponding path program 87 times [2018-09-23 19:40:13,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:13,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:13,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:13,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:13,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-09-23 19:40:16,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:16,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:16,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:40:24,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-23 19:40:24,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:24,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15312 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 7656 trivial. 0 not checked. [2018-09-23 19:40:24,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:24,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 19:40:24,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 19:40:24,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 19:40:24,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:40:24,678 INFO L87 Difference]: Start difference. First operand 355 states and 356 transitions. Second operand 90 states. [2018-09-23 19:40:25,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:25,542 INFO L93 Difference]: Finished difference Result 537 states and 540 transitions. [2018-09-23 19:40:25,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 19:40:25,542 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 354 [2018-09-23 19:40:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:25,545 INFO L225 Difference]: With dead ends: 537 [2018-09-23 19:40:25,545 INFO L226 Difference]: Without dead ends: 359 [2018-09-23 19:40:25,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:40:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-09-23 19:40:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 359. [2018-09-23 19:40:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2018-09-23 19:40:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 360 transitions. [2018-09-23 19:40:25,551 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 360 transitions. Word has length 354 [2018-09-23 19:40:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:25,551 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 360 transitions. [2018-09-23 19:40:25,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 19:40:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 360 transitions. [2018-09-23 19:40:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-09-23 19:40:25,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:25,554 INFO L375 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 1, 1, 1, 1] [2018-09-23 19:40:25,554 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:25,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash 956890027, now seen corresponding path program 88 times [2018-09-23 19:40:25,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:25,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:25,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:25,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:25,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:40:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2018-09-23 19:40:28,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:40:28,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:40:28,758 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:40:28,907 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:40:28,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:40:28,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:40:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15664 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2018-09-23 19:40:29,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:40:29,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 19:40:29,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 19:40:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 19:40:29,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:40:29,006 INFO L87 Difference]: Start difference. First operand 359 states and 360 transitions. Second operand 91 states. [2018-09-23 19:40:29,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:40:29,930 INFO L93 Difference]: Finished difference Result 543 states and 546 transitions. [2018-09-23 19:40:29,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 19:40:29,930 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 358 [2018-09-23 19:40:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:40:29,932 INFO L225 Difference]: With dead ends: 543 [2018-09-23 19:40:29,932 INFO L226 Difference]: Without dead ends: 363 [2018-09-23 19:40:29,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 19:40:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-23 19:40:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-09-23 19:40:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-09-23 19:40:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 364 transitions. [2018-09-23 19:40:29,938 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 364 transitions. Word has length 358 [2018-09-23 19:40:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:40:29,939 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 364 transitions. [2018-09-23 19:40:29,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 19:40:29,939 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 364 transitions. [2018-09-23 19:40:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-09-23 19:40:29,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:40:29,940 INFO L375 BasicCegarLoop]: trace histogram [90, 90, 89, 89, 1, 1, 1, 1] [2018-09-23 19:40:29,940 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:40:29,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:40:29,941 INFO L82 PathProgramCache]: Analyzing trace with hash 723294751, now seen corresponding path program 89 times [2018-09-23 19:40:29,941 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:40:29,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:40:29,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:29,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:40:29,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:40:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:40:30,261 WARN L186 SmtUtils]: Removed 1 from assertion stack [2018-09-23 19:40:30,261 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:40:30,265 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:40:30,265 INFO L202 PluginConnector]: Adding new model array3.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:40:30 BoogieIcfgContainer [2018-09-23 19:40:30,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:40:30,266 INFO L168 Benchmark]: Toolchain (without parser) took 246613.56 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -23.6 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 428.5 MB). Peak memory consumption was 404.9 MB. Max. memory is 7.1 GB. [2018-09-23 19:40:30,268 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 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. [2018-09-23 19:40:30,268 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.88 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. [2018-09-23 19:40:30,268 INFO L168 Benchmark]: Boogie Preprocessor took 26.15 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. [2018-09-23 19:40:30,269 INFO L168 Benchmark]: RCFGBuilder took 326.59 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. [2018-09-23 19:40:30,269 INFO L168 Benchmark]: TraceAbstraction took 246206.93 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -23.6 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 407.4 MB). Peak memory consumption was 383.8 MB. Max. memory is 7.1 GB. [2018-09-23 19:40:30,272 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 0.21 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 47.88 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 26.15 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 326.59 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 246206.93 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -23.6 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 407.4 MB). Peak memory consumption was 383.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 56). Cancelled while BasicCegarLoop was analyzing trace of length 363 with TraceHistMax 90, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 3. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 246.1s OverallTime, 90 OverallIterations, 90 TraceHistogramMax, 38.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 534 SDtfs, 7253 SDslu, 10076 SDs, 0 SdLazy, 10254 SolverSat, 7507 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20198 GetRequests, 16193 SyntacticMatches, 0 SemanticMatches, 4005 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 108.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=363occurred in iteration=89, 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: 0.4s AutomataMinimizationTime, 89 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 84.9s SatisfiabilityAnalysisTime, 114.6s InterpolantComputationTime, 32390 NumberOfCodeBlocks, 32390 NumberOfCodeBlocksAsserted, 2128 NumberOfCheckSat, 32213 ConstructedInterpolants, 0 QuantifiedInterpolants, 15390013 SizeOfPredicates, 0 NumberOfNonLiveVariables, 48488 ConjunctsInSsa, 4092 ConjunctsInUnsatCore, 177 InterpolantComputations, 1 PerfectInterpolantSequences, 469920/939840 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/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-40-30-288.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array3.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-40-30-288.csv Completed graceful shutdown